ESP32 | FLUTTER | BLE - Temperature & Humidity Check App

Esp32_temperature_humidity_ble_FLUTTER/Esp32_Ble_test/Esp32_Ble_test.ino

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+/*
+    Video: https://www.youtube.com/watch?v=oCMOYS71NIU
+    Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleNotify.cpp
+    Ported to Arduino ESP32 by Evandro Copercini
+    updated by chegewara
+
+   Create a BLE server that, once we receive a connection, will send periodic notifications.
+   The service advertises itself as: 4fafc201-1fb5-459e-8fcc-c5c9c331914b
+   And has a characteristic of: beb5483e-36e1-4688-b7f5-ea07361b26a8
+
+   The design of creating the BLE server is:
+   1. Create a BLE Server
+   2. Create a BLE Service
+   3. Create a BLE Characteristic on the Service
+   4. Create a BLE Descriptor on the characteristic
+   5. Start the service.
+   6. Start advertising.
+
+   A connect hander associated with the server starts a background task that performs notification
+   every couple of seconds.
+*/
+#include <BLEDevice.h>
+#include <BLEServer.h>
+#include <BLEUtils.h>
+#include <BLE2902.h>
+
+BLEServer* pServer = NULL;
+BLECharacteristic* pCharacteristic = NULL;
+bool deviceConnected = false;
+bool oldDeviceConnected = false;
+uint32_t value = 0;
+
+// See the following for generating UUIDs:
+// https://www.uuidgenerator.net/
+
+#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
+#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
+
+
+class MyServerCallbacks: public BLEServerCallbacks {
+    void onConnect(BLEServer* pServer) {
+      deviceConnected = true;
+      BLEDevice::startAdvertising();
+    };
+
+    void onDisconnect(BLEServer* pServer) {
+      deviceConnected = false;
+    }
+};
+
+
+
+void setup() {
+  Serial.begin(115200);
+
+  // Create the BLE Device
+  BLEDevice::init("ESP32 Test");
+
+  // Create the BLE Server
+  pServer = BLEDevice::createServer();
+  pServer->setCallbacks(new MyServerCallbacks());
+
+  // Create the BLE Service
+  BLEService *pService = pServer->createService(SERVICE_UUID);
+
+  // Create a BLE Characteristic
+  pCharacteristic = pService->createCharacteristic(
+                      CHARACTERISTIC_UUID,
+                      BLECharacteristic::PROPERTY_READ   |
+                      BLECharacteristic::PROPERTY_WRITE  |
+                      BLECharacteristic::PROPERTY_NOTIFY |
+                      BLECharacteristic::PROPERTY_INDICATE
+                    );
+
+  // https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.descriptor.gatt.client_characteristic_configuration.xml
+  // Create a BLE Descriptor
+  pCharacteristic->addDescriptor(new BLE2902());
+
+  // Start the service
+  pService->start();
+
+  // Start advertising
+  BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
+  pAdvertising->addServiceUUID(SERVICE_UUID);
+  pAdvertising->setScanResponse(false);
+  pAdvertising->setMinPreferred(0x0);  // set value to 0x00 to not advertise this parameter
+  BLEDevice::startAdvertising();
+  Serial.println("Waiting a client connection to notify...");
+}
+
+void loop() {
+    // notify changed value
+    if (deviceConnected) {
+        pCharacteristic->setValue((uint8_t*)&value, 4);
+        pCharacteristic->notify();
+        value++;
+        delay(10); // bluetooth stack will go into congestion, if too many packets are sent, in 6 hours test i was able to go as low as 3ms
+    }
+    // disconnecting
+    if (!deviceConnected && oldDeviceConnected) {
+        delay(500); // give the bluetooth stack the chance to get things ready
+        pServer->startAdvertising(); // restart advertising
+        Serial.println("start advertising");
+        oldDeviceConnected = deviceConnected;
+    }
+    // connecting
+    if (deviceConnected && !oldDeviceConnected) {
+        // do stuff here on connecting
+        oldDeviceConnected = deviceConnected;
+    }
+}

Esp32_temperature_humidity_ble_FLUTTER/Esp32_ble_app/Esp32_ble_app.ino

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+// BLE
+#include <BLEDevice.h>
+#include <BLEServer.h>
+#include <BLEUtils.h>
+#include <BLE2902.h>
+
+BLEServer* pServer = NULL;
+BLECharacteristic* pCharacteristic = NULL;
+bool deviceConnected = false;
+bool oldDeviceConnected = false;
+
+#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
+#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
+
+class MyServerCallbacks: public BLEServerCallbacks {
+    void onConnect(BLEServer* pServer) {
+      deviceConnected = true;
+      BLEDevice::startAdvertising();
+    };
+
+    void onDisconnect(BLEServer* pServer) {
+      deviceConnected = false;
+    }
+};
+
+// SCREEN, DHT
+
+#include "SPIFFS.h"
+#include <JPEGDecoder.h>
+
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1351.h>
+#include <Adafruit_Sensor.h>
+#include <DHT.h>
+#include <DHT_U.h>
+
+#define DHTPIN 19    
+#define DHTTYPE    DHT11
+
+DHT_Unified dht(DHTPIN, DHTTYPE);
+
+uint32_t delayMS;
+
+#define SCREEN_WIDTH 128
+#define SCREEN_HEIGHT 128
+
+#define SCLK_PIN 18
+#define MOSI_PIN 23
+#define DC_PIN   17
+#define CS_PIN   5
+#define RST_PIN 4
+
+// Color definitions
+#define BLACK           0x0000
+#define BLUE            0x001F
+#define RED             0xF800
+#define GREEN           0x07E0
+#define CYAN            0x07FF
+#define MAGENTA         0xF81F
+#define YELLOW          0xFFE0  
+#define WHITE           0xFFFF
+
+const String fileTemperature = "/temperature.jpg";
+const String fileHumidity = "/humidity.jpg";
+
+Adafruit_SSD1351 tft = Adafruit_SSD1351(SCREEN_WIDTH, SCREEN_HEIGHT, CS_PIN, DC_PIN, MOSI_PIN, SCLK_PIN, RST_PIN);
+
+float prev_temp;
+float prev_humidity;
+
+
+// Thread  
+#include <Thread.h>
+#include <ThreadController.h>
+
+// ThreadController that will controll all threads
+ThreadController controll = ThreadController();
+
+Thread* btThread = new Thread();
+Thread* drawingThread = new Thread();
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(115200);
+
+  initDrawing();
+  initBT();
+  
+  btThread->onRun(btCallback);
+  btThread->setInterval(100);
+
+  drawingThread->onRun(drawingCallback);
+  drawingThread->setInterval(delayMS);
+
+  controll.add(btThread);
+  controll.add(drawingThread);
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  controll.run();
+}
+
+void drawingCallback(){
+  sensors_event_t event;
+  dht.temperature().getEvent(&event);
+  if (isnan(event.temperature)) {
+    Serial.println(F("Error reading temperature!"));
+  }
+  else {
+    Serial.print(F("Temperature: "));
+    Serial.print(event.temperature);
+    Serial.println(F("°C"));
+    updateTemp(event.temperature);
+  }
+  // Get humidity event and print its value.
+  dht.humidity().getEvent(&event);
+  if (isnan(event.relative_humidity)) {
+    Serial.println(F("Error reading humidity!"));
+  }
+  else {
+    Serial.print(F("Humidity: "));
+    Serial.print(event.relative_humidity);
+    Serial.println(F("%"));
+    updateHumidity(event.relative_humidity);
+  }
+}
+
+void updateTemp(float temp){
+  if(prev_temp != temp){
+    tft.fillRect(64, 0, 128, 64, WHITE);
+    tft.setCursor(70, 24);
+    tft.setTextColor(BLACK);
+    tft.setTextSize(3);
+    String tempString = "";
+    tempString += (int)temp;
+    tempString += "C";
+    tft.print(tempString);
+    prev_temp = temp;
+  }
+}
+
+void updateHumidity(float humidity){
+  if(prev_humidity != humidity){
+    tft.fillRect(64, 64, 128, 128, WHITE);
+    tft.setCursor(70, 88);
+    tft.setTextColor(BLACK);
+    tft.setTextSize(3);
+    String humidityString = "";
+    humidityString += (int)humidity;
+    humidityString += "%";
+    tft.print(humidityString);
+    prev_humidity = humidity;
+  }
+}
+
+void btCallback(){
+  // notify changed value
+    if (deviceConnected) {
+
+      String str = "";
+      str += prev_temp;
+      str += ",";
+      str += prev_humidity;
+      
+      pCharacteristic->setValue((char*)str.c_str());
+      pCharacteristic->notify();
+
+    }
+    // disconnecting
+    if (!deviceConnected && oldDeviceConnected) {
+        //delay(500); // give the bluetooth stack the chance to get things ready
+        pServer->startAdvertising(); // restart advertising
+        Serial.println("start advertising");
+        oldDeviceConnected = deviceConnected;
+    }
+    // connecting
+    if (deviceConnected && !oldDeviceConnected) {
+        // do stuff here on connecting
+        oldDeviceConnected = deviceConnected;
+    }
+}
+
+void initBT(){
+  // Create the BLE Device
+  BLEDevice::init("ESP32 Test");
+
+  // Create the BLE Server
+  pServer = BLEDevice::createServer();
+  pServer->setCallbacks(new MyServerCallbacks());
+
+  // Create the BLE Service
+  BLEService *pService = pServer->createService(SERVICE_UUID);
+
+  // Create a BLE Characteristic
+  pCharacteristic = pService->createCharacteristic(
+                      CHARACTERISTIC_UUID,
+                      BLECharacteristic::PROPERTY_READ   |
+                      BLECharacteristic::PROPERTY_WRITE  |
+                      BLECharacteristic::PROPERTY_NOTIFY |
+                      BLECharacteristic::PROPERTY_INDICATE
+                    );
+
+  // https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.descriptor.gatt.client_characteristic_configuration.xml
+  // Create a BLE Descriptor
+  pCharacteristic->addDescriptor(new BLE2902());
+
+  // Start the service
+  pService->start();
+
+  // Start advertising
+  BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
+  pAdvertising->addServiceUUID(SERVICE_UUID);
+  pAdvertising->setScanResponse(false);
+  pAdvertising->setMinPreferred(0x0);  // set value to 0x00 to not advertise this parameter
+  BLEDevice::startAdvertising();
+  Serial.println("Waiting a client connection to notify...");
+  
+}
+
+void initDrawing(){
+  tft.begin();
+  tft.fillRect(0,0,128,128,WHITE);
+  
+  dht.begin();
+  
+  // Print temperature sensor details.
+  sensor_t sensor;
+  dht.temperature().getSensor(&sensor);
+
+  // Print humidity sensor details.
+  dht.humidity().getSensor(&sensor);
+  
+  // Set delay between sensor readings based on sensor details.
+  delayMS = sensor.min_delay / 1000;
+
+  if(!SPIFFS.begin()){
+    while(1) yield();
+  }
+
+  drawFSJpeg(fileTemperature.c_str(), 0, 0);
+  drawFSJpeg(fileHumidity.c_str(), 0, 64);
+
+  tft.setCursor(72, 24);
+  tft.setTextColor(BLACK);
+  tft.setTextSize(3);
+  tft.print("?");
+
+  tft.setCursor(72, 88);
+  tft.setTextColor(BLACK);
+  tft.setTextSize(3);
+  tft.print("?"); 
+}
+
+
+/*====================================================================================
+  This sketch contains support functions to render the Jpeg images.
+
+  Created by Bodmer 15th Jan 2017
+  ==================================================================================*/
+
+// Return the minimum of two values a and b
+#define minimum(a,b)     (((a) < (b)) ? (a) : (b))
+
+//====================================================================================
+//   This function opens the Filing System Jpeg image file and primes the decoder
+//====================================================================================
+void drawFSJpeg(const char *filename, int xpos, int ypos) {
+
+  Serial.println("=====================================");
+  Serial.print("Drawing file: "); Serial.println(filename);
+  Serial.println("=====================================");
+
+  // Open the file (the Jpeg decoder library will close it)
+  fs::File jpgFile = SPIFFS.open( filename, "r");    // File handle reference for SPIFFS
+  //  File jpgFile = SD.open( filename, FILE_READ);  // or, file handle reference for SD library
+ 
+  if ( !jpgFile ) {
+    Serial.print("ERROR: File \""); Serial.print(filename); Serial.println ("\" not found!");
+    return;
+  }
+
+  // To initialise the decoder and provide the file, we can use one of the three following methods:
+  //boolean decoded = JpegDec.decodeFsFile(jpgFile); // We can pass the SPIFFS file handle to the decoder,
+  //boolean decoded = JpegDec.decodeSdFile(jpgFile); // or we can pass the SD file handle to the decoder,
+  boolean decoded = JpegDec.decodeFsFile(filename);  // or we can pass the filename (leading / distinguishes SPIFFS files)
+                                                     // The filename can be a String or character array
+  if (decoded) {
+    // print information about the image to the serial port
+    jpegInfo();
+
+    // render the image onto the screen at given coordinates
+    jpegRender(xpos, ypos);
+  }
+  else {
+    Serial.println("Jpeg file format not supported!");
+  }
+}
+
+//====================================================================================
+//   Decode and paint onto the TFT screen
+//====================================================================================
+void jpegRender(int xpos, int ypos) {
+
+  // retrieve infomration about the image
+  uint16_t  *pImg;
+  uint16_t mcu_w = JpegDec.MCUWidth;
+  uint16_t mcu_h = JpegDec.MCUHeight;
+  uint32_t max_x = JpegDec.width;
+  uint32_t max_y = JpegDec.height;
+
+  // Jpeg images are draw as a set of image block (tiles) called Minimum Coding Units (MCUs)
+  // Typically these MCUs are 16x16 pixel blocks
+  // Determine the width and height of the right and bottom edge image blocks
+  uint32_t min_w = minimum(mcu_w, max_x % mcu_w);
+  uint32_t min_h = minimum(mcu_h, max_y % mcu_h);
+
+  // save the current image block size
+  uint32_t win_w = mcu_w;
+  uint32_t win_h = mcu_h;
+
+  // record the current time so we can measure how long it takes to draw an image
+  uint32_t drawTime = millis();
+
+  // save the coordinate of the right and bottom edges to assist image cropping
+  // to the screen size
+  max_x += xpos;
+  max_y += ypos;
+
+  // read each MCU block until there are no more
+  while ( JpegDec.read()) {
+
+    // save a pointer to the image block
+    pImg = JpegDec.pImage;
+
+    // calculate where the image block should be drawn on the screen
+    int mcu_x = JpegDec.MCUx * mcu_w + xpos;
+    int mcu_y = JpegDec.MCUy * mcu_h + ypos;
+
+    // check if the image block size needs to be changed for the right edge
+    if (mcu_x + mcu_w <= max_x) win_w = mcu_w;
+    else win_w = min_w;
+
+    // check if the image block size needs to be changed for the bottom edge
+    if (mcu_y + mcu_h <= max_y) win_h = mcu_h;
+    else win_h = min_h;
+
+    // copy pixels into a contiguous block
+    if (win_w != mcu_w)
+    {
+      for (int h = 1; h < win_h-1; h++)
+      {
+        memcpy(pImg + h * win_w, pImg + (h + 1) * mcu_w, win_w << 1);
+      }
+    }
+
+
+    // draw image MCU block only if it will fit on the screen
+    if ( ( mcu_x + win_w) <= tft.width() && ( mcu_y + win_h) <= tft.height())
+    {
+      tft.drawRGBBitmap(mcu_x, mcu_y, pImg, win_w, win_h);
+    }
+
+    // Stop drawing blocks if the bottom of the screen has been reached,
+    // the abort function will close the file
+    else if ( ( mcu_y + win_h) >= tft.height()) JpegDec.abort();
+
+  }
+
+  // calculate how long it took to draw the image
+  drawTime = millis() - drawTime;
+
+  // print the results to the serial port
+  Serial.print  ("Total render time was    : "); Serial.print(drawTime); Serial.println(" ms");
+  Serial.println("=====================================");
+
+}
+
+//====================================================================================
+//   Send time taken to Serial port
+//====================================================================================
+void jpegInfo() {
+  Serial.println(F("==============="));
+  Serial.println(F("JPEG image info"));
+  Serial.println(F("==============="));
+  Serial.print(F(  "Width      :")); Serial.println(JpegDec.width);
+  Serial.print(F(  "Height     :")); Serial.println(JpegDec.height);
+  Serial.print(F(  "Components :")); Serial.println(JpegDec.comps);
+  Serial.print(F(  "MCU / row  :")); Serial.println(JpegDec.MCUSPerRow);
+  Serial.print(F(  "MCU / col  :")); Serial.println(JpegDec.MCUSPerCol);
+  Serial.print(F(  "Scan type  :")); Serial.println(JpegDec.scanType);
+  Serial.print(F(  "MCU width  :")); Serial.println(JpegDec.MCUWidth);
+  Serial.print(F(  "MCU height :")); Serial.println(JpegDec.MCUHeight);
+  Serial.println(F("==============="));
+}
+
+//====================================================================================
+//   Open a Jpeg file and dump it to the Serial port as a C array
+//====================================================================================
+void createArray(const char *filename) {
+
+  fs::File jpgFile;  // File handle reference for SPIFFS
+  //  File jpgFile;  // File handle reference For SD library
+  
+  if ( !( jpgFile = SPIFFS.open( filename, "r"))) {
+    Serial.println(F("JPEG file not found"));
+    return;
+  }
+
+  uint8_t data;
+  byte line_len = 0;
+  Serial.println("// Generated by a JPEGDecoder library example sketch:");
+  Serial.println("// https://github.com/Bodmer/JPEGDecoder");
+  Serial.println("");
+  Serial.println("#if defined(__AVR__)");
+  Serial.println("  #include <avr/pgmspace.h>");
+  Serial.println("#endif");
+  Serial.println("");
+  Serial.print("const uint8_t ");
+  while (*filename != '.') Serial.print(*filename++);
+  Serial.println("[] PROGMEM = {"); // PROGMEM added for AVR processors, it is ignored by Due
+
+  while ( jpgFile.available()) {
+
+    data = jpgFile.read();
+    Serial.print("0x"); if (abs(data) < 16) Serial.print("0");
+    Serial.print(data, HEX); Serial.print(",");// Add value and comma
+    line_len++;
+    if ( line_len >= 32) {
+      line_len = 0;
+      Serial.println();
+    }
+
+  }
+
+  Serial.println("};\r\n");
+  // jpgFile.seek( 0, SeekEnd);
+  jpgFile.close();
+}
+//====================================================================================

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/.gitignore

@@ -0,0 +1,72 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+.dart_tool/
+.flutter-plugins
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Android related
+**/android/**/gradle-wrapper.jar
+**/android/.gradle
+**/android/captures/
+**/android/gradlew
+**/android/gradlew.bat
+**/android/local.properties
+**/android/**/GeneratedPluginRegistrant.java
+
+# iOS/XCode related
+**/ios/**/*.mode1v3
+**/ios/**/*.mode2v3
+**/ios/**/*.moved-aside
+**/ios/**/*.pbxuser
+**/ios/**/*.perspectivev3
+**/ios/**/*sync/
+**/ios/**/.sconsign.dblite
+**/ios/**/.tags*
+**/ios/**/.vagrant/
+**/ios/**/DerivedData/
+**/ios/**/Icon?
+**/ios/**/Pods/
+**/ios/**/.symlinks/
+**/ios/**/profile
+**/ios/**/xcuserdata
+**/ios/.generated/
+**/ios/Flutter/App.framework
+**/ios/Flutter/Flutter.framework
+**/ios/Flutter/Generated.xcconfig
+**/ios/Flutter/app.flx
+**/ios/Flutter/app.zip
+**/ios/Flutter/flutter_assets/
+**/ios/ServiceDefinitions.json
+**/ios/Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!**/ios/**/default.mode1v3
+!**/ios/**/default.mode2v3
+!**/ios/**/default.pbxuser
+!**/ios/**/default.perspectivev3
+!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/.metadata

@@ -0,0 +1,10 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: b712a172f9694745f50505c93340883493b505e5
+  channel: stable
+
+project_type: app

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/README.md

@@ -0,0 +1,16 @@
+# flutter_ble_app
+
+A new Flutter application.
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://flutter.dev/docs/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://flutter.dev/docs/cookbook)
+
+For help getting started with Flutter, view our
+[online documentation](https://flutter.dev/docs), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/app/build.gradle

@@ -0,0 +1,61 @@
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader('UTF-8') { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterRoot = localProperties.getProperty('flutter.sdk')
+if (flutterRoot == null) {
+    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+}
+
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+if (flutterVersionCode == null) {
+    flutterVersionCode = '1'
+}
+
+def flutterVersionName = localProperties.getProperty('flutter.versionName')
+if (flutterVersionName == null) {
+    flutterVersionName = '1.0'
+}
+
+apply plugin: 'com.android.application'
+apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+
+android {
+    compileSdkVersion 28
+
+    lintOptions {
+        disable 'InvalidPackage'
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "com.eric.flutter_ble_app"
+        minSdkVersion 24
+        targetSdkVersion 28
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig signingConfigs.debug
+        }
+    }
+}
+
+flutter {
+    source '../..'
+}
+
+dependencies {
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.eric.flutter_ble_app">
+    <!-- Flutter needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,33 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.eric.flutter_ble_app">
+
+    <!-- io.flutter.app.FlutterApplication is an android.app.Application that
+         calls FlutterMain.startInitialization(this); in its onCreate method.
+         In most cases you can leave this as-is, but you if you want to provide
+         additional functionality it is fine to subclass or reimplement
+         FlutterApplication and put your custom class here. -->
+    <application
+        android:name="io.flutter.app.FlutterApplication"
+        android:label="flutter_ble_app"
+        android:icon="@mipmap/ic_launcher">
+        <activity
+            android:name=".MainActivity"
+            android:launchMode="singleTop"
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- This keeps the window background of the activity showing
+                 until Flutter renders its first frame. It can be removed if
+                 there is no splash screen (such as the default splash screen
+                 defined in @style/LaunchTheme). -->
+            <meta-data
+                android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
+                android:value="true" />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/app/src/main/java/com/eric/flutter_ble_app/MainActivity.java

@@ -0,0 +1,13 @@
+package com.eric.flutter_ble_app;
+
+import android.os.Bundle;
+import io.flutter.app.FlutterActivity;
+import io.flutter.plugins.GeneratedPluginRegistrant;
+
+public class MainActivity extends FlutterActivity {
+  @Override
+  protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    GeneratedPluginRegistrant.registerWith(this);
+  }
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/app/src/main/res/drawable/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/app/src/main/res/values/styles.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             Flutter draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+</resources>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/app/src/profile/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.eric.flutter_ble_app">
+    <!-- Flutter needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/build.gradle

@@ -0,0 +1,29 @@
+buildscript {
+    repositories {
+        google()
+        jcenter()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.2.1'
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+rootProject.buildDir = '../build'
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(':app')
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/gradle.properties

@@ -0,0 +1,2 @@
+org.gradle.jvmargs=-Xmx1536M
+

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Fri Jun 23 08:50:38 CEST 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/android/settings.gradle

@@ -0,0 +1,15 @@
+include ':app'
+
+def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()
+
+def plugins = new Properties()
+def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
+if (pluginsFile.exists()) {
+    pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
+}
+
+plugins.each { name, path ->
+    def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
+    include ":$name"
+    project(":$name").projectDir = pluginDirectory
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/.gitignore

@@ -0,0 +1,7 @@
+.DS_Store
+.dart_tool/
+
+.packages
+.pub/
+
+build/

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/.metadata

@@ -0,0 +1,10 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: 7a4c33425ddd78c54aba07d86f3f9a4a0051769b
+  channel: stable
+
+project_type: plugin

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/CHANGELOG.md

@@ -0,0 +1,97 @@
+## 0.5.1
+* Forked repo to internal use 
+* Upgrade Android protobuf dependencies
+* Refresh iOS build files
+
+## 0.5.0
+* **Breaking change**. Migrate from the deprecated original Android Support
+  Library to AndroidX. This shouldn't result in any functional changes, but it
+  requires any Android apps using this plugin to [also
+  migrate](https://developer.android.com/jetpack/androidx/migrate) if they're
+  using the original support library.
+
+## 0.4.2+1
+* Upgrade Android Gradle plugin to 3.3.0
+* Refresh iOS build files
+
+## 0.4.2
+* Set the verbosity of log messages with `setLogLevel`
+* Updated iOS and Android project files
+* `autoConnect` now configurable for Android
+* Various bug fixes
+
+## 0.4.1
+* Fixed bug where setNotifyValue wasn't properly awaitable.
+* Various UI bug fixes to example app.
+* Removed unnecessary intl dependencies in example app.
+
+## 0.4.0
+* **Breaking change**. Manufacturer Data is now a `Map` of manufacturer ID's.
+* Service UUID's, service data, tx power level packets fixed in advertising data.
+* Example app updated to show advertising data.
+* Various other bug fixes.
+
+## 0.3.4
+* Updated to use the latest protobuf (^0.9.0+1)
+* Updated other dependencies
+
+## 0.3.3
+* `scan` `withServices` to filter by service UUID's (iOS)
+* Error handled when trying to scan with adapter off (Android)
+
+## 0.3.2
+* Runtime permissions for Android
+* `scan` `withServices` to filter by service UUID's (Android)
+* Scan mode can be specified (Android)
+* Now targets the latest android SDK
+* Dart 2 compatibility
+
+## 0.3.1
+* Now allows simultaneous notifications of characteristics
+* Fixed bug on iOS that was returning `discoverServices` too early
+
+## 0.3.0
+* iOS support added
+* Bug fixed in example causing discoverServices to be called multiple times
+* Various other bug fixes
+
+## 0.2.4
+* **Breaking change**. Upgraded to Gradle 4.1 and Android Studio Gradle plugin
+  3.0.1. Older Flutter projects need to upgrade their Gradle setup as well in
+  order to use this version of the plugin. Instructions can be found
+  [here](https://github.com/flutter/flutter/wiki/Updating-Flutter-projects-to-Gradle-4.1-and-Android-Studio-Gradle-plugin-3.0.1).
+
+## 0.2.3
+* Bug fixes
+
+## 0.2.2
+* **Breaking changes**:
+* `startScan` renamed to `scan`
+* `ScanResult` now returns a `BluetoothDevice`
+* `connect` now takes a `BluetoothDevice` and returns Stream<BluetoothDeviceState>
+* Added parameter `timeout` to `connect`
+* Automatic disconnect on deviceConnection.cancel()
+
+## 0.2.1
+* **Breaking change**. Removed `stopScan` from API, use `scanSubscription.cancel()` instead
+* Automatically stops scan when `startScan` subscription is canceled (thanks to @brianegan)
+* Added `timeout` parameter to `startScan`
+* Updated example app to show new scan functionality
+
+## 0.2.0
+
+* Added state and onStateChanged for BluetoothDevice
+* Updated example to show new functionality
+
+## 0.1.1
+
+* Fixed image for pub.dartlang.org
+
+## 0.1.0
+
+* Characteristic notifications/indications.
+* Merged in Guid library, removed from pubspec.yaml.
+
+## 0.0.1 - September 1st, 2017
+
+* Initial Release.

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/LICENSE

@@ -0,0 +1 @@
+TODO: Add your license here.

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/README.md

@@ -0,0 +1,119 @@
+
+<br>
+<p align="center">
+<img alt="FlutterBle" src="https://github.com/pauldemarco/flutter_blue/blob/master/site/flutterblue.png?raw=true" />
+</p>
+<br><br>
+
+## Introduction
+
+FlutterBle is a bluetooth plugin for [Flutter](http://www.flutter.io), a new mobile SDK to help developers build modern apps for iOS and Android.
+fork of [FlutterBlue](https://github.com/pauldemarco/flutter_blue) 
+
+## Cross-Platform Bluetooth LE
+FlutterBle aims to offer the most from both platforms (iOS and Android).
+
+Using the FlutterBle instance, you can scan for and connect to nearby devices ([BluetoothDevice](#bluetoothdevice-api)).
+Once connected to a device, the BluetoothDevice object can discover services ([BluetoothService](lib/src/bluetooth_service.dart)), characteristics ([BluetoothCharacteristic](lib/src/bluetooth_characteristic.dart)), and descriptors ([BluetoothDescriptor](lib/src/bluetooth_descriptor.dart)).
+The BluetoothDevice object is then used to directly interact with characteristics and descriptors.
+
+## Usage
+### Obtain an instance
+```dart
+FlutterBle flutterBlue = FlutterBle.instance;
+```
+
+### Scan for devices
+```dart
+/// Start scanning
+var scanSubscription = flutterBlue.scan().listen((scanResult) {
+    // do something with scan result
+});
+
+/// Stop scanning
+scanSubscription.cancel();
+```
+
+### Connect to a device
+```dart
+/// Create a connection to the device
+var deviceConnection = flutterBlue.connect(device).listen((s) {
+    if(s == BluetoothDeviceState.connected) {
+        // device is connected, do something
+    }
+});
+
+/// Disconnect from device
+deviceConnection.cancel();
+```
+
+### Discover services
+```dart
+List<BluetoothService> services = await device.discoverServices();
+services.forEach((service) {
+    // do something with service
+});
+```
+
+### Read and write characteristics
+```dart
+// Reads all characteristics
+var characteristics = service.characteristics;
+for(BluetoothCharacteristic c in characteristics) {
+    List<int> value = await device.readCharacteristic(c);
+    print(value);
+}
+
+// Writes to a characteristic
+await device.writeCharacteristic(c, [0x12, 0x34])
+```
+
+### Read and write descriptors
+```dart
+// Reads all descriptors
+var descriptors = characteristic.descriptors;
+for(BluetoothDescriptor d in descriptors) {
+    List<int> value = await device.readDescriptor(d);
+    print(value);
+}
+
+// Writes to a descriptor
+await device.writeDescriptor(d, [0x12, 0x34])
+```
+
+### Set notifications
+```dart
+await device.setNotifyValue(characteristic, true);
+device.onValueChanged(characteristic).listen((value) {
+    // do something with new value
+});
+```
+
+## Reference
+### FlutterBle API
+|                  |      Android       |         iOS          |             Description            |
+| :--------------- | :----------------: | :------------------: |  :-------------------------------- |
+| scan             | :white_check_mark: |  :white_check_mark:  | Starts a scan for Bluetooth Low Energy devices. |
+| connect          | :white_check_mark: |  :white_check_mark:  | Establishes a connection to the Bluetooth Device. |
+| state            | :white_check_mark: |  :white_check_mark:  | Gets the current state of the Bluetooth Adapter. |
+| onStateChanged   | :white_check_mark: |  :white_check_mark:  | Stream of state changes for the Bluetooth Adapter. |
+
+### BluetoothDevice API
+|                             |       Android        |         iOS          |             Description            |
+| :-------------------------- | :------------------: | :------------------: |  :-------------------------------- |
+| discoverServices            |  :white_check_mark:  |  :white_check_mark:  | Discovers services offered by the remote device as well as their characteristics and descriptors. |
+| services                    |  :white_check_mark:  |  :white_check_mark:  | Gets a list of services. Requires that discoverServices() has completed. |
+| readCharacteristic          |  :white_check_mark:  |  :white_check_mark:  | Retrieves the value of a specified characteristic.  |
+| readDescriptor              |  :white_check_mark:  |  :white_check_mark:  | Retrieves the value of a specified descriptor.  |
+| writeCharacteristic         |  :white_check_mark:  |  :white_check_mark:  | Writes the value of a characteristic. |
+| writeDescriptor             |  :white_check_mark:  |  :white_check_mark:  | Writes the value of a descriptor. |
+| setNotifyValue              |  :white_check_mark:  |  :white_check_mark:  | Sets notifications or indications on the specified characteristic. |
+| onValueChanged              |  :white_check_mark:  |  :white_check_mark:  | Notifies when the characteristic's value has changed. |
+| state                       |  :white_check_mark:  |  :white_check_mark:  | Gets the current state of the Bluetooth Device. |
+| onStateChanged              |  :white_check_mark:  |  :white_check_mark:  | Notifies of state changes for the Bluetooth Device. |
+
+
+## Troubleshooting
+### Scanning for service UUID's doesn't return any results
+Make sure the device is advertising which service UUID's it supports.  This is found in the advertisement
+packet as **UUID 16 bit complete list** or **UUID 128 bit complete list**.

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/android/.gitignore

@@ -0,0 +1,8 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/android/build.gradle

@@ -0,0 +1,77 @@
+group 'ai.longev.flutter.flutter_ble'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    repositories {
+        google()
+        jcenter()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.4.1'
+        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.8'
+    }
+}
+
+rootProject.allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'com.google.protobuf'
+
+
+android {
+    compileSdkVersion 28
+
+    defaultConfig {
+        minSdkVersion 19
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    lintOptions {
+        disable 'InvalidPackage'
+    }
+    sourceSets {
+        main {
+            proto {
+                srcDir '../protos'
+            }
+        }
+    }
+    dependencies {
+        // Required for local unit tests (JUnit 4 framework)
+        implementation 'androidx.core:core:1.0.2'
+    }
+}
+
+
+protobuf {
+    // Configure the protoc executable
+    protoc {
+        // Download from repositories
+        artifact = 'com.google.protobuf:protoc:3.7.0'
+    }
+    plugins {
+        javalite {  artifact = 'com.google.protobuf:protoc-gen-javalite:3.0.0'}
+        grpc { artifact = 'io.grpc:protoc-gen-grpc-java:1.19.0' }
+    }
+    generateProtoTasks {
+        all().each { task ->
+            task.plugins {
+                javalite {}
+                grpc {
+                    // Options added to --grpc_out
+                    option 'lite'
+                }
+            }
+        }
+    }
+}
+
+dependencies {
+    implementation 'com.google.protobuf:protobuf-lite:3.0.1'
+
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/android/gradle.properties

@@ -0,0 +1 @@
+org.gradle.jvmargs=-Xmx1536M

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/android/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'flutter_ble'

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/android/src/main/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="ai.longev.flutter.flutter_ble">
+
+    <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+</manifest>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/android/src/main/java/ai/longev/flutter/flutter_ble/AdvertisementParser.java

@@ -0,0 +1,106 @@
+package ai.longev.flutter.flutter_ble;
+
+
+import com.google.protobuf.ByteString;
+import ai.longev.flutter.flutter_ble.Protos;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
+import java.util.UUID;
+
+/**
+ * Parser of Bluetooth Advertisement packets.
+ */
+class AdvertisementParser {
+
+    /**
+     * Parses packet data into {@link Protos.AdvertisementData} structure.
+     *
+     * @param rawData The scan record data.
+     * @return An AdvertisementData proto object.
+     * @throws ArrayIndexOutOfBoundsException if the input is truncated.
+     */
+    static Protos.AdvertisementData parse(byte[] rawData) {
+        ByteBuffer data = ByteBuffer.wrap(rawData).asReadOnlyBuffer().order(ByteOrder.LITTLE_ENDIAN);
+        Protos.AdvertisementData.Builder ret = Protos.AdvertisementData.newBuilder();
+        boolean seenLongLocalName = false;
+        do {
+            int length = data.get() & 0xFF;
+            if (length == 0) {
+                break;
+            }
+            if (length > data.remaining()) {
+                throw new ArrayIndexOutOfBoundsException("Not enough data.");
+            }
+
+            int type = data.get() & 0xFF;
+            length--;
+
+            switch (type) {
+                case 0x08: // Short local name.
+                case 0x09: { // Long local name.
+                    if (seenLongLocalName) {
+                        // Prefer the long name over the short.
+                        data.position(data.position() + length);
+                        break;
+                    }
+                    byte[] name = new byte[length];
+                    data.get(name);
+                    ret.setLocalName(new String(name, StandardCharsets.UTF_8));
+                    if (type == 0x09) {
+                        seenLongLocalName = true;
+                    }
+                    break;
+                }
+                case 0x0A: { // Power level.
+                    ret.setTxPowerLevel(Protos.Int32Value.newBuilder().setValue(data.get()));
+                    break;
+                }
+                case 0x16: // Service Data with 16 bit UUID.
+                case 0x20: // Service Data with 32 bit UUID.
+                case 0x21: { // Service Data with 128 bit UUID.
+                    UUID uuid;
+                    int remainingDataLength = 0;
+                    if (type == 0x16 || type == 0x20) {
+                        long uuidValue;
+                        if (type == 0x16) {
+                            uuidValue = data.getShort() & 0xFFFF;
+                            remainingDataLength = length - 2;
+                        } else {
+                            uuidValue = data.getInt() & 0xFFFFFFFF;
+                            remainingDataLength = length - 4;
+                        }
+                        uuid = UUID.fromString(String.format("%08x-0000-1000-8000-00805f9b34fb", uuidValue));
+                    } else {
+                        long msb = data.getLong();
+                        long lsb = data.getLong();
+                        uuid = new UUID(msb, lsb);
+                        remainingDataLength = length - 16;
+                    }
+                    byte[] remainingData = new byte[remainingDataLength];
+                    data.get(remainingData);
+                    ret.putServiceData(uuid.toString(), ByteString.copyFrom(remainingData));
+                    break;
+                }
+                case 0xFF: {// Manufacturer specific data.
+                    if (length < 2) {
+                        throw new ArrayIndexOutOfBoundsException("Not enough data for Manufacturer specific data.");
+                    }
+                    int manufacturerId = data.getShort();
+                    if ((length - 2) > 0) {
+                        byte[] msd = new byte[length - 2];
+                        data.get(msd);
+                        ret.putManufacturerData(manufacturerId, ByteString.copyFrom(msd));
+                    }
+                    break;
+                }
+                default: {
+                    data.position(data.position() + length);
+                    break;
+                }
+            }
+        } while (true);
+        return ret.build();
+    }
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/android/src/main/java/ai/longev/flutter/flutter_ble/FlutterBlePlugin.java

@@ -0,0 +1,884 @@
+package ai.longev.flutter.flutter_ble;
+
+// Copyright 2017, Paul DeMarco.
+// All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import android.Manifest;
+import android.annotation.TargetApi;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCallback;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattService;
+import android.bluetooth.BluetoothManager;
+import android.bluetooth.BluetoothProfile;
+import android.bluetooth.le.BluetoothLeScanner;
+import android.bluetooth.le.ScanCallback;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanResult;
+import android.bluetooth.le.ScanSettings;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.ParcelUuid;
+import android.util.Log;
+
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+import io.flutter.plugin.common.EventChannel;
+import io.flutter.plugin.common.EventChannel.EventSink;
+import io.flutter.plugin.common.EventChannel.StreamHandler;
+import io.flutter.plugin.common.MethodCall;
+import io.flutter.plugin.common.MethodChannel;
+import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
+import io.flutter.plugin.common.MethodChannel.Result;
+import io.flutter.plugin.common.PluginRegistry.Registrar;
+import io.flutter.plugin.common.PluginRegistry.RequestPermissionsResultListener;
+
+
+/**
+ * FlutterBlePlugin
+ */
+public class FlutterBlePlugin implements MethodCallHandler, RequestPermissionsResultListener {
+    private static final String TAG = "FlutterBlePlugin";
+    private static final String NAMESPACE = "ai.longev.flutter/flutter_ble";
+    private static final int REQUEST_COARSE_LOCATION_PERMISSIONS = 1452;
+    static final private UUID CCCD_ID = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb");
+    private final Registrar registrar;
+    private final MethodChannel channel;
+    private final EventChannel stateChannel;
+    private final EventChannel scanResultChannel;
+    private final EventChannel servicesDiscoveredChannel;
+    private final EventChannel characteristicReadChannel;
+    private final EventChannel descriptorReadChannel;
+    private final BluetoothManager mBluetoothManager;
+    private final Map<String, BluetoothGatt> mGattServers = new HashMap<>();
+    private final StreamHandler stateHandler = new StreamHandler() {
+        private EventSink sink;
+
+        private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                final String action = intent.getAction();
+
+                if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {
+                    final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE,
+                            BluetoothAdapter.ERROR);
+                    switch (state) {
+                        case BluetoothAdapter.STATE_OFF:
+                            sink.success(Protos.BluetoothState.newBuilder().setState(Protos.BluetoothState.State.OFF).build().toByteArray());
+                            break;
+                        case BluetoothAdapter.STATE_TURNING_OFF:
+                            sink.success(Protos.BluetoothState.newBuilder().setState(Protos.BluetoothState.State.TURNING_OFF).build().toByteArray());
+                            break;
+                        case BluetoothAdapter.STATE_ON:
+                            sink.success(Protos.BluetoothState.newBuilder().setState(Protos.BluetoothState.State.ON).build().toByteArray());
+                            break;
+                        case BluetoothAdapter.STATE_TURNING_ON:
+                            sink.success(Protos.BluetoothState.newBuilder().setState(Protos.BluetoothState.State.TURNING_ON).build().toByteArray());
+                            break;
+                    }
+                }
+            }
+        };
+
+        @Override
+        public void onListen(Object o, EventChannel.EventSink eventSink) {
+            sink = eventSink;
+            IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
+            registrar.activity().registerReceiver(mReceiver, filter);
+        }
+
+        @Override
+        public void onCancel(Object o) {
+            sink = null;
+            registrar.activity().unregisterReceiver(mReceiver);
+        }
+    };
+    private BluetoothAdapter mBluetoothAdapter;
+    private LogLevel logLevel = LogLevel.EMERGENCY;
+    // Pending call and result for startScan, in the case where permissions are needed
+    private MethodCall pendingCall;
+    private Result pendingResult;
+    private ScanCallback scanCallback21;
+    private BluetoothAdapter.LeScanCallback scanCallback18;
+    private EventSink scanResultsSink;
+    private final StreamHandler scanResultsHandler = new StreamHandler() {
+        @Override
+        public void onListen(Object o, EventChannel.EventSink eventSink) {
+            scanResultsSink = eventSink;
+        }
+
+        @Override
+        public void onCancel(Object o) {
+            scanResultsSink = null;
+        }
+    };
+    private EventSink servicesDiscoveredSink;
+    private final StreamHandler servicesDiscoveredHandler = new StreamHandler() {
+        @Override
+        public void onListen(Object o, EventChannel.EventSink eventSink) {
+            servicesDiscoveredSink = eventSink;
+        }
+
+        @Override
+        public void onCancel(Object o) {
+            servicesDiscoveredSink = null;
+        }
+    };
+    private EventSink characteristicReadSink;
+    private final StreamHandler characteristicReadHandler = new StreamHandler() {
+        @Override
+        public void onListen(Object o, EventChannel.EventSink eventSink) {
+            characteristicReadSink = eventSink;
+        }
+
+        @Override
+        public void onCancel(Object o) {
+            characteristicReadSink = null;
+        }
+    };
+    private EventSink descriptorReadSink;
+    private final StreamHandler descriptorReadHandler = new StreamHandler() {
+        @Override
+        public void onListen(Object o, EventChannel.EventSink eventSink) {
+            descriptorReadSink = eventSink;
+        }
+
+        @Override
+        public void onCancel(Object o) {
+            descriptorReadSink = null;
+        }
+    };
+    private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
+        @Override
+        public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
+            log(LogLevel.DEBUG, "[onConnectionStateChange] status: " + status + " newState: " + newState);
+            channel.invokeMethod("DeviceState", ProtoMaker.from(gatt.getDevice(), newState).toByteArray());
+        }
+
+        @Override
+        public void onServicesDiscovered(BluetoothGatt gatt, int status) {
+            log(LogLevel.DEBUG, "[onServicesDiscovered] count: " + gatt.getServices().size() + " status: " + status);
+            if (servicesDiscoveredSink != null) {
+                Protos.DiscoverServicesResult.Builder p = Protos.DiscoverServicesResult.newBuilder();
+                p.setRemoteId(gatt.getDevice().getAddress());
+                for (BluetoothGattService s : gatt.getServices()) {
+                    p.addServices(ProtoMaker.from(gatt.getDevice(), s, gatt));
+                }
+                servicesDiscoveredSink.success(p.build().toByteArray());
+            }
+        }
+
+        @Override
+        public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
+            log(LogLevel.DEBUG, "[onCharacteristicRead] uuid: " + characteristic.getUuid().toString() + " status: " + status);
+            if (characteristicReadSink != null) {
+                Protos.ReadCharacteristicResponse.Builder p = Protos.ReadCharacteristicResponse.newBuilder();
+                p.setRemoteId(gatt.getDevice().getAddress());
+                p.setCharacteristic(ProtoMaker.from(characteristic, gatt));
+                characteristicReadSink.success(p.build().toByteArray());
+            }
+        }
+
+        @Override
+        public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
+            log(LogLevel.DEBUG, "[onCharacteristicWrite] uuid: " + characteristic.getUuid().toString() + " status: " + status);
+            Protos.WriteCharacteristicRequest.Builder request = Protos.WriteCharacteristicRequest.newBuilder();
+            request.setRemoteId(gatt.getDevice().getAddress());
+            request.setCharacteristicUuid(characteristic.getUuid().toString());
+            request.setServiceUuid(characteristic.getService().getUuid().toString());
+            Protos.WriteCharacteristicResponse.Builder p = Protos.WriteCharacteristicResponse.newBuilder();
+            p.setRequest(request);
+            p.setSuccess(status == BluetoothGatt.GATT_SUCCESS);
+            channel.invokeMethod("WriteCharacteristicResponse", p.build().toByteArray());
+        }
+
+        @Override
+        public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
+            log(LogLevel.DEBUG, "[onCharacteristicChanged] uuid: " + characteristic.getUuid().toString());
+            Protos.OnNotificationResponse.Builder p = Protos.OnNotificationResponse.newBuilder();
+            p.setRemoteId(gatt.getDevice().getAddress());
+            p.setCharacteristic(ProtoMaker.from(characteristic, gatt));
+            channel.invokeMethod("OnValueChanged", p.build().toByteArray());
+        }
+
+        @Override
+        public void onDescriptorRead(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {
+            log(LogLevel.DEBUG, "[onDescriptorRead] uuid: " + descriptor.getUuid().toString() + " status: " + status);
+            if (descriptorReadSink != null) {
+                // Rebuild the ReadAttributeRequest and send back along with response
+                Protos.ReadDescriptorRequest.Builder q = Protos.ReadDescriptorRequest.newBuilder();
+                q.setRemoteId(gatt.getDevice().getAddress());
+                q.setCharacteristicUuid(descriptor.getCharacteristic().getUuid().toString());
+                q.setDescriptorUuid(descriptor.getUuid().toString());
+                if (descriptor.getCharacteristic().getService().getType() == BluetoothGattService.SERVICE_TYPE_PRIMARY) {
+                    q.setServiceUuid(descriptor.getCharacteristic().getService().getUuid().toString());
+                } else {
+                    // Reverse search to find service
+                    for (BluetoothGattService s : gatt.getServices()) {
+                        for (BluetoothGattService ss : s.getIncludedServices()) {
+                            if (ss.getUuid().equals(descriptor.getCharacteristic().getService().getUuid())) {
+                                q.setServiceUuid(s.getUuid().toString());
+                                q.setSecondaryServiceUuid(ss.getUuid().toString());
+                                break;
+                            }
+                        }
+                    }
+                }
+                Protos.ReadDescriptorResponse.Builder p = Protos.ReadDescriptorResponse.newBuilder();
+                p.setRequest(q);
+                p.setValue(ByteString.copyFrom(descriptor.getValue()));
+                descriptorReadSink.success(p.build().toByteArray());
+            }
+
+        }
+
+        @Override
+        public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {
+            log(LogLevel.DEBUG, "[onDescriptorWrite] uuid: " + descriptor.getUuid().toString() + " status: " + status);
+            Protos.WriteDescriptorRequest.Builder request = Protos.WriteDescriptorRequest.newBuilder();
+            request.setRemoteId(gatt.getDevice().getAddress());
+            request.setDescriptorUuid(descriptor.getUuid().toString());
+            request.setCharacteristicUuid(descriptor.getCharacteristic().getUuid().toString());
+            request.setServiceUuid(descriptor.getCharacteristic().getService().getUuid().toString());
+            Protos.WriteDescriptorResponse.Builder p = Protos.WriteDescriptorResponse.newBuilder();
+            p.setRequest(request);
+            p.setSuccess(status == BluetoothGatt.GATT_SUCCESS);
+            channel.invokeMethod("WriteDescriptorResponse", p.build().toByteArray());
+
+            if (descriptor.getUuid().compareTo(CCCD_ID) == 0) {
+                // SetNotificationResponse
+                Protos.SetNotificationResponse.Builder q = Protos.SetNotificationResponse.newBuilder();
+                q.setRemoteId(gatt.getDevice().getAddress());
+                q.setCharacteristic(ProtoMaker.from(descriptor.getCharacteristic(), gatt));
+                channel.invokeMethod("SetNotificationResponse", q.build().toByteArray());
+            }
+        }
+
+        @Override
+        public void onReliableWriteCompleted(BluetoothGatt gatt, int status) {
+            log(LogLevel.DEBUG, "[onReliableWriteCompleted] status: " + status);
+        }
+
+        @Override
+        public void onReadRemoteRssi(BluetoothGatt gatt, int rssi, int status) {
+            log(LogLevel.DEBUG, "[onReadRemoteRssi] rssi: " + rssi + " status: " + status);
+        }
+
+        @Override
+        public void onMtuChanged(BluetoothGatt gatt, int mtu, int status) {
+            log(LogLevel.DEBUG, "[onMtuChanged] mtu: " + mtu + " status: " + status);
+        }
+    };
+
+    FlutterBlePlugin(Registrar r) {
+        this.registrar = r;
+        this.channel = new MethodChannel(registrar.messenger(), NAMESPACE + "/methods");
+        this.stateChannel = new EventChannel(registrar.messenger(), NAMESPACE + "/state");
+        this.scanResultChannel = new EventChannel(registrar.messenger(), NAMESPACE + "/scanResult");
+        this.servicesDiscoveredChannel = new EventChannel(registrar.messenger(), NAMESPACE + "/servicesDiscovered");
+        this.characteristicReadChannel = new EventChannel(registrar.messenger(), NAMESPACE + "/characteristicRead");
+        this.descriptorReadChannel = new EventChannel(registrar.messenger(), NAMESPACE + "/descriptorRead");
+        this.mBluetoothManager = (BluetoothManager) r.activity().getSystemService(Context.BLUETOOTH_SERVICE);
+        this.mBluetoothAdapter = mBluetoothManager.getAdapter();
+        channel.setMethodCallHandler(this);
+        stateChannel.setStreamHandler(stateHandler);
+        scanResultChannel.setStreamHandler(scanResultsHandler);
+        servicesDiscoveredChannel.setStreamHandler(servicesDiscoveredHandler);
+        characteristicReadChannel.setStreamHandler(characteristicReadHandler);
+        descriptorReadChannel.setStreamHandler(descriptorReadHandler);
+    }
+
+    /**
+     * Plugin registration.
+     */
+    public static void registerWith(Registrar registrar) {
+        final FlutterBlePlugin instance = new FlutterBlePlugin(registrar);
+        registrar.addRequestPermissionsResultListener(instance);
+    }
+
+    @Override
+    public void onMethodCall(MethodCall call, Result result) {
+        if (mBluetoothAdapter == null && !"isAvailable".equals(call.method)) {
+            result.error("bluetooth_unavailable", "the device does not have bluetooth", null);
+            return;
+        }
+
+        switch (call.method) {
+            case "setLogLevel": {
+                int logLevelIndex = (int) call.arguments;
+                logLevel = LogLevel.values()[logLevelIndex];
+                result.success(null);
+                break;
+            }
+
+            case "state": {
+                Protos.BluetoothState.Builder p = Protos.BluetoothState.newBuilder();
+                try {
+                    switch (mBluetoothAdapter.getState()) {
+                        case BluetoothAdapter.STATE_OFF:
+                            p.setState(Protos.BluetoothState.State.OFF);
+                            break;
+                        case BluetoothAdapter.STATE_ON:
+                            p.setState(Protos.BluetoothState.State.ON);
+                            break;
+                        case BluetoothAdapter.STATE_TURNING_OFF:
+                            p.setState(Protos.BluetoothState.State.TURNING_OFF);
+                            break;
+                        case BluetoothAdapter.STATE_TURNING_ON:
+                            p.setState(Protos.BluetoothState.State.TURNING_ON);
+                            break;
+                        default:
+                            p.setState(Protos.BluetoothState.State.UNKNOWN);
+                            break;
+                    }
+                } catch (SecurityException e) {
+                    p.setState(Protos.BluetoothState.State.UNAUTHORIZED);
+                }
+                result.success(p.build().toByteArray());
+                break;
+            }
+
+            case "isAvailable": {
+                result.success(mBluetoothAdapter != null);
+                break;
+            }
+
+            case "isOn": {
+                result.success(mBluetoothAdapter.isEnabled());
+                break;
+            }
+
+            case "startScan": {
+                if (ContextCompat.checkSelfPermission(registrar.activity(), Manifest.permission.ACCESS_COARSE_LOCATION)
+                        != PackageManager.PERMISSION_GRANTED) {
+                    ActivityCompat.requestPermissions(
+                            registrar.activity(),
+                            new String[]{
+                                    Manifest.permission.ACCESS_COARSE_LOCATION
+                            },
+                            REQUEST_COARSE_LOCATION_PERMISSIONS);
+                    pendingCall = call;
+                    pendingResult = result;
+                    break;
+                }
+                startScan(call, result);
+                break;
+            }
+
+            case "stopScan": {
+                stopScan();
+                result.success(null);
+                break;
+            }
+
+            case "connect": {
+                byte[] data = call.arguments();
+                Protos.ConnectRequest options;
+                try {
+                    options = Protos.ConnectRequest.newBuilder().mergeFrom(data).build();
+                } catch (InvalidProtocolBufferException e) {
+                    result.error("RuntimeException", e.getMessage(), e);
+                    break;
+                }
+                String deviceId = options.getRemoteId();
+                BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(deviceId);
+                boolean isConnected = mBluetoothManager.getConnectedDevices(BluetoothProfile.GATT).contains(device);
+
+                // If device is already connected, return error
+                if (mGattServers.containsKey(deviceId) && isConnected) {
+                    result.error("already_connected", "connection with device already exists", null);
+                    return;
+                }
+
+                // If device was connected to previously but is now disconnected, attempt a reconnect
+                if (mGattServers.containsKey(deviceId) && !isConnected) {
+                    if (!mGattServers.get(deviceId).connect()) {
+                        result.error("reconnect_error", "error when reconnecting to device", null);
+                        return;
+                    }
+                }
+
+                // New request, connect and add gattServer to Map
+                BluetoothGatt gattServer = device.connectGatt(registrar.activity(), options.getAndroidAutoConnect(), mGattCallback);
+                mGattServers.put(deviceId, gattServer);
+                result.success(null);
+                break;
+            }
+
+            case "createBond": {
+                byte[] data = call.arguments();
+                Protos.ConnectRequest options;
+                try {
+                    options = Protos.ConnectRequest.newBuilder().mergeFrom(data).build();
+                } catch (InvalidProtocolBufferException e) {
+                    result.error("RuntimeException", e.getMessage(), e);
+                    break;
+                }
+                String deviceId = options.getRemoteId();
+                BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(deviceId);
+                boolean isConnected = mBluetoothManager.getConnectedDevices(BluetoothProfile.GATT).contains(device);
+                if (mGattServers.containsKey(deviceId) && !isConnected) {
+                    if (device.createBond()) {
+                        result.success(null);
+                    } else {
+                        result.error(" bond error", "create bond error", null);
+                    }
+                }
+                return;
+            }
+
+            case "disconnect": {
+                String deviceId = (String) call.arguments;
+                BluetoothGatt gattServer = mGattServers.remove(deviceId);
+                if (gattServer != null) {
+                    gattServer.close();
+                }
+                result.success(null);
+                break;
+            }
+
+            case "deviceState": {
+                String deviceId = (String) call.arguments;
+                BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(deviceId);
+                int state = mBluetoothManager.getConnectionState(device, BluetoothProfile.GATT);
+                try {
+                    result.success(ProtoMaker.from(device, state).toByteArray());
+                } catch (Exception e) {
+                    result.error("device_state_error", e.getMessage(), null);
+                }
+                break;
+            }
+
+            case "discoverServices": {
+                String deviceId = (String) call.arguments;
+                BluetoothGatt gattServer = mGattServers.get(deviceId);
+                if (gattServer == null) {
+                    result.error("discover_services_error", "no instance of BluetoothGatt, have you connected first?", null);
+                    return;
+                }
+                if (gattServer.discoverServices()) {
+                    result.success(null);
+                } else {
+                    result.error("discover_services_error", "unknown reason", null);
+                }
+                break;
+            }
+
+            case "services": {
+                String deviceId = (String) call.arguments;
+                BluetoothGatt gattServer = mGattServers.get(deviceId);
+                if (gattServer == null) {
+                    result.error("get_services_error", "no instance of BluetoothGatt, have you connected first?", null);
+                    return;
+                }
+                if (gattServer.getServices().isEmpty()) {
+                    result.error("get_services_error", "services are empty, have you called discoverServices() yet?", null);
+                    return;
+                }
+                Protos.DiscoverServicesResult.Builder p = Protos.DiscoverServicesResult.newBuilder();
+                p.setRemoteId(deviceId);
+                for (BluetoothGattService s : gattServer.getServices()) {
+                    p.addServices(ProtoMaker.from(gattServer.getDevice(), s, gattServer));
+                }
+                result.success(p.build().toByteArray());
+                break;
+            }
+
+            case "readCharacteristic": {
+                byte[] data = call.arguments();
+                Protos.ReadCharacteristicRequest request;
+                try {
+                    request = Protos.ReadCharacteristicRequest.newBuilder().mergeFrom(data).build();
+                } catch (InvalidProtocolBufferException e) {
+                    result.error("RuntimeException", e.getMessage(), e);
+                    break;
+                }
+
+                BluetoothGatt gattServer;
+                BluetoothGattCharacteristic characteristic;
+                try {
+                    gattServer = locateGatt(request.getRemoteId());
+                    characteristic = locateCharacteristic(gattServer, request.getServiceUuid(), request.getSecondaryServiceUuid(), request.getCharacteristicUuid());
+                } catch (Exception e) {
+                    result.error("read_characteristic_error", e.getMessage(), null);
+                    return;
+                }
+
+                if (gattServer.readCharacteristic(characteristic)) {
+                    result.success(null);
+                } else {
+                    result.error("read_characteristic_error", "unknown reason, may occur if readCharacteristic was called before last read finished.", null);
+                }
+                break;
+            }
+
+            case "readDescriptor": {
+                byte[] data = call.arguments();
+                Protos.ReadDescriptorRequest request;
+                try {
+                    request = Protos.ReadDescriptorRequest.newBuilder().mergeFrom(data).build();
+                } catch (InvalidProtocolBufferException e) {
+                    result.error("RuntimeException", e.getMessage(), e);
+                    break;
+                }
+
+                BluetoothGatt gattServer;
+                BluetoothGattCharacteristic characteristic;
+                BluetoothGattDescriptor descriptor;
+                try {
+                    gattServer = locateGatt(request.getRemoteId());
+                    characteristic = locateCharacteristic(gattServer, request.getServiceUuid(), request.getSecondaryServiceUuid(), request.getCharacteristicUuid());
+                    descriptor = locateDescriptor(characteristic, request.getDescriptorUuid());
+                } catch (Exception e) {
+                    result.error("read_descriptor_error", e.getMessage(), null);
+                    return;
+                }
+
+                if (gattServer.readDescriptor(descriptor)) {
+                    result.success(null);
+                } else {
+                    result.error("read_descriptor_error", "unknown reason, may occur if readDescriptor was called before last read finished.", null);
+                }
+                break;
+            }
+
+            case "writeCharacteristic": {
+                byte[] data = call.arguments();
+                Protos.WriteCharacteristicRequest request;
+                try {
+                    request = Protos.WriteCharacteristicRequest.newBuilder().mergeFrom(data).build();
+                } catch (InvalidProtocolBufferException e) {
+                    result.error("RuntimeException", e.getMessage(), e);
+                    break;
+                }
+
+                BluetoothGatt gattServer;
+                BluetoothGattCharacteristic characteristic;
+                try {
+                    gattServer = locateGatt(request.getRemoteId());
+                    characteristic = locateCharacteristic(gattServer, request.getServiceUuid(), request.getSecondaryServiceUuid(), request.getCharacteristicUuid());
+                } catch (Exception e) {
+                    result.error("write_characteristic_error", e.getMessage(), null);
+                    return;
+                }
+
+                // Set characteristic to new value
+                if (!characteristic.setValue(request.getValue().toByteArray())) {
+                    result.error("write_characteristic_error", "could not set the local value of characteristic", null);
+                }
+
+                // Apply the correct write type
+                if (request.getWriteType() == Protos.WriteCharacteristicRequest.WriteType.WITHOUT_RESPONSE) {
+                    characteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE);
+                } else {
+                    characteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT);
+                }
+
+                if (!gattServer.writeCharacteristic(characteristic)) {
+                    result.error("write_characteristic_error", "writeCharacteristic failed", null);
+                    return;
+                }
+
+                result.success(null);
+                break;
+            }
+
+            case "writeDescriptor": {
+                byte[] data = call.arguments();
+                Protos.WriteDescriptorRequest request;
+                try {
+                    request = Protos.WriteDescriptorRequest.newBuilder().mergeFrom(data).build();
+                } catch (InvalidProtocolBufferException e) {
+                    result.error("RuntimeException", e.getMessage(), e);
+                    break;
+                }
+
+                BluetoothGatt gattServer;
+                BluetoothGattCharacteristic characteristic;
+                BluetoothGattDescriptor descriptor;
+                try {
+                    gattServer = locateGatt(request.getRemoteId());
+                    characteristic = locateCharacteristic(gattServer, request.getServiceUuid(), request.getSecondaryServiceUuid(), request.getCharacteristicUuid());
+                    descriptor = locateDescriptor(characteristic, request.getDescriptorUuid());
+                } catch (Exception e) {
+                    result.error("write_descriptor_error", e.getMessage(), null);
+                    return;
+                }
+
+                // Set descriptor to new value
+                if (!descriptor.setValue(request.getValue().toByteArray())) {
+                    result.error("write_descriptor_error", "could not set the local value for descriptor", null);
+                }
+
+                if (!gattServer.writeDescriptor(descriptor)) {
+                    result.error("write_descriptor_error", "writeCharacteristic failed", null);
+                    return;
+                }
+
+                result.success(null);
+                break;
+            }
+
+            case "setNotification": {
+                byte[] data = call.arguments();
+                Protos.SetNotificationRequest request;
+                try {
+                    request = Protos.SetNotificationRequest.newBuilder().mergeFrom(data).build();
+                } catch (InvalidProtocolBufferException e) {
+                    result.error("RuntimeException", e.getMessage(), e);
+                    break;
+                }
+
+                BluetoothGatt gattServer;
+                BluetoothGattCharacteristic characteristic;
+                BluetoothGattDescriptor cccDescriptor;
+                try {
+                    gattServer = locateGatt(request.getRemoteId());
+                    characteristic = locateCharacteristic(gattServer, request.getServiceUuid(), request.getSecondaryServiceUuid(), request.getCharacteristicUuid());
+                    cccDescriptor = characteristic.getDescriptor(CCCD_ID);
+                    if (cccDescriptor == null) {
+                        throw new Exception("could not locate CCCD descriptor for characteristic: " + characteristic.getUuid().toString());
+                    }
+                } catch (Exception e) {
+                    result.error("set_notification_error", e.getMessage(), null);
+                    return;
+                }
+
+                byte[] value = null;
+
+                if (request.getEnable()) {
+                    boolean canNotify = (characteristic.getProperties() & BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0;
+                    boolean canIndicate = (characteristic.getProperties() & BluetoothGattCharacteristic.PROPERTY_INDICATE) > 0;
+                    if (!canIndicate && !canNotify) {
+                        result.error("set_notification_error", "the characteristic cannot notify or indicate", null);
+                        return;
+                    }
+                    if (canIndicate) {
+                        value = BluetoothGattDescriptor.ENABLE_INDICATION_VALUE;
+                    }
+                    if (canNotify) {
+                        value = BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE;
+                    }
+                } else {
+                    value = BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE;
+                }
+
+                if (!gattServer.setCharacteristicNotification(characteristic, request.getEnable())) {
+                    result.error("set_notification_error", "could not set characteristic notifications to :" + request.getEnable(), null);
+                    return;
+                }
+
+                if (!cccDescriptor.setValue(value)) {
+                    result.error("set_notification_error", "error when setting the descriptor value to: " + value, null);
+                    return;
+                }
+
+                if (!gattServer.writeDescriptor(cccDescriptor)) {
+                    result.error("set_notification_error", "error when writing the descriptor", null);
+                    return;
+                }
+
+                result.success(null);
+                break;
+            }
+
+            default: {
+                result.notImplemented();
+                break;
+            }
+        }
+    }
+
+    @Override
+    public boolean onRequestPermissionsResult(
+            int requestCode, String[] permissions, int[] grantResults) {
+        if (requestCode == REQUEST_COARSE_LOCATION_PERMISSIONS) {
+            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                startScan(pendingCall, pendingResult);
+            } else {
+                pendingResult.error(
+                        "no_permissions", "flutter_blue plugin requires location permissions for scanning", null);
+                pendingResult = null;
+                pendingCall = null;
+            }
+            return true;
+        }
+        return false;
+    }
+
+    private BluetoothGatt locateGatt(String remoteId) throws Exception {
+        BluetoothGatt gattServer = mGattServers.get(remoteId);
+        if (gattServer == null) {
+            throw new Exception("no instance of BluetoothGatt, have you connected first?");
+        }
+        return gattServer;
+    }
+
+    private BluetoothGattCharacteristic locateCharacteristic(BluetoothGatt gattServer, String serviceId, String secondaryServiceId, String characteristicId) throws Exception {
+        BluetoothGattService primaryService = gattServer.getService(UUID.fromString(serviceId));
+        if (primaryService == null) {
+            throw new Exception("service (" + serviceId + ") could not be located on the device");
+        }
+        BluetoothGattService secondaryService = null;
+        if (secondaryServiceId.length() > 0) {
+            for (BluetoothGattService s : primaryService.getIncludedServices()) {
+                if (s.getUuid().equals(UUID.fromString(secondaryServiceId))) {
+                    secondaryService = s;
+                }
+            }
+            if (secondaryService == null) {
+                throw new Exception("secondary service (" + secondaryServiceId + ") could not be located on the device");
+            }
+        }
+        BluetoothGattService service = (secondaryService != null) ? secondaryService : primaryService;
+        BluetoothGattCharacteristic characteristic = service.getCharacteristic(UUID.fromString(characteristicId));
+        if (characteristic == null) {
+            throw new Exception("characteristic (" + characteristicId + ") could not be located in the service (" + service.getUuid().toString() + ")");
+        }
+        return characteristic;
+    }
+
+    private BluetoothGattDescriptor locateDescriptor(BluetoothGattCharacteristic characteristic, String descriptorId) throws Exception {
+        BluetoothGattDescriptor descriptor = characteristic.getDescriptor(UUID.fromString(descriptorId));
+        if (descriptor == null) {
+            throw new Exception("descriptor (" + descriptorId + ") could not be located in the characteristic (" + characteristic.getUuid().toString() + ")");
+        }
+        return descriptor;
+    }
+
+    private void startScan(MethodCall call, Result result) {
+        byte[] data = call.arguments();
+        Protos.ScanSettings settings;
+        try {
+            settings = Protos.ScanSettings.newBuilder().mergeFrom(data).build();
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+                startScan21(settings);
+            } else {
+                startScan18(settings);
+            }
+            result.success(null);
+        } catch (Exception e) {
+            result.error("startScan", e.getMessage(), e);
+        }
+    }
+
+    private void stopScan() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            stopScan21();
+        } else {
+            stopScan18();
+        }
+    }
+
+    @TargetApi(21)
+    private ScanCallback getScanCallback21() {
+        if (scanCallback21 == null) {
+            scanCallback21 = new ScanCallback() {
+
+                @Override
+                public void onScanResult(int callbackType, ScanResult result) {
+                    super.onScanResult(callbackType, result);
+                    if (scanResultsSink != null) {
+                        Protos.ScanResult scanResult = ProtoMaker.from(result.getDevice(), result);
+                        scanResultsSink.success(scanResult.toByteArray());
+                    }
+                }
+
+                @Override
+                public void onBatchScanResults(List<ScanResult> results) {
+                    super.onBatchScanResults(results);
+
+                }
+
+                @Override
+                public void onScanFailed(int errorCode) {
+                    super.onScanFailed(errorCode);
+                }
+            };
+        }
+        return scanCallback21;
+    }
+
+    @TargetApi(21)
+    private void startScan21(Protos.ScanSettings proto) throws IllegalStateException {
+        BluetoothLeScanner scanner = mBluetoothAdapter.getBluetoothLeScanner();
+        if (scanner == null)
+            throw new IllegalStateException("getBluetoothLeScanner() is null. Is the Adapter on?");
+        int scanMode = proto.getAndroidScanMode();
+        int count = proto.getServiceUuidsCount();
+        List<ScanFilter> filters = new ArrayList<>(count);
+        for (int i = 0; i < count; i++) {
+            String uuid = proto.getServiceUuids(i);
+            ScanFilter f = new ScanFilter.Builder().setServiceUuid(ParcelUuid.fromString(uuid)).build();
+            filters.add(f);
+        }
+        ScanSettings settings = new ScanSettings.Builder().setScanMode(scanMode).build();
+        scanner.startScan(filters, settings, getScanCallback21());
+    }
+
+    @TargetApi(21)
+    private void stopScan21() {
+        BluetoothLeScanner scanner = mBluetoothAdapter.getBluetoothLeScanner();
+        if (scanner != null) scanner.stopScan(getScanCallback21());
+    }
+
+    private BluetoothAdapter.LeScanCallback getScanCallback18() {
+        if (scanCallback18 == null) {
+            scanCallback18 = new BluetoothAdapter.LeScanCallback() {
+                @Override
+                public void onLeScan(final BluetoothDevice bluetoothDevice, int rssi,
+                                     byte[] scanRecord) {
+                    if (scanResultsSink != null) {
+                        Protos.ScanResult scanResult = ProtoMaker.from(bluetoothDevice, scanRecord, rssi);
+                        scanResultsSink.success(scanResult.toByteArray());
+                    }
+                }
+            };
+        }
+        return scanCallback18;
+    }
+
+    private void startScan18(Protos.ScanSettings proto) throws IllegalStateException {
+        List<String> serviceUuids = proto.getServiceUuidsList();
+        UUID[] uuids = new UUID[serviceUuids.size()];
+        for (int i = 0; i < serviceUuids.size(); i++) {
+            uuids[i] = UUID.fromString(serviceUuids.get(i));
+        }
+        boolean success = mBluetoothAdapter.startLeScan(uuids, getScanCallback18());
+        if (!success)
+            throw new IllegalStateException("getBluetoothLeScanner() is null. Is the Adapter on?");
+    }
+
+    private void stopScan18() {
+        mBluetoothAdapter.stopLeScan(getScanCallback18());
+    }
+
+    private void log(LogLevel level, String message) {
+        if (level.ordinal() <= logLevel.ordinal()) {
+            Log.d(TAG, message);
+        }
+    }
+
+    enum LogLevel {
+        EMERGENCY, ALERT, CRITICAL, ERROR, WARNING, NOTICE, INFO, DEBUG
+    }
+
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/android/src/main/java/ai/longev/flutter/flutter_ble/ProtoMaker.java

@@ -0,0 +1,205 @@
+package ai.longev.flutter.flutter_ble;
+
+// Copyright 2017, Paul DeMarco.
+// All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+
+import android.annotation.TargetApi;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattService;
+import android.bluetooth.BluetoothProfile;
+import android.bluetooth.le.ScanRecord;
+import android.bluetooth.le.ScanResult;
+import android.os.Build;
+import android.os.ParcelUuid;
+import android.util.SparseArray;
+
+import com.google.protobuf.ByteString;
+
+
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+/**
+ * Created by paul on 8/31/17.
+ */
+
+public class ProtoMaker {
+
+    private static final UUID CCCD_UUID = UUID.fromString("000002902-0000-1000-8000-00805f9b34fb");
+
+    static Protos.ScanResult from(BluetoothDevice device, byte[] advertisementData, int rssi) {
+        Protos.ScanResult.Builder p = Protos.ScanResult.newBuilder();
+        p.setDevice(from(device));
+        if (advertisementData != null && advertisementData.length > 0)
+            p.setAdvertisementData(AdvertisementParser.parse(advertisementData));
+        p.setRssi(rssi);
+        return p.build();
+    }
+
+    @TargetApi(21)
+    static Protos.ScanResult from(BluetoothDevice device, ScanResult scanResult) {
+        Protos.ScanResult.Builder p = Protos.ScanResult.newBuilder();
+        p.setDevice(from(device));
+        Protos.AdvertisementData.Builder a = Protos.AdvertisementData.newBuilder();
+        ScanRecord scanRecord = scanResult.getScanRecord();
+        if (Build.VERSION.SDK_INT >= 26) {
+            a.setConnectable(scanResult.isConnectable());
+        } else {
+            if (scanRecord != null) {
+                int flags = scanRecord.getAdvertiseFlags();
+                a.setConnectable((flags & 0x2) > 0);
+            }
+        }
+        if (scanRecord != null) {
+            String deviceName = scanRecord.getDeviceName();
+            if (deviceName != null) {
+                a.setLocalName(deviceName);
+            }
+            int txPower = scanRecord.getTxPowerLevel();
+            if (txPower != Integer.MIN_VALUE) {
+                a.setTxPowerLevel(Protos.Int32Value.newBuilder().setValue(txPower));
+            }
+            // Manufacturer Specific Data
+            SparseArray<byte[]> msd = scanRecord.getManufacturerSpecificData();
+            for (int i = 0; i < msd.size(); i++) {
+                int key = msd.keyAt(i);
+                byte[] value = msd.valueAt(i);
+                a.putManufacturerData(key, ByteString.copyFrom(value));
+            }
+            // Service Data
+            Map<ParcelUuid, byte[]> serviceData = scanRecord.getServiceData();
+            for (Map.Entry<ParcelUuid, byte[]> entry : serviceData.entrySet()) {
+                ParcelUuid key = entry.getKey();
+                byte[] value = entry.getValue();
+                a.putServiceData(key.getUuid().toString(), ByteString.copyFrom(value));
+            }
+            // Service UUIDs
+            List<ParcelUuid> serviceUuids = scanRecord.getServiceUuids();
+            if (serviceUuids != null) {
+                for (ParcelUuid s : serviceUuids) {
+                    a.addServiceUuids(s.getUuid().toString());
+                }
+            }
+        }
+        p.setRssi(scanResult.getRssi());
+        p.setAdvertisementData(a.build());
+        return p.build();
+    }
+
+    static Protos.BluetoothDevice from(BluetoothDevice device) {
+        Protos.BluetoothDevice.Builder p = Protos.BluetoothDevice.newBuilder();
+        p.setRemoteId(device.getAddress());
+        String name = device.getName();
+        if (name != null) {
+            p.setName(name);
+        }
+        switch (device.getType()) {
+            case BluetoothDevice.DEVICE_TYPE_LE:
+                p.setType(Protos.BluetoothDevice.Type.LE);
+                break;
+            case BluetoothDevice.DEVICE_TYPE_CLASSIC:
+                p.setType(Protos.BluetoothDevice.Type.CLASSIC);
+                break;
+            case BluetoothDevice.DEVICE_TYPE_DUAL:
+                p.setType(Protos.BluetoothDevice.Type.DUAL);
+                break;
+            default:
+                p.setType(Protos.BluetoothDevice.Type.UNKNOWN);
+                break;
+        }
+        return p.build();
+    }
+
+    static Protos.BluetoothService from(BluetoothDevice device, BluetoothGattService service, BluetoothGatt gatt) {
+        Protos.BluetoothService.Builder p = Protos.BluetoothService.newBuilder();
+        p.setRemoteId(device.getAddress());
+        p.setUuid(service.getUuid().toString());
+        p.setIsPrimary(service.getType() == BluetoothGattService.SERVICE_TYPE_PRIMARY);
+        for (BluetoothGattCharacteristic c : service.getCharacteristics()) {
+            p.addCharacteristics(from(c, gatt));
+        }
+        for (BluetoothGattService s : service.getIncludedServices()) {
+            p.addIncludedServices(from(device, s, gatt));
+        }
+        return p.build();
+    }
+
+    static Protos.BluetoothCharacteristic from(BluetoothGattCharacteristic characteristic, BluetoothGatt gatt) {
+        Protos.BluetoothCharacteristic.Builder p = Protos.BluetoothCharacteristic.newBuilder();
+        p.setUuid(characteristic.getUuid().toString());
+        p.setProperties(from(characteristic.getProperties()));
+        if (characteristic.getValue() != null)
+            p.setValue(ByteString.copyFrom(characteristic.getValue()));
+        for (BluetoothGattDescriptor d : characteristic.getDescriptors()) {
+            p.addDescriptors(from(d));
+        }
+        if (characteristic.getService().getType() == BluetoothGattService.SERVICE_TYPE_PRIMARY) {
+            p.setServiceUuid(characteristic.getService().getUuid().toString());
+        } else {
+            // Reverse search to find service
+            for (BluetoothGattService s : gatt.getServices()) {
+                for (BluetoothGattService ss : s.getIncludedServices()) {
+                    if (ss.getUuid().equals(characteristic.getService().getUuid())) {
+                        p.setServiceUuid(s.getUuid().toString());
+                        p.setSecondaryServiceUuid(ss.getUuid().toString());
+                        break;
+                    }
+                }
+            }
+        }
+        return p.build();
+    }
+
+    static Protos.BluetoothDescriptor from(BluetoothGattDescriptor descriptor) {
+        Protos.BluetoothDescriptor.Builder p = Protos.BluetoothDescriptor.newBuilder();
+        p.setUuid(descriptor.getUuid().toString());
+        p.setCharacteristicUuid(descriptor.getCharacteristic().getUuid().toString());
+        p.setServiceUuid(descriptor.getCharacteristic().getService().getUuid().toString());
+        if (descriptor.getValue() != null)
+            p.setValue(ByteString.copyFrom(descriptor.getValue()));
+        return p.build();
+    }
+
+    static Protos.CharacteristicProperties from(int properties) {
+        return Protos.CharacteristicProperties.newBuilder()
+                .setBroadcast((properties & 1) != 0)
+                .setRead((properties & 2) != 0)
+                .setWriteWithoutResponse((properties & 4) != 0)
+                .setWrite((properties & 8) != 0)
+                .setNotify((properties & 16) != 0)
+                .setIndicate((properties & 32) != 0)
+                .setAuthenticatedSignedWrites((properties & 64) != 0)
+                .setExtendedProperties((properties & 128) != 0)
+                .setNotifyEncryptionRequired((properties & 256) != 0)
+                .setIndicateEncryptionRequired((properties & 512) != 0)
+                .build();
+    }
+
+    static Protos.DeviceStateResponse from(BluetoothDevice device, int state) {
+        Protos.DeviceStateResponse.Builder p = Protos.DeviceStateResponse.newBuilder();
+        switch (state) {
+            case BluetoothProfile.STATE_DISCONNECTING:
+                p.setState(Protos.DeviceStateResponse.BluetoothDeviceState.DISCONNECTING);
+                break;
+            case BluetoothProfile.STATE_CONNECTED:
+                p.setState(Protos.DeviceStateResponse.BluetoothDeviceState.CONNECTED);
+                break;
+            case BluetoothProfile.STATE_CONNECTING:
+                p.setState(Protos.DeviceStateResponse.BluetoothDeviceState.CONNECTING);
+                break;
+            case BluetoothProfile.STATE_DISCONNECTED:
+                p.setState(Protos.DeviceStateResponse.BluetoothDeviceState.DISCONNECTED);
+                break;
+            default:
+                break;
+        }
+        p.setRemoteId(device.getAddress());
+        return p.build();
+    }
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/.gitignore

@@ -0,0 +1,70 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# Visual Studio Code related
+.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+.dart_tool/
+.flutter-plugins
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Android related
+**/android/**/gradle-wrapper.jar
+**/android/.gradle
+**/android/captures/
+**/android/gradlew
+**/android/gradlew.bat
+**/android/local.properties
+**/android/**/GeneratedPluginRegistrant.java
+
+# iOS/XCode related
+**/ios/**/*.mode1v3
+**/ios/**/*.mode2v3
+**/ios/**/*.moved-aside
+**/ios/**/*.pbxuser
+**/ios/**/*.perspectivev3
+**/ios/**/*sync/
+**/ios/**/.sconsign.dblite
+**/ios/**/.tags*
+**/ios/**/.vagrant/
+**/ios/**/DerivedData/
+**/ios/**/Icon?
+**/ios/**/Pods/
+**/ios/**/.symlinks/
+**/ios/**/profile
+**/ios/**/xcuserdata
+**/ios/.generated/
+**/ios/Flutter/App.framework
+**/ios/Flutter/Flutter.framework
+**/ios/Flutter/Generated.xcconfig
+**/ios/Flutter/app.flx
+**/ios/Flutter/app.zip
+**/ios/Flutter/flutter_assets/
+**/ios/ServiceDefinitions.json
+**/ios/Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!**/ios/**/default.mode1v3
+!**/ios/**/default.mode2v3
+!**/ios/**/default.pbxuser
+!**/ios/**/default.perspectivev3
+!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/.metadata

@@ -0,0 +1,10 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: 7a4c33425ddd78c54aba07d86f3f9a4a0051769b
+  channel: stable
+
+project_type: app

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/README.md

@@ -0,0 +1,16 @@
+# flutter_ble_example
+
+Demonstrates how to use the flutter_ble plugin.
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://flutter.dev/docs/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://flutter.dev/docs/cookbook)
+
+For help getting started with Flutter, view our 
+[online documentation](https://flutter.dev/docs), which offers tutorials, 
+samples, guidance on mobile development, and a full API reference.

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/app/build.gradle

@@ -0,0 +1,61 @@
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader('UTF-8') { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterRoot = localProperties.getProperty('flutter.sdk')
+if (flutterRoot == null) {
+    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+}
+
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+if (flutterVersionCode == null) {
+    flutterVersionCode = '1'
+}
+
+def flutterVersionName = localProperties.getProperty('flutter.versionName')
+if (flutterVersionName == null) {
+    flutterVersionName = '1.0'
+}
+
+apply plugin: 'com.android.application'
+apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+
+android {
+    compileSdkVersion 28
+
+    lintOptions {
+        disable 'InvalidPackage'
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "ai.longev.flutter.flutter_ble_example"
+        minSdkVersion 19
+        targetSdkVersion 28
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig signingConfigs.debug
+        }
+    }
+}
+
+flutter {
+    source '../..'
+}
+
+dependencies {
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="ai.longev.flutter.flutter_ble_example">
+    <!-- Flutter needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,37 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="ai.longev.flutter.flutter_ble_example">
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <!-- io.flutter.app.FlutterApplication is an android.app.Application that
+         calls FlutterMain.startInitialization(this); in its onCreate method.
+         In most cases you can leave this as-is, but you if you want to provide
+         additional functionality it is fine to subclass or reimplement
+         FlutterApplication and put your custom class here. -->
+    <application
+        android:name="io.flutter.app.FlutterApplication"
+        android:label="flutter_ble_example"
+        android:icon="@mipmap/ic_launcher"
+        tools:ignore="GoogleAppIndexingWarning"
+        android:allowBackup="true">
+        <activity
+            android:name=".MainActivity"
+            android:launchMode="singleTop"
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- This keeps the window background of the activity showing
+                 until Flutter renders its first frame. It can be removed if
+                 there is no splash screen (such as the default splash screen
+                 defined in @style/LaunchTheme). -->
+            <meta-data
+                android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
+                android:value="true" />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/app/src/main/java/ai/longev/flutter/flutter_ble_example/MainActivity.java

@@ -0,0 +1,13 @@
+package ai.longev.flutter.flutter_ble_example;
+
+import android.os.Bundle;
+import io.flutter.app.FlutterActivity;
+import io.flutter.plugins.GeneratedPluginRegistrant;
+
+public class MainActivity extends FlutterActivity {
+  @Override
+  protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    GeneratedPluginRegistrant.registerWith(this);
+  }
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/app/src/main/res/drawable/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/app/src/main/res/values/styles.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             Flutter draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+</resources>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/app/src/profile/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="ai.longev.flutter.flutter_ble_example">
+    <!-- Flutter needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/build.gradle

@@ -0,0 +1,29 @@
+buildscript {
+    repositories {
+        google()
+        jcenter()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.4.1'
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+rootProject.buildDir = '../build'
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(':app')
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/gradle.properties

@@ -0,0 +1,2 @@
+org.gradle.jvmargs=-Xmx1536M
+android.useAndroidX=true

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Fri May 31 15:39:48 CDT 2019
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/android/settings.gradle

@@ -0,0 +1,15 @@
+include ':app'
+
+def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()
+
+def plugins = new Properties()
+def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
+if (pluginsFile.exists()) {
+    pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
+}
+
+plugins.each { name, path ->
+    def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
+    include ":$name"
+    project(":$name").projectDir = pluginDirectory
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Flutter/AppFrameworkInfo.plist

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+  <key>MinimumOSVersion</key>
+  <string>8.0</string>
+</dict>
+</plist>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Flutter/Debug.xcconfig

@@ -0,0 +1,2 @@
+#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include "Generated.xcconfig"

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Flutter/Release.xcconfig

@@ -0,0 +1,2 @@
+#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include "Generated.xcconfig"

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Podfile

@@ -0,0 +1,69 @@
+# Uncomment this line to define a global platform for your project
+# platform :ios, '9.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def parse_KV_file(file, separator='=')
+  file_abs_path = File.expand_path(file)
+  if !File.exists? file_abs_path
+    return [];
+  end
+  pods_ary = []
+  skip_line_start_symbols = ["#", "/"]
+  File.foreach(file_abs_path) { |line|
+      next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
+      plugin = line.split(pattern=separator)
+      if plugin.length == 2
+        podname = plugin[0].strip()
+        path = plugin[1].strip()
+        podpath = File.expand_path("#{path}", file_abs_path)
+        pods_ary.push({:name => podname, :path => podpath});
+      else
+        puts "Invalid plugin specification: #{line}"
+      end
+  }
+  return pods_ary
+end
+
+target 'Runner' do
+  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
+  # referring to absolute paths on developers' machines.
+  system('rm -rf .symlinks')
+  system('mkdir -p .symlinks/plugins')
+
+  # Flutter Pods
+  generated_xcode_build_settings = parse_KV_file('./Flutter/Generated.xcconfig')
+  if generated_xcode_build_settings.empty?
+    puts "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter packages get is executed first."
+  end
+  generated_xcode_build_settings.map { |p|
+    if p[:name] == 'FLUTTER_FRAMEWORK_DIR'
+      symlink = File.join('.symlinks', 'flutter')
+      File.symlink(File.dirname(p[:path]), symlink)
+      pod 'Flutter', :path => File.join(symlink, File.basename(p[:path]))
+    end
+  }
+
+  # Plugin Pods
+  plugin_pods = parse_KV_file('../.flutter-plugins')
+  plugin_pods.map { |p|
+    symlink = File.join('.symlinks', 'plugins', p[:name])
+    File.symlink(p[:path], symlink)
+    pod p[:name], :path => File.join(symlink, 'ios')
+  }
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    target.build_configurations.each do |config|
+      config.build_settings['ENABLE_BITCODE'] = 'NO'
+    end
+  end
+end

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Podfile.lock

@@ -0,0 +1,38 @@
+PODS:
+  - "!ProtoCompiler (3.7.0)":
+    - Protobuf (~> 3.0)
+  - Flutter (1.0.0)
+  - flutter_ble (0.5.1):
+    - "!ProtoCompiler"
+    - Flutter
+    - flutter_ble/Protos (= 0.5.1)
+  - flutter_ble/Protos (0.5.1):
+    - "!ProtoCompiler"
+    - Flutter
+    - Protobuf
+  - Protobuf (3.8.0)
+
+DEPENDENCIES:
+  - Flutter (from `.symlinks/flutter/ios`)
+  - flutter_ble (from `.symlinks/plugins/flutter_ble/ios`)
+
+SPEC REPOS:
+  https://github.com/cocoapods/specs.git:
+    - "!ProtoCompiler"
+    - Protobuf
+
+EXTERNAL SOURCES:
+  Flutter:
+    :path: ".symlinks/flutter/ios"
+  flutter_ble:
+    :path: ".symlinks/plugins/flutter_ble/ios"
+
+SPEC CHECKSUMS:
+  "!ProtoCompiler": efc8ba4dceb16b48f6b366a08500871c8d3ff8d2
+  Flutter: 58dd7d1b27887414a370fcccb9e645c08ffd7a6a
+  flutter_ble: c8480760bed31cb8337311c3faedfa9fcae5f9c1
+  Protobuf: 3f617b9a6e73605565086864c9bc26b2bf2dd5a3
+
+PODFILE CHECKSUM: aff02bfeed411c636180d6812254b2daeea14d09
+
+COCOAPODS: 1.7.0

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner.xcodeproj/project.pbxproj

@@ -0,0 +1,577 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 46;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
+		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		3B80C3941E831B6300D905FE /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 3B80C3931E831B6300D905FE /* App.framework */; };
+		3B80C3951E831B6300D905FE /* App.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 3B80C3931E831B6300D905FE /* App.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
+		9705A1C61CF904A100538489 /* Flutter.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9740EEBA1CF902C7004384FC /* Flutter.framework */; };
+		9705A1C71CF904A300538489 /* Flutter.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 9740EEBA1CF902C7004384FC /* Flutter.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
+		9740EEB41CF90195004384FC /* Debug.xcconfig in Resources */ = {isa = PBXBuildFile; fileRef = 9740EEB21CF90195004384FC /* Debug.xcconfig */; };
+		978B8F6F1D3862AE00F588F7 /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 7AFFD8EE1D35381100E5BB4D /* AppDelegate.m */; };
+		97C146F31CF9000F007C117D /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 97C146F21CF9000F007C117D /* main.m */; };
+		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
+		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
+		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+		A2A537F352EE5164B05911AB /* libPods-Runner.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 6CD001701BDC4728022DB42C /* libPods-Runner.a */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		9705A1C41CF9048500538489 /* Embed Frameworks */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+				3B80C3951E831B6300D905FE /* App.framework in Embed Frameworks */,
+				9705A1C71CF904A300538489 /* Flutter.framework in Embed Frameworks */,
+			);
+			name = "Embed Frameworks";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
+		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
+		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
+		3B80C3931E831B6300D905FE /* App.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = App.framework; path = Flutter/App.framework; sourceTree = "<group>"; };
+		6CD001701BDC4728022DB42C /* libPods-Runner.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-Runner.a"; sourceTree = BUILT_PRODUCTS_DIR; };
+		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
+		7AFFD8ED1D35381100E5BB4D /* AppDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AppDelegate.h; sourceTree = "<group>"; };
+		7AFFD8EE1D35381100E5BB4D /* AppDelegate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AppDelegate.m; sourceTree = "<group>"; };
+		7DD8CFB7F0364D55F5354FE1 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
+		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Debug.xcconfig; path = Flutter/Debug.xcconfig; sourceTree = "<group>"; };
+		9740EEB31CF90195004384FC /* Generated.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Generated.xcconfig; path = Flutter/Generated.xcconfig; sourceTree = "<group>"; };
+		9740EEBA1CF902C7004384FC /* Flutter.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Flutter.framework; path = Flutter/Flutter.framework; sourceTree = "<group>"; };
+		97C146EE1CF9000F007C117D /* Runner.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Runner.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		97C146F21CF9000F007C117D /* main.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = "<group>"; };
+		97C146FB1CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
+		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
+		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
+		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		CF6E4140832AD784A39F6B08 /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
+		DE00DC1DC429064AF0B2580C /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		97C146EB1CF9000F007C117D /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				9705A1C61CF904A100538489 /* Flutter.framework in Frameworks */,
+				3B80C3941E831B6300D905FE /* App.framework in Frameworks */,
+				A2A537F352EE5164B05911AB /* libPods-Runner.a in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		3A903686E102B85427835225 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				6CD001701BDC4728022DB42C /* libPods-Runner.a */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+		9740EEB11CF90186004384FC /* Flutter */ = {
+			isa = PBXGroup;
+			children = (
+				3B80C3931E831B6300D905FE /* App.framework */,
+				3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */,
+				9740EEBA1CF902C7004384FC /* Flutter.framework */,
+				9740EEB21CF90195004384FC /* Debug.xcconfig */,
+				7AFA3C8E1D35360C0083082E /* Release.xcconfig */,
+				9740EEB31CF90195004384FC /* Generated.xcconfig */,
+			);
+			name = Flutter;
+			sourceTree = "<group>";
+		};
+		97C146E51CF9000F007C117D = {
+			isa = PBXGroup;
+			children = (
+				9740EEB11CF90186004384FC /* Flutter */,
+				97C146F01CF9000F007C117D /* Runner */,
+				97C146EF1CF9000F007C117D /* Products */,
+				D6EA32F9A89D2F62F8ABD1E7 /* Pods */,
+				3A903686E102B85427835225 /* Frameworks */,
+			);
+			sourceTree = "<group>";
+		};
+		97C146EF1CF9000F007C117D /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				97C146EE1CF9000F007C117D /* Runner.app */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		97C146F01CF9000F007C117D /* Runner */ = {
+			isa = PBXGroup;
+			children = (
+				7AFFD8ED1D35381100E5BB4D /* AppDelegate.h */,
+				7AFFD8EE1D35381100E5BB4D /* AppDelegate.m */,
+				97C146FA1CF9000F007C117D /* Main.storyboard */,
+				97C146FD1CF9000F007C117D /* Assets.xcassets */,
+				97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */,
+				97C147021CF9000F007C117D /* Info.plist */,
+				97C146F11CF9000F007C117D /* Supporting Files */,
+				1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */,
+				1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */,
+			);
+			path = Runner;
+			sourceTree = "<group>";
+		};
+		97C146F11CF9000F007C117D /* Supporting Files */ = {
+			isa = PBXGroup;
+			children = (
+				97C146F21CF9000F007C117D /* main.m */,
+			);
+			name = "Supporting Files";
+			sourceTree = "<group>";
+		};
+		D6EA32F9A89D2F62F8ABD1E7 /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				DE00DC1DC429064AF0B2580C /* Pods-Runner.debug.xcconfig */,
+				7DD8CFB7F0364D55F5354FE1 /* Pods-Runner.release.xcconfig */,
+				CF6E4140832AD784A39F6B08 /* Pods-Runner.profile.xcconfig */,
+			);
+			path = Pods;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		97C146ED1CF9000F007C117D /* Runner */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
+			buildPhases = (
+				F4B005EC65297E62A1063D35 /* [CP] Check Pods Manifest.lock */,
+				9740EEB61CF901F6004384FC /* Run Script */,
+				97C146EA1CF9000F007C117D /* Sources */,
+				97C146EB1CF9000F007C117D /* Frameworks */,
+				97C146EC1CF9000F007C117D /* Resources */,
+				9705A1C41CF9048500538489 /* Embed Frameworks */,
+				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+				743D5EE8D0F9D613E1A63883 /* [CP] Embed Pods Frameworks */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = Runner;
+			productName = Runner;
+			productReference = 97C146EE1CF9000F007C117D /* Runner.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		97C146E61CF9000F007C117D /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				LastUpgradeCheck = 0910;
+				ORGANIZATIONNAME = "The Chromium Authors";
+				TargetAttributes = {
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+/* End PBXShellScriptBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
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+			);
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+/* End PBXSourcesBuildPhase section */
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+				97C146FB1CF9000F007C117D /* Base */,
+			);
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+			sourceTree = "<group>";
+		};
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+			children = (
+				97C147001CF9000F007C117D /* Base */,
+			);
+			name = LaunchScreen.storyboard;
+			sourceTree = "<group>";
+		};
+/* End PBXVariantGroup section */
+
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+			isa = XCBuildConfiguration;
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+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
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+				CLANG_ENABLE_MODULES = YES;
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+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
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+				CLANG_WARN_INT_CONVERSION = YES;
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+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
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+				COPY_PHASE_STRIP = NO;
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+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
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+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				DEVELOPMENT_TEAM = 3D56TJUQRV;
+				ENABLE_BITCODE = NO;
+				FRAMEWORK_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(PROJECT_DIR)/Flutter",
+				);
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				LIBRARY_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(PROJECT_DIR)/Flutter",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = ai.longev.flutter.flutterBleExample;
+				PRODUCT_NAME = "$(TARGET_NAME)";
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+			name = Profile;
+		};
+		97C147031CF9000F007C117D /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
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+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
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+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
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+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
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+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
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+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				DEVELOPMENT_TEAM = 3D56TJUQRV;
+				ENABLE_BITCODE = NO;
+				FRAMEWORK_SEARCH_PATHS = (
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+				);
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
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+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+</Workspace>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -0,0 +1,93 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0910"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+               BuildableName = "Runner.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      language = ""
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
+</Workspace>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>BuildSystemType</key>
+	<string>Original</string>
+</dict>
+</plist>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner/AppDelegate.h

@@ -0,0 +1,6 @@
+#import <Flutter/Flutter.h>
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : FlutterAppDelegate
+
+@end

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner/AppDelegate.m

@@ -0,0 +1,13 @@
+#include "AppDelegate.h"
+#include "GeneratedPluginRegistrant.h"
+
+@implementation AppDelegate
+
+- (BOOL)application:(UIApplication *)application
+    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+  [GeneratedPluginRegistrant registerWithRegistry:self];
+  // Override point for customization after application launch.
+  return [super application:application didFinishLaunchingWithOptions:launchOptions];
+}
+
+@end

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,122 @@
+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "83.5x83.5",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-83.5x83.5@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "Icon-App-1024x1024@1x.png",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md

@@ -0,0 +1,5 @@
+# Launch Screen Assets
+
+You can customize the launch screen with your own desired assets by replacing the image files in this directory.
+
+You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner/Base.lproj/LaunchScreen.storyboard

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
+                        <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="1a2-6s-vTC"/>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="4X2-HB-R7a"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="LaunchImage" width="168" height="185"/>
+    </resources>
+</document>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner/Base.lproj/Main.storyboard

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
+    </dependencies>
+    <scenes>
+        <!--Flutter View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
+                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner/Info.plist

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>flutter_ble_example</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UIViewControllerBasedStatusBarAppearance</key>
+	<false/>
+</dict>
+</plist>

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/ios/Runner/main.m

@@ -0,0 +1,9 @@
+#import <Flutter/Flutter.h>
+#import <UIKit/UIKit.h>
+#import "AppDelegate.h"
+
+int main(int argc, char* argv[]) {
+  @autoreleasepool {
+    return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
+  }
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/lib/main.dart

@@ -0,0 +1,328 @@
+// Copyright 2017, Paul DeMarco.
+// All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_ble/flutter_ble.dart';
+import 'package:flutter_ble_example/widgets.dart';
+
+void main() {
+  runApp(new FlutterBleApp());
+}
+
+class FlutterBleApp extends StatefulWidget {
+  FlutterBleApp({Key key, this.title}) : super(key: key);
+
+  final String title;
+
+  @override
+  _FlutterBleAppState createState() => new _FlutterBleAppState();
+}
+
+class _FlutterBleAppState extends State<FlutterBleApp> {
+  FlutterBle _flutterBlue = FlutterBle.instance;
+
+  /// Scanning
+  StreamSubscription _scanSubscription;
+  Map<DeviceIdentifier, ScanResult> scanResults = new Map();
+  bool isScanning = false;
+
+  /// State
+  StreamSubscription _stateSubscription;
+  BluetoothState state = BluetoothState.unknown;
+
+  /// Device
+  BluetoothDevice device;
+  bool get isConnected => (device != null);
+  StreamSubscription deviceConnection;
+  StreamSubscription deviceStateSubscription;
+  List<BluetoothService> services = new List();
+  Map<Guid, StreamSubscription> valueChangedSubscriptions = {};
+  BluetoothDeviceState deviceState = BluetoothDeviceState.disconnected;
+
+  @override
+  void initState() {
+    super.initState();
+    // Immediately get the state of FlutterBle
+    _flutterBlue.state.then((s) {
+      setState(() {
+        state = s;
+      });
+    });
+    // Subscribe to state changes
+    _stateSubscription = _flutterBlue.onStateChanged().listen((s) {
+      setState(() {
+        state = s;
+      });
+    });
+  }
+
+  @override
+  void dispose() {
+    _stateSubscription?.cancel();
+    _stateSubscription = null;
+    _scanSubscription?.cancel();
+    _scanSubscription = null;
+    deviceConnection?.cancel();
+    deviceConnection = null;
+    super.dispose();
+  }
+
+  _startScan() {
+    _scanSubscription = _flutterBlue
+        .scan(
+      timeout: const Duration(seconds: 5),
+      /*withServices: [
+          new Guid('0000180F-0000-1000-8000-00805F9B34FB')
+        ]*/
+    )
+        .listen((scanResult) {
+      print('localName: ${scanResult.advertisementData.localName}');
+      print(
+          'manufacturerData: ${scanResult.advertisementData.manufacturerData}');
+      print('serviceData: ${scanResult.advertisementData.serviceData}');
+      setState(() {
+        scanResults[scanResult.device.id] = scanResult;
+      });
+    }, onDone: _stopScan);
+
+    setState(() {
+      isScanning = true;
+    });
+  }
+
+  _stopScan() {
+    _scanSubscription?.cancel();
+    _scanSubscription = null;
+    setState(() {
+      isScanning = false;
+    });
+  }
+
+  _connect(BluetoothDevice d) async {
+    device = d;
+    // Connect to device
+    deviceConnection = _flutterBlue
+        .connect(device, timeout: const Duration(seconds: 4))
+        .listen(
+      null,
+      onDone: _disconnect,
+    );
+
+    // Update the connection state immediately
+    device.state.then((s) {
+      setState(() {
+        deviceState = s;
+      });
+    });
+
+    // Subscribe to connection changes
+    deviceStateSubscription = device.onStateChanged().listen((s) {
+      setState(() {
+        deviceState = s;
+      });
+      if (s == BluetoothDeviceState.connected) {
+        device.discoverServices().then((s) {
+          setState(() {
+            services = s;
+          });
+        });
+      }
+    });
+  }
+
+  _disconnect() {
+    // Remove all value changed listeners
+    valueChangedSubscriptions.forEach((uuid, sub) => sub.cancel());
+    valueChangedSubscriptions.clear();
+    deviceStateSubscription?.cancel();
+    deviceStateSubscription = null;
+    deviceConnection?.cancel();
+    deviceConnection = null;
+    setState(() {
+      device = null;
+    });
+  }
+
+  _readCharacteristic(BluetoothCharacteristic c) async {
+    await device.readCharacteristic(c);
+    setState(() {});
+  }
+
+  _writeCharacteristic(BluetoothCharacteristic c) async {
+    await device.writeCharacteristic(c, [0x12, 0x34],
+        type: CharacteristicWriteType.withResponse);
+    setState(() {});
+  }
+
+  _readDescriptor(BluetoothDescriptor d) async {
+    await device.readDescriptor(d);
+    setState(() {});
+  }
+
+  _writeDescriptor(BluetoothDescriptor d) async {
+    await device.writeDescriptor(d, [0x12, 0x34]);
+    setState(() {});
+  }
+
+  _setNotification(BluetoothCharacteristic c) async {
+    if (c.isNotifying) {
+      await device.setNotifyValue(c, false);
+      // Cancel subscription
+      valueChangedSubscriptions[c.uuid]?.cancel();
+      valueChangedSubscriptions.remove(c.uuid);
+    } else {
+      await device.setNotifyValue(c, true);
+      // ignore: cancel_subscriptions
+      final sub = device.onValueChanged(c).listen((d) {
+        setState(() {
+          print('onValueChanged $d');
+        });
+      });
+      // Add to map
+      valueChangedSubscriptions[c.uuid] = sub;
+    }
+    setState(() {});
+  }
+
+  _refreshDeviceState(BluetoothDevice d) async {
+    var state = await d.state;
+    setState(() {
+      deviceState = state;
+      print('State refreshed: $deviceState');
+    });
+  }
+
+  _buildScanningButton() {
+    if (isConnected || state != BluetoothState.on) {
+      return null;
+    }
+    if (isScanning) {
+      return new FloatingActionButton(
+        child: new Icon(Icons.stop),
+        onPressed: _stopScan,
+        backgroundColor: Colors.red,
+      );
+    } else {
+      return new FloatingActionButton(
+          child: new Icon(Icons.search), onPressed: _startScan);
+    }
+  }
+
+  _buildScanResultTiles() {
+    return scanResults.values
+        .map((r) => ScanResultTile(
+      result: r,
+      onTap: () => _connect(r.device),
+    ))
+        .toList();
+  }
+
+  List<Widget> _buildServiceTiles() {
+    return services
+        .map(
+          (s) => new ServiceTile(
+        service: s,
+        characteristicTiles: s.characteristics
+            .map(
+              (c) => new CharacteristicTile(
+            characteristic: c,
+            onReadPressed: () => _readCharacteristic(c),
+            onWritePressed: () => _writeCharacteristic(c),
+            onNotificationPressed: () => _setNotification(c),
+            descriptorTiles: c.descriptors
+                .map(
+                  (d) => new DescriptorTile(
+                descriptor: d,
+                onReadPressed: () => _readDescriptor(d),
+                onWritePressed: () =>
+                    _writeDescriptor(d),
+              ),
+            )
+                .toList(),
+          ),
+        )
+            .toList(),
+      ),
+    )
+        .toList();
+  }
+
+  _buildActionButtons() {
+    if (isConnected) {
+      return <Widget>[
+        new IconButton(
+          icon: const Icon(Icons.cancel),
+          onPressed: () => _disconnect(),
+        )
+      ];
+    }
+  }
+
+  _buildAlertTile() {
+    return new Container(
+      color: Colors.redAccent,
+      child: new ListTile(
+        title: new Text(
+          'Bluetooth adapter is ${state.toString().substring(15)}',
+          style: Theme.of(context).primaryTextTheme.subhead,
+        ),
+        trailing: new Icon(
+          Icons.error,
+          color: Theme.of(context).primaryTextTheme.subhead.color,
+        ),
+      ),
+    );
+  }
+
+  _buildDeviceStateTile() {
+    return new ListTile(
+        leading: (deviceState == BluetoothDeviceState.connected)
+            ? const Icon(Icons.bluetooth_connected)
+            : const Icon(Icons.bluetooth_disabled),
+        title: new Text('Device is ${deviceState.toString().split('.')[1]}.'),
+        subtitle: new Text('${device.id}'),
+        trailing: new IconButton(
+          icon: const Icon(Icons.refresh),
+          onPressed: () => _refreshDeviceState(device),
+          color: Theme.of(context).iconTheme.color.withOpacity(0.5),
+        ));
+  }
+
+  _buildProgressBarTile() {
+    return new LinearProgressIndicator();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    var tiles = new List<Widget>();
+    if (state != BluetoothState.on) {
+      tiles.add(_buildAlertTile());
+    }
+    if (isConnected) {
+      tiles.add(_buildDeviceStateTile());
+      tiles.addAll(_buildServiceTiles());
+    } else {
+      tiles.addAll(_buildScanResultTiles());
+    }
+    return new MaterialApp(
+      home: new Scaffold(
+        appBar: new AppBar(
+          title: const Text('Flutter Longev BLE'),
+          actions: _buildActionButtons(),
+        ),
+        floatingActionButton: _buildScanningButton(),
+        body: new Stack(
+          children: <Widget>[
+            (isScanning) ? _buildProgressBarTile() : new Container(),
+            new ListView(
+              children: tiles,
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/lib/widgets.dart

@@ -0,0 +1,280 @@
+// Copyright 2017, Paul DeMarco.
+// All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_ble/flutter_ble.dart';
+
+class ScanResultTile extends StatelessWidget {
+  const ScanResultTile({Key key, this.result, this.onTap}) : super(key: key);
+
+  final ScanResult result;
+  final VoidCallback onTap;
+
+  Widget _buildTitle(BuildContext context) {
+    if (result.device.name.length > 0) {
+      return Column(
+        mainAxisAlignment: MainAxisAlignment.start,
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: <Widget>[
+          Text(result.device.name),
+          Text(
+            result.device.id.toString(),
+            style: Theme.of(context).textTheme.caption,
+          )
+        ],
+      );
+    } else {
+      return Text(result.device.id.toString());
+    }
+  }
+
+  Widget _buildAdvRow(BuildContext context, String title, String value) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 4.0),
+      child: Row(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: <Widget>[
+          Text(title, style: Theme.of(context).textTheme.caption),
+          SizedBox(
+            width: 12.0,
+          ),
+          Expanded(
+            child: Text(
+              value,
+              style: Theme.of(context)
+                  .textTheme
+                  .caption
+                  .apply(color: Colors.black),
+              softWrap: true,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  String getNiceHexArray(List<int> bytes) {
+    return '[${bytes.map((i) => i.toRadixString(16).padLeft(2, '0')).join(', ')}]'
+        .toUpperCase();
+  }
+
+  String getNiceManufacturerData(Map<int, List<int>> data) {
+    if (data.isEmpty) {
+      return null;
+    }
+    List<String> res = [];
+    data.forEach((id, bytes) {
+      res.add(
+          '${id.toRadixString(16).toUpperCase()}: ${getNiceHexArray(bytes)}');
+    });
+    return res.join(', ');
+  }
+
+  String getNiceServiceData(Map<String, List<int>> data) {
+    if (data.isEmpty) {
+      return null;
+    }
+    List<String> res = [];
+    data.forEach((id, bytes) {
+      res.add('${id.toUpperCase()}: ${getNiceHexArray(bytes)}');
+    });
+    return res.join(', ');
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return ExpansionTile(
+      title: _buildTitle(context),
+      leading: Text(result.rssi.toString()),
+      trailing: RaisedButton(
+        child: Text('CONNECT'),
+        color: Colors.black,
+        textColor: Colors.white,
+        onPressed: (result.advertisementData.connectable) ? onTap : null,
+      ),
+      children: <Widget>[
+        _buildAdvRow(
+            context, 'Complete Local Name', result.advertisementData.localName),
+        _buildAdvRow(context, 'Tx Power Level',
+            '${result.advertisementData.txPowerLevel ?? 'N/A'}'),
+        _buildAdvRow(
+            context,
+            'Manufacturer Data',
+            getNiceManufacturerData(
+                result.advertisementData.manufacturerData) ??
+                'N/A'),
+        _buildAdvRow(
+            context,
+            'Service UUIDs',
+            (result.advertisementData.serviceUuids.isNotEmpty)
+                ? result.advertisementData.serviceUuids.join(', ').toUpperCase()
+                : 'N/A'),
+        _buildAdvRow(context, 'Service Data',
+            getNiceServiceData(result.advertisementData.serviceData) ?? 'N/A'),
+      ],
+    );
+  }
+}
+
+class ServiceTile extends StatelessWidget {
+  final BluetoothService service;
+  final List<CharacteristicTile> characteristicTiles;
+
+  const ServiceTile({Key key, this.service, this.characteristicTiles})
+      : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    if (characteristicTiles.length > 0) {
+      return new ExpansionTile(
+        title: new Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: <Widget>[
+            const Text('Service'),
+            new Text(
+                '0x${service.uuid.toString().toUpperCase().substring(4, 8)}',
+                style: Theme.of(context)
+                    .textTheme
+                    .body1
+                    .copyWith(color: Theme.of(context).textTheme.caption.color))
+          ],
+        ),
+        children: characteristicTiles,
+      );
+    } else {
+      return new ListTile(
+        title: const Text('Service'),
+        subtitle: new Text(
+            '0x${service.uuid.toString().toUpperCase().substring(4, 8)}'),
+      );
+    }
+  }
+}
+
+class CharacteristicTile extends StatelessWidget {
+  final BluetoothCharacteristic characteristic;
+  final List<DescriptorTile> descriptorTiles;
+  final VoidCallback onReadPressed;
+  final VoidCallback onWritePressed;
+  final VoidCallback onNotificationPressed;
+
+  const CharacteristicTile(
+      {Key key,
+        this.characteristic,
+        this.descriptorTiles,
+        this.onReadPressed,
+        this.onWritePressed,
+        this.onNotificationPressed})
+      : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    var actions = new Row(
+      mainAxisSize: MainAxisSize.min,
+      children: <Widget>[
+        new IconButton(
+          icon: new Icon(
+            Icons.file_download,
+            color: Theme.of(context).iconTheme.color.withOpacity(0.5),
+          ),
+          onPressed: onReadPressed,
+        ),
+        new IconButton(
+          icon: new Icon(Icons.file_upload,
+              color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
+          onPressed: onWritePressed,
+        ),
+        new IconButton(
+          icon: new Icon(
+              characteristic.isNotifying ? Icons.sync_disabled : Icons.sync,
+              color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
+          onPressed: onNotificationPressed,
+        )
+      ],
+    );
+
+    var title = new Column(
+      mainAxisAlignment: MainAxisAlignment.center,
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: <Widget>[
+        const Text('Characteristic'),
+        new Text(
+            '0x${characteristic.uuid.toString().toUpperCase().substring(4, 8)}',
+            style: Theme.of(context)
+                .textTheme
+                .body1
+                .copyWith(color: Theme.of(context).textTheme.caption.color))
+      ],
+    );
+
+    if (descriptorTiles.length > 0) {
+      return new ExpansionTile(
+        title: new ListTile(
+          title: title,
+          subtitle: new Text(characteristic.value.toString()),
+          contentPadding: EdgeInsets.all(0.0),
+        ),
+        trailing: actions,
+        children: descriptorTiles,
+      );
+    } else {
+      return new ListTile(
+        title: title,
+        subtitle: new Text(characteristic.value.toString()),
+        trailing: actions,
+      );
+    }
+  }
+}
+
+class DescriptorTile extends StatelessWidget {
+  final BluetoothDescriptor descriptor;
+  final VoidCallback onReadPressed;
+  final VoidCallback onWritePressed;
+
+  const DescriptorTile(
+      {Key key, this.descriptor, this.onReadPressed, this.onWritePressed})
+      : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    var title = new Column(
+      mainAxisAlignment: MainAxisAlignment.center,
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: <Widget>[
+        const Text('Descriptor'),
+        new Text(
+            '0x${descriptor.uuid.toString().toUpperCase().substring(4, 8)}',
+            style: Theme.of(context)
+                .textTheme
+                .body1
+                .copyWith(color: Theme.of(context).textTheme.caption.color))
+      ],
+    );
+    return new ListTile(
+      title: title,
+      subtitle: new Text(descriptor.value.toString()),
+      trailing: new Row(
+        mainAxisSize: MainAxisSize.min,
+        children: <Widget>[
+          new IconButton(
+            icon: new Icon(
+              Icons.file_download,
+              color: Theme.of(context).iconTheme.color.withOpacity(0.5),
+            ),
+            onPressed: onReadPressed,
+          ),
+          new IconButton(
+            icon: new Icon(
+              Icons.file_upload,
+              color: Theme.of(context).iconTheme.color.withOpacity(0.5),
+            ),
+            onPressed: onWritePressed,
+          )
+        ],
+      ),
+    );
+  }
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/pubspec.lock

@@ -0,0 +1,174 @@
+# Generated by pub
+# See https://www.dartlang.org/tools/pub/glossary#lockfile
+packages:
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.2"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.14.11"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
+  cupertino_icons:
+    dependency: "direct main"
+    description:
+      name: cupertino_icons
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.2"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.10.9"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_ble:
+    dependency: "direct dev"
+    description:
+      path: ".."
+      relative: true
+    source: path
+    version: "0.5.1"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.12.5"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.6"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.6.2"
+  pedantic:
+    dependency: transitive
+    description:
+      name: pedantic
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.5.0"
+  protobuf:
+    dependency: transitive
+    description:
+      name: protobuf
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.13.11"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.2"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.5.5"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.9.3"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.2.4"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.6"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.8"
+sdks:
+  dart: ">=2.2.0 <3.0.0"

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/pubspec.yaml

@@ -0,0 +1,63 @@
+name: flutter_ble_example
+description: Demonstrates how to use the flutter_ble plugin.
+publish_to: 'none'
+
+environment:
+  sdk: ">=2.1.0 <3.0.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+  # The following adds the Cupertino Icons font to your application.
+  # Use with the CupertinoIcons class for iOS style icons.
+  cupertino_icons: ^0.1.2
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  flutter_ble:
+    path: ../
+
+# For information on the generic Dart part of this file, see the
+# following page: https://www.dartlang.org/tools/pub/pubspec
+
+# The following section is specific to Flutter.
+flutter:
+
+  # The following line ensures that the Material Icons font is
+  # included with your application, so that you can use the icons in
+  # the material Icons class.
+  uses-material-design: true
+
+  # To add assets to your application, add an assets section, like this:
+  # assets:
+  #  - images/a_dot_burr.jpeg
+  #  - images/a_dot_ham.jpeg
+
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/assets-and-images/#resolution-aware.
+
+  # For details regarding adding assets from package dependencies, see
+  # https://flutter.dev/assets-and-images/#from-packages
+
+  # To add custom fonts to your application, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts from package dependencies,
+  # see https://flutter.dev/custom-fonts/#from-packages

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/example/test/widget_test.dart

@@ -0,0 +1,27 @@
+// This is a basic Flutter widget test.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility that Flutter provides. For example, you can send tap and scroll
+// gestures. You can also use WidgetTester to find child widgets in the widget
+// tree, read text, and verify that the values of widget properties are correct.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:flutter_ble_example/main.dart';
+
+void main() {
+  testWidgets('Verify Platform version', (WidgetTester tester) async {
+    // Build our app and trigger a frame.
+    await tester.pumpWidget(FlutterBleApp());
+
+    // Verify that platform version is retrieved.
+    expect(
+      find.byWidgetPredicate(
+        (Widget widget) => widget is Text &&
+                           widget.data.startsWith('Running on:'),
+      ),
+      findsOneWidget,
+    );
+  });
+}

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/ios/.gitignore

@@ -0,0 +1,36 @@
+.idea/
+.vagrant/
+.sconsign.dblite
+.svn/
+
+.DS_Store
+*.swp
+profile
+
+DerivedData/
+build/
+GeneratedPluginRegistrant.h
+GeneratedPluginRegistrant.m
+
+.generated/
+
+*.pbxuser
+*.mode1v3
+*.mode2v3
+*.perspectivev3
+
+!default.pbxuser
+!default.mode1v3
+!default.mode2v3
+!default.perspectivev3
+
+xcuserdata
+
+*.moved-aside
+
+*.pyc
+*sync/
+Icon?
+.tags*
+
+/Flutter/Generated.xcconfig

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/ios/Classes/FlutterBlePlugin.h

@@ -0,0 +1,11 @@
+#import <Flutter/Flutter.h>
+#import <CoreBluetooth/CoreBluetooth.h>
+
+#define NAMESPACE @"ai.longev.flutter/flutter_ble"
+
+@interface FlutterBlePlugin : NSObject<FlutterPlugin, CBCentralManagerDelegate, CBPeripheralDelegate>
+@end
+
+@interface FlutterBleStreamHandler : NSObject<FlutterStreamHandler>
+@property FlutterEventSink sink;
+@end

Esp32_temperature_humidity_ble_FLUTTER/flutter_ble_app/flutter_ble-master/ios/Classes/FlutterBlePlugin.m

@@ -0,0 +1,752 @@
+// Copyright 2017, Paul DeMarco.
+// All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#import "FlutterBlePlugin.h"
+#import "Flutterblue.pbobjc.h"
+
+@interface CBUUID (CBUUIDAdditionsFlutterBle)
+- (NSString *)fullUUIDString;
+@end
+
+@implementation CBUUID (CBUUIDAdditionsFlutterBle)
+- (NSString *)fullUUIDString {
+  if(self.UUIDString.length == 4) {
+    return [[NSString stringWithFormat:@"0000%@-0000-1000-8000-00805F9B34FB", self.UUIDString] lowercaseString];
+  }
+  return [self.UUIDString lowercaseString];
+}
+@end
+
+typedef NS_ENUM(NSUInteger, LogLevel) {
+  emergency = 0,
+  alert = 1,
+  critical = 2,
+  error = 3,
+  warning = 4,
+  notice = 5,
+  info = 6,
+  debug = 7
+};
+
+@interface FlutterBlePlugin ()
+@property(nonatomic, retain) NSObject<FlutterPluginRegistrar> *registrar;
+@property(nonatomic, retain) FlutterMethodChannel *channel;
+@property(nonatomic, retain) FlutterBleStreamHandler *stateStreamHandler;
+@property(nonatomic, retain) FlutterBleStreamHandler *scanResultStreamHandler;
+@property(nonatomic, retain) FlutterBleStreamHandler *servicesDiscoveredStreamHandler;
+@property(nonatomic, retain) FlutterBleStreamHandler *characteristicReadStreamHandler;
+@property(nonatomic, retain) FlutterBleStreamHandler *descriptorReadStreamHandler;
+@property(nonatomic, retain) CBCentralManager *centralManager;
+@property(nonatomic) NSMutableDictionary *scannedPeripherals;
+@property(nonatomic) NSMutableArray *servicesThatNeedDiscovered;
+@property(nonatomic) NSMutableArray *characteristicsThatNeedDiscovered;
+@property(nonatomic) LogLevel logLevel;
+@end
+
+@implementation FlutterBlePlugin
++ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
+  FlutterMethodChannel* channel = [FlutterMethodChannel
+                                   methodChannelWithName:NAMESPACE @"/methods"
+                                   binaryMessenger:[registrar messenger]];
+  FlutterEventChannel* stateChannel = [FlutterEventChannel eventChannelWithName:NAMESPACE @"/state" binaryMessenger:[registrar messenger]];
+  FlutterEventChannel* scanResultChannel = [FlutterEventChannel eventChannelWithName:NAMESPACE @"/scanResult" binaryMessenger:[registrar messenger]];
+  FlutterEventChannel* servicesDiscoveredChannel = [FlutterEventChannel eventChannelWithName:NAMESPACE @"/servicesDiscovered" binaryMessenger:[registrar messenger]];
+  FlutterEventChannel* characteristicReadChannel = [FlutterEventChannel eventChannelWithName:NAMESPACE @"/characteristicRead" binaryMessenger:[registrar messenger]];
+  FlutterEventChannel* descriptorReadChannel = [FlutterEventChannel eventChannelWithName:NAMESPACE @"/descriptorRead" binaryMessenger:[registrar messenger]];
+  FlutterBlePlugin* instance = [[FlutterBlePlugin alloc] init];
+  instance.channel = channel;
+  instance.centralManager = [[CBCentralManager alloc] initWithDelegate:instance queue:nil];
+  instance.scannedPeripherals = [NSMutableDictionary new];
+  instance.servicesThatNeedDiscovered = [NSMutableArray new];
+  instance.characteristicsThatNeedDiscovered = [NSMutableArray new];
+  instance.logLevel = emergency;
+
+  // STATE
+  FlutterBleStreamHandler* stateStreamHandler = [[FlutterBleStreamHandler alloc] init];
+  [stateChannel setStreamHandler:stateStreamHandler];
+  instance.stateStreamHandler = stateStreamHandler;
+
+  // SCAN RESULTS
+  FlutterBleStreamHandler* scanResultStreamHandler = [[FlutterBleStreamHandler alloc] init];
+  [scanResultChannel setStreamHandler:scanResultStreamHandler];
+  instance.scanResultStreamHandler = scanResultStreamHandler;
+
+  // SERVICES DISCOVERED
+  FlutterBleStreamHandler* servicesDiscoveredStreamHandler = [[FlutterBleStreamHandler alloc] init];
+  [servicesDiscoveredChannel setStreamHandler:servicesDiscoveredStreamHandler];
+  instance.servicesDiscoveredStreamHandler = servicesDiscoveredStreamHandler;
+
+  // CHARACTERISTIC READ
+  FlutterBleStreamHandler* characteristicReadStreamHandler = [[FlutterBleStreamHandler alloc] init];
+  [characteristicReadChannel setStreamHandler:characteristicReadStreamHandler];
+  instance.characteristicReadStreamHandler = characteristicReadStreamHandler;
+
+  // DESCRIPTOR READ
+  FlutterBleStreamHandler* descriptorReadStreamHandler = [[FlutterBleStreamHandler alloc] init];
+  [descriptorReadChannel setStreamHandler:descriptorReadStreamHandler];
+  instance.descriptorReadStreamHandler = descriptorReadStreamHandler;
+
+  [registrar addMethodCallDelegate:instance channel:channel];
+}
+
+- (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
+  if ([@"setLogLevel" isEqualToString:call.method]) {
+    NSNumber *logLevelIndex = [call arguments];
+    _logLevel = (LogLevel)[logLevelIndex integerValue];
+    result(nil);
+  } else if ([@"state" isEqualToString:call.method]) {
+    FlutterStandardTypedData *data = [self toFlutterData:[self toBluetoothStateProto:self->_centralManager.state]];
+    result(data);
+  } else if([@"isAvailable" isEqualToString:call.method]) {
+    if(self.centralManager.state != CBManagerStateUnsupported && self.centralManager.state != CBManagerStateUnknown) {
+      result(@(YES));
+    } else {
+      result(@(NO));
+    }
+  } else if([@"isOn" isEqualToString:call.method]) {
+    if(self.centralManager.state == CBManagerStatePoweredOn) {
+      result(@(YES));
+    } else {
+      result(@(NO));
+    }
+  } else if([@"startScan" isEqualToString:call.method]) {
+    // Clear any existing scan results
+    [self.scannedPeripherals removeAllObjects];
+    // TODO: Request Permission?
+    FlutterStandardTypedData *data = [call arguments];
+    ProtosScanSettings *request = [[ProtosScanSettings alloc] initWithData:[data data] error:nil];
+    // UUID Service filter
+    NSArray *uuids = [NSArray array];
+    for (int i = 0; i < [request serviceUuidsArray_Count]; i++) {
+      NSString *u = [request.serviceUuidsArray objectAtIndex:i];
+      uuids = [uuids arrayByAddingObject:[CBUUID UUIDWithString:u]];
+    }
+    // TODO: iOS Scan Options (#35)
+    [self->_centralManager scanForPeripheralsWithServices:uuids options:nil];
+    result(nil);
+  } else if([@"stopScan" isEqualToString:call.method]) {
+    [self->_centralManager stopScan];
+    result(nil);
+  } else if([@"connect" isEqualToString:call.method]) {
+    FlutterStandardTypedData *data = [call arguments];
+    ProtosConnectRequest *request = [[ProtosConnectRequest alloc] initWithData:[data data] error:nil];
+    NSString *remoteId = [request remoteId];
+    @try {
+      CBPeripheral *peripheral = [_scannedPeripherals objectForKey:remoteId];
+      if(peripheral == nil) {
+        @throw [FlutterError errorWithCode:@"connect"
+                                   message:@"Peripheral not found"
+                                   details:nil];
+      }
+      // TODO: Implement Connect options (#36)
+      [_centralManager connectPeripheral:peripheral options:nil];
+      result(nil);
+    } @catch(FlutterError *e) {
+      result(e);
+    }
+  } else if([@"disconnect" isEqualToString:call.method]) {
+    NSString *remoteId = [call arguments];
+    @try {
+      CBPeripheral *peripheral = [self findPeripheral:remoteId];
+      [_centralManager cancelPeripheralConnection:peripheral];
+      result(nil);
+    } @catch(FlutterError *e) {
+      result(e);
+    }
+  } else if([@"deviceState" isEqualToString:call.method]) {
+    NSString *remoteId = [call arguments];
+    @try {
+      CBPeripheral *peripheral = [self findPeripheral:remoteId];
+      result([self toFlutterData:[self toDeviceStateProto:peripheral state:peripheral.state]]);
+    } @catch(FlutterError *e) {
+      result(e);
+    }
+  } else if([@"discoverServices" isEqualToString:call.method]) {
+    NSString *remoteId = [call arguments];
+    @try {
+      CBPeripheral *peripheral = [self findPeripheral:remoteId];
+      // Clear helper arrays
+      [_servicesThatNeedDiscovered removeAllObjects];
+      [_characteristicsThatNeedDiscovered removeAllObjects ];
+      [peripheral discoverServices:nil];
+      result(nil);
+    } @catch(FlutterError *e) {
+      result(e);
+    }
+  } else if([@"services" isEqualToString:call.method]) {
+    NSString *remoteId = [call arguments];
+    @try {
+      CBPeripheral *peripheral = [self findPeripheral:remoteId];
+      result([self toFlutterData:[self toServicesResultProto:peripheral]]);
+    } @catch(FlutterError *e) {
+      result(e);
+    }
+  } else if([@"readCharacteristic" isEqualToString:call.method]) {
+    FlutterStandardTypedData *data = [call arguments];
+    ProtosReadCharacteristicRequest *request = [[ProtosReadCharacteristicRequest alloc] initWithData:[data data] error:nil];
+    NSString *remoteId = [request remoteId];
+    @try {
+      // Find peripheral
+      CBPeripheral *peripheral = [self findPeripheral:remoteId];
+      // Find characteristic
+      CBCharacteristic *characteristic = [self locateCharacteristic:[request characteristicUuid] peripheral:peripheral serviceId:[request serviceUuid] secondaryServiceId:[request secondaryServiceUuid]];
+      // Trigger a read
+      [peripheral readValueForCharacteristic:characteristic];
+      result(nil);
+    } @catch(FlutterError *e) {
+      result(e);
+    }
+  } else if([@"readDescriptor" isEqualToString:call.method]) {
+    FlutterStandardTypedData *data = [call arguments];
+    ProtosReadDescriptorRequest *request = [[ProtosReadDescriptorRequest alloc] initWithData:[data data] error:nil];
+    NSString *remoteId = [request remoteId];
+    @try {
+      // Find peripheral
+      CBPeripheral *peripheral = [self findPeripheral:remoteId];
+      // Find characteristic
+      CBCharacteristic *characteristic = [self locateCharacteristic:[request characteristicUuid] peripheral:peripheral serviceId:[request serviceUuid] secondaryServiceId:[request secondaryServiceUuid]];
+      // Find descriptor
+      CBDescriptor *descriptor = [self locateDescriptor:[request descriptorUuid] characteristic:characteristic];
+      [peripheral readValueForDescriptor:descriptor];
+      result(nil);
+    } @catch(FlutterError *e) {
+      result(e);
+    }
+  } else if([@"writeCharacteristic" isEqualToString:call.method]) {
+    FlutterStandardTypedData *data = [call arguments];
+    ProtosWriteCharacteristicRequest *request = [[ProtosWriteCharacteristicRequest alloc] initWithData:[data data] error:nil];
+    NSString *remoteId = [request remoteId];
+    @try {
+      // Find peripheral
+      CBPeripheral *peripheral = [self findPeripheral:remoteId];
+      // Find characteristic
+      CBCharacteristic *characteristic = [self locateCharacteristic:[request characteristicUuid] peripheral:peripheral serviceId:[request serviceUuid] secondaryServiceId:[request secondaryServiceUuid]];
+      // Get correct write type
+      CBCharacteristicWriteType type = ([request writeType] == ProtosWriteCharacteristicRequest_WriteType_WithoutResponse) ? CBCharacteristicWriteWithoutResponse : CBCharacteristicWriteWithResponse;
+      // Write to characteristic
+      [peripheral writeValue:[request value] forCharacteristic:characteristic type:type];
+      result(nil);
+    } @catch(FlutterError *e) {
+      result(e);
+    }
+  } else if([@"writeDescriptor" isEqualToString:call.method]) {
+    FlutterStandardTypedData *data = [call arguments];
+    ProtosWriteDescriptorRequest *request = [[ProtosWriteDescriptorRequest alloc] initWithData:[data data] error:nil];
+    NSString *remoteId = [request remoteId];
+    @try {
+      // Find peripheral
+      CBPeripheral *peripheral = [self findPeripheral:remoteId];
+      // Find characteristic
+      CBCharacteristic *characteristic = [self locateCharacteristic:[request characteristicUuid] peripheral:peripheral serviceId:[request serviceUuid] secondaryServiceId:[request secondaryServiceUuid]];
+      // Find descriptor
+      CBDescriptor *descriptor = [self locateDescriptor:[request descriptorUuid] characteristic:characteristic];
+      // Write descriptor
+      [peripheral writeValue:[request value] forDescriptor:descriptor];
+      result(nil);
+    } @catch(FlutterError *e) {
+      result(e);
+    }
+  } else if([@"setNotification" isEqualToString:call.method]) {
+    FlutterStandardTypedData *data = [call arguments];
+    ProtosSetNotificationRequest *request = [[ProtosSetNotificationRequest alloc] initWithData:[data data] error:nil];
+    NSString *remoteId = [request remoteId];
+    @try {
+      // Find peripheral
+      CBPeripheral *peripheral = [self findPeripheral:remoteId];
+      // Find characteristic
+      CBCharacteristic *characteristic = [self locateCharacteristic:[request characteristicUuid] peripheral:peripheral serviceId:[request serviceUuid] secondaryServiceId:[request secondaryServiceUuid]];
+      // Set notification value
+      [peripheral setNotifyValue:[request enable] forCharacteristic:characteristic];
+      result(nil);
+    } @catch(FlutterError *e) {
+      result(e);
+    }
+  } else {
+    result(FlutterMethodNotImplemented);
+  }
+}
+
+- (CBPeripheral*)findPeripheral:(NSString*)remoteId {
+  NSArray<CBPeripheral*> *peripherals = [_centralManager retrievePeripheralsWithIdentifiers:@[[[NSUUID alloc] initWithUUIDString:remoteId]]];
+  CBPeripheral *peripheral;
+  for(CBPeripheral *p in peripherals) {
+    if([[p.identifier UUIDString] isEqualToString:remoteId]) {
+      peripheral = p;
+      break;
+    }
+  }
+  if(peripheral == nil) {
+    @throw [FlutterError errorWithCode:@"findPeripheral"
+                               message:@"Peripheral not found"
+                               details:nil];
+  }
+  return peripheral;
+}
+
+- (CBCharacteristic*)locateCharacteristic:(NSString*)characteristicId peripheral:(CBPeripheral*)peripheral serviceId:(NSString*)serviceId secondaryServiceId:(NSString*)secondaryServiceId {
+  CBService *primaryService = [self getServiceFromArray:serviceId array:[peripheral services]];
+  if(primaryService == nil || [primaryService isPrimary] == false) {
+    @throw [FlutterError errorWithCode:@"locateCharacteristic"
+                               message:@"service could not be located on the device"
+                               details:nil];
+  }
+  CBService *secondaryService;
+  if(secondaryServiceId.length) {
+    secondaryService = [self getServiceFromArray:secondaryServiceId array:[primaryService includedServices]];
+    @throw [FlutterError errorWithCode:@"locateCharacteristic"
+                               message:@"secondary service could not be located on the device"
+                               details:secondaryServiceId];
+  }
+  CBService *service = (secondaryService != nil) ? secondaryService : primaryService;
+  CBCharacteristic *characteristic = [self getCharacteristicFromArray:characteristicId array:[service characteristics]];
+  if(characteristic == nil) {
+    @throw [FlutterError errorWithCode:@"locateCharacteristic"
+                               message:@"characteristic could not be located on the device"
+                               details:nil];
+  }
+  return characteristic;
+}
+
+- (CBDescriptor*)locateDescriptor:(NSString*)descriptorId characteristic:(CBCharacteristic*)characteristic {
+  CBDescriptor *descriptor = [self getDescriptorFromArray:descriptorId array:[characteristic descriptors]];
+  if(descriptor == nil) {
+    @throw [FlutterError errorWithCode:@"locateDescriptor"
+                               message:@"descriptor could not be located on the device"
+                               details:nil];
+  }
+  return descriptor;
+}
+
+// Reverse search to find primary service
+- (CBService*)findPrimaryService:(CBService*)secondaryService peripheral:(CBPeripheral*)peripheral {
+  for(CBService *s in [peripheral services]) {
+    for(CBService *ss in [s includedServices]) {
+      if([[ss.UUID UUIDString] isEqualToString:[secondaryService.UUID UUIDString]]) {
+        return s;
+      }
+    }
+  }
+  return nil;
+}
+
+- (CBDescriptor*)findCCCDescriptor:(CBCharacteristic*)characteristic {
+  for(CBDescriptor *d in characteristic.descriptors) {
+    if([d.UUID.UUIDString isEqualToString:@"2902"]) {
+      return d;
+    }
+  }
+  return nil;
+}
+
+- (CBService*)getServiceFromArray:(NSString*)uuidString array:(NSArray<CBService*>*)array {
+  for(CBService *s in array) {
+    if([[s UUID] isEqual:[CBUUID UUIDWithString:uuidString]]) {
+      return s;
+    }
+  }
+  return nil;
+}
+
+- (CBCharacteristic*)getCharacteristicFromArray:(NSString*)uuidString array:(NSArray<CBCharacteristic*>*)array {
+  for(CBCharacteristic *c in array) {
+    if([[c UUID] isEqual:[CBUUID UUIDWithString:uuidString]]) {
+      return c;
+    }
+  }
+  return nil;
+}
+
+- (CBDescriptor*)getDescriptorFromArray:(NSString*)uuidString array:(NSArray<CBDescriptor*>*)array {
+  for(CBDescriptor *d in array) {
+    if([[d UUID] isEqual:[CBUUID UUIDWithString:uuidString]]) {
+      return d;
+    }
+  }
+  return nil;
+}
+
+//
+// CBCentralManagerDelegate methods
+//
+- (void)centralManagerDidUpdateState:(nonnull CBCentralManager *)central {
+  if(_stateStreamHandler.sink != nil) {
+    FlutterStandardTypedData *data = [self toFlutterData:[self toBluetoothStateProto:self->_centralManager.state]];
+    self.stateStreamHandler.sink(data);
+  }
+}
+
+- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI {
+  [self.scannedPeripherals setObject:peripheral
+                              forKey:[[peripheral identifier] UUIDString]];
+  if(_scanResultStreamHandler.sink != nil) {
+    FlutterStandardTypedData *data = [self toFlutterData:[self toScanResultProto:peripheral advertisementData:advertisementData RSSI:RSSI]];
+    _scanResultStreamHandler.sink(data);
+  }
+}
+
+- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral {
+  NSLog(@"didConnectPeripheral");
+  // Register self as delegate for peripheral
+  peripheral.delegate = self;
+
+  // Send connection state
+  [_channel invokeMethod:@"DeviceState" arguments:[self toFlutterData:[self toDeviceStateProto:peripheral state:peripheral.state]]];
+}
+
+- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error {
+  NSLog(@"didDisconnectPeripheral");
+  // Unregister self as delegate for peripheral, not working #42
+  peripheral.delegate = nil;
+
+  // Send connection state
+  [_channel invokeMethod:@"DeviceState" arguments:[self toFlutterData:[self toDeviceStateProto:peripheral state:peripheral.state]]];
+}
+
+- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error {
+  // TODO:?
+}
+
+//
+// CBPeripheralDelegate methods
+//
+- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error {
+  NSLog(@"didDiscoverServices");
+  // Loop through and discover characteristics and secondary services
+  [_servicesThatNeedDiscovered addObjectsFromArray:peripheral.services];
+  for(CBService *s in [peripheral services]) {
+    NSLog(@"Found service: %@", [s.UUID UUIDString]);
+    [peripheral discoverCharacteristics:nil forService:s];
+    // [peripheral discoverIncludedServices:nil forService:s]; // Secondary services in the future (#8)
+  }
+}
+
+- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error {
+  NSLog(@"didDiscoverCharacteristicsForService");
+  // Loop through and discover descriptors for characteristics
+  [_servicesThatNeedDiscovered removeObject:service];
+  [_characteristicsThatNeedDiscovered addObjectsFromArray:service.characteristics];
+  for(CBCharacteristic *c in [service characteristics]) {
+    [peripheral discoverDescriptorsForCharacteristic:c];
+  }
+}
+
+- (void)peripheral:(CBPeripheral *)peripheral didDiscoverDescriptorsForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
+  NSLog(@"didDiscoverDescriptorsForCharacteristic");
+  [_characteristicsThatNeedDiscovered removeObject:characteristic];
+  if(_servicesThatNeedDiscovered.count > 0 || _characteristicsThatNeedDiscovered.count > 0) {
+    // Still discovering
+    return;
+  }
+  // Send updated tree
+  if(_servicesDiscoveredStreamHandler.sink != nil) {
+    ProtosDiscoverServicesResult *result = [self toServicesResultProto:peripheral];
+    _servicesDiscoveredStreamHandler.sink([self toFlutterData:result]);
+  }
+}
+
+- (void)peripheral:(CBPeripheral *)peripheral didDiscoverIncludedServicesForService:(CBService *)service error:(NSError *)error {
+  NSLog(@"didDiscoverIncludedServicesForService");
+  // Loop through and discover characteristics for secondary services
+  for(CBService *ss in [service includedServices]) {
+    [peripheral discoverCharacteristics:nil forService:ss];
+  }
+}
+
+- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
+  NSLog(@"didUpdateValueForCharacteristic %@", [peripheral.identifier UUIDString]);
+  if(_characteristicReadStreamHandler.sink != nil) {
+    ProtosReadCharacteristicResponse *result = [[ProtosReadCharacteristicResponse alloc] init];
+    [result setRemoteId:[peripheral.identifier UUIDString]];
+    [result setCharacteristic:[self toCharacteristicProto:characteristic]];
+    _characteristicReadStreamHandler.sink([self toFlutterData:result]);
+  }
+  // on iOS, this method also handle notification values
+  ProtosOnNotificationResponse *result = [[ProtosOnNotificationResponse alloc] init];
+  [result setRemoteId:[peripheral.identifier UUIDString]];
+  [result setCharacteristic:[self toCharacteristicProto:characteristic]];
+  [_channel invokeMethod:@"OnValueChanged" arguments:[self toFlutterData:result]];
+}
+
+- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
+  NSLog(@"didWriteValueForCharacteristic");
+  ProtosWriteCharacteristicRequest *request = [[ProtosWriteCharacteristicRequest alloc] init];
+  [request setRemoteId:[peripheral.identifier UUIDString]];
+  [request setCharacteristicUuid:[characteristic.UUID fullUUIDString]];
+  [request setServiceUuid:[characteristic.service.UUID fullUUIDString]];
+  ProtosWriteCharacteristicResponse *result = [[ProtosWriteCharacteristicResponse alloc] init];
+  [result setRequest:request];
+  [result setSuccess:(error == nil)];
+  [_channel invokeMethod:@"WriteCharacteristicResponse" arguments:[self toFlutterData:result]];
+}
+
+- (void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
+  NSLog(@"didUpdateNotificationStateForCharacteristic");
+  // Read CCC descriptor of characteristic
+  CBDescriptor *cccd = [self findCCCDescriptor:characteristic];
+  if(cccd == nil || error != nil) {
+    // Send error
+    ProtosSetNotificationResponse *response = [[ProtosSetNotificationResponse alloc] init];
+    [response setRemoteId:[peripheral.identifier UUIDString]];
+    [response setCharacteristic:[self toCharacteristicProto:characteristic]];
+    [response setSuccess:false];
+    [_channel invokeMethod:@"SetNotificationResponse" arguments:[self toFlutterData:response]];
+    return;
+  }
+
+  // Request a read
+  [peripheral readValueForDescriptor:cccd];
+}
+
+- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForDescriptor:(CBDescriptor *)descriptor error:(NSError *)error {
+  if(_descriptorReadStreamHandler.sink != nil) {
+    ProtosReadDescriptorRequest *q = [[ProtosReadDescriptorRequest alloc] init];
+    [q setRemoteId:[peripheral.identifier UUIDString]];
+    [q setCharacteristicUuid:[descriptor.characteristic.UUID fullUUIDString]];
+    [q setDescriptorUuid:[descriptor.UUID fullUUIDString]];
+    if([descriptor.characteristic.service isPrimary]) {
+      [q setServiceUuid:[descriptor.characteristic.service.UUID fullUUIDString]];
+    } else {
+      [q setSecondaryServiceUuid:[descriptor.characteristic.service.UUID fullUUIDString]];
+      CBService *primaryService = [self findPrimaryService:[descriptor.characteristic service] peripheral:[descriptor.characteristic.service peripheral]];
+      [q setServiceUuid:[primaryService.UUID fullUUIDString]];
+    }
+    ProtosReadDescriptorResponse *result = [[ProtosReadDescriptorResponse alloc] init];
+    [result setRequest:q];
+    int value = [descriptor.value intValue];
+    [result setValue:[NSData dataWithBytes:&value length:sizeof(value)]];
+    _descriptorReadStreamHandler.sink([self toFlutterData:result]);
+  }
+  // If descriptor is CCCD, send a SetNotificationResponse in case anything is awaiting
+  if([descriptor.UUID.UUIDString isEqualToString:@"2902"]){
+    ProtosSetNotificationResponse *response = [[ProtosSetNotificationResponse alloc] init];
+    [response setRemoteId:[peripheral.identifier UUIDString]];
+    [response setCharacteristic:[self toCharacteristicProto:descriptor.characteristic]];
+    [response setSuccess:true];
+    [_channel invokeMethod:@"SetNotificationResponse" arguments:[self toFlutterData:response]];
+  }
+}
+
+- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForDescriptor:(CBDescriptor *)descriptor error:(NSError *)error {
+  ProtosWriteDescriptorRequest *request = [[ProtosWriteDescriptorRequest alloc] init];
+  [request setRemoteId:[peripheral.identifier UUIDString]];
+  [request setCharacteristicUuid:[descriptor.characteristic.UUID fullUUIDString]];
+  [request setDescriptorUuid:[descriptor.UUID fullUUIDString]];
+  if([descriptor.characteristic.service isPrimary]) {
+    [request setServiceUuid:[descriptor.characteristic.service.UUID fullUUIDString]];
+  } else {
+    [request setSecondaryServiceUuid:[descriptor.characteristic.service.UUID fullUUIDString]];
+    CBService *primaryService = [self findPrimaryService:[descriptor.characteristic service] peripheral:[descriptor.characteristic.service peripheral]];
+    [request setServiceUuid:[primaryService.UUID fullUUIDString]];
+  }
+  ProtosWriteDescriptorResponse *result = [[ProtosWriteDescriptorResponse alloc] init];
+  [result setRequest:request];
+  [result setSuccess:(error == nil)];
+  [_channel invokeMethod:@"WriteDescriptorResponse" arguments:[self toFlutterData:result]];
+}
+
+//
+// Proto Helper methods
+//
+- (FlutterStandardTypedData*)toFlutterData:(GPBMessage*)proto {
+  FlutterStandardTypedData *data = [FlutterStandardTypedData typedDataWithBytes:[[proto data] copy]];
+  return data;
+}
+
+- (ProtosBluetoothState*)toBluetoothStateProto:(CBManagerState)state {
+  ProtosBluetoothState *result = [[ProtosBluetoothState alloc] init];
+  switch(state) {
+    case CBManagerStateResetting:
+      [result setState:ProtosBluetoothState_State_TurningOn];
+      break;
+    case CBManagerStateUnsupported:
+      [result setState:ProtosBluetoothState_State_Unavailable];
+      break;
+    case CBManagerStateUnauthorized:
+      [result setState:ProtosBluetoothState_State_Unauthorized];
+      break;
+    case CBManagerStatePoweredOff:
+      [result setState:ProtosBluetoothState_State_Off];
+      break;
+    case CBManagerStatePoweredOn:
+      [result setState:ProtosBluetoothState_State_On];
+      break;
+    default:
+      [result setState:ProtosBluetoothState_State_Unknown];
+      break;
+  }
+  return result;
+}
+
+- (ProtosScanResult*)toScanResultProto:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI {
+  ProtosScanResult *result = [[ProtosScanResult alloc] init];
+  [result setDevice:[self toDeviceProto:peripheral]];
+  [result setRssi:[RSSI intValue]];
+  ProtosAdvertisementData *ads = [[ProtosAdvertisementData alloc] init];
+  [ads setConnectable:[advertisementData[CBAdvertisementDataIsConnectable] boolValue]];
+  [ads setLocalName:advertisementData[CBAdvertisementDataLocalNameKey]];
+  // Tx Power Level
+  NSNumber *txPower = advertisementData[CBAdvertisementDataTxPowerLevelKey];
+  if(txPower != nil) {
+    ProtosInt32Value *txPowerWrapper = [[ProtosInt32Value alloc] init];
+    [txPowerWrapper setValue:[txPower intValue]];
+    [ads setTxPowerLevel:txPowerWrapper];
+  }
+  // Manufacturer Specific Data
+  NSData *manufData = advertisementData[CBAdvertisementDataManufacturerDataKey];
+  if(manufData.length > 2) {
+    unsigned short manufacturerId;
+    [manufData getBytes:&manufacturerId length:2];
+    [[ads manufacturerData] setObject:[manufData subdataWithRange:NSMakeRange(2, manufData.length - 2)] forKey:manufacturerId];
+  }
+  // Service Data
+  NSDictionary *serviceData = advertisementData[CBAdvertisementDataServiceDataKey];
+  for (CBUUID *uuid in serviceData) {
+    [[ads serviceData] setObject:serviceData[uuid] forKey:uuid.UUIDString];
+  }
+  // Service Uuids
+  NSArray *serviceUuids = advertisementData[CBAdvertisementDataServiceUUIDsKey];
+  for (CBUUID *uuid in serviceUuids) {
+    [[ads serviceUuidsArray] addObject:uuid.UUIDString];
+  }
+  [result setAdvertisementData:ads];
+  return result;
+}
+
+- (ProtosBluetoothDevice*)toDeviceProto:(CBPeripheral *)peripheral {
+  ProtosBluetoothDevice *result = [[ProtosBluetoothDevice alloc] init];
+  [result setName:[peripheral name]];
+  [result setRemoteId:[[peripheral identifier] UUIDString]];
+  [result setType:ProtosBluetoothDevice_Type_Le]; // TODO: Does iOS differentiate?
+  return result;
+}
+
+- (ProtosDeviceStateResponse*)toDeviceStateProto:(CBPeripheral *)peripheral state:(CBPeripheralState)state {
+  ProtosDeviceStateResponse *result = [[ProtosDeviceStateResponse alloc] init];
+  switch(state) {
+    case CBPeripheralStateDisconnected:
+      [result setState:ProtosDeviceStateResponse_BluetoothDeviceState_Disconnected];
+      break;
+    case CBPeripheralStateConnecting:
+      [result setState:ProtosDeviceStateResponse_BluetoothDeviceState_Connecting];
+      break;
+    case CBPeripheralStateConnected:
+      [result setState:ProtosDeviceStateResponse_BluetoothDeviceState_Connected];
+      break;
+    case CBPeripheralStateDisconnecting:
+      [result setState:ProtosDeviceStateResponse_BluetoothDeviceState_Disconnecting];
+      break;
+  }
+  [result setRemoteId:[[peripheral identifier] UUIDString]];
+  return result;
+}
+
+- (ProtosDiscoverServicesResult*)toServicesResultProto:(CBPeripheral *)peripheral {
+  ProtosDiscoverServicesResult *result = [[ProtosDiscoverServicesResult alloc] init];
+  [result setRemoteId:[peripheral.identifier UUIDString]];
+  NSMutableArray *servicesProtos = [NSMutableArray new];
+  for(CBService *s in [peripheral services]) {
+    [servicesProtos addObject:[self toServiceProto:peripheral service:s]];
+  }
+  [result setServicesArray:servicesProtos];
+  return result;
+}
+
+- (ProtosBluetoothService*)toServiceProto:(CBPeripheral *)peripheral service:(CBService *)service  {
+  ProtosBluetoothService *result = [[ProtosBluetoothService alloc] init];
+  NSLog(@"peripheral uuid:%@", [peripheral.identifier UUIDString]);
+  NSLog(@"service uuid:%@", [service.UUID fullUUIDString]);
+  [result setRemoteId:[peripheral.identifier UUIDString]];
+  [result setUuid:[service.UUID fullUUIDString]];
+  [result setIsPrimary:[service isPrimary]];
+
+  // Characteristic Array
+  NSMutableArray *characteristicProtos = [NSMutableArray new];
+  for(CBCharacteristic *c in [service characteristics]) {
+    [characteristicProtos addObject:[self toCharacteristicProto:c]];
+  }
+  [result setCharacteristicsArray:characteristicProtos];
+
+  // Included Services Array
+  NSMutableArray *includedServicesProtos = [NSMutableArray new];
+  for(CBService *s in [service includedServices]) {
+    [includedServicesProtos addObject:[self toServiceProto:peripheral service:s]];
+  }
+  [result setIncludedServicesArray:includedServicesProtos];
+
+  return result;
+}
+
+- (ProtosBluetoothCharacteristic*)toCharacteristicProto:(CBCharacteristic *)characteristic {
+  ProtosBluetoothCharacteristic *result = [[ProtosBluetoothCharacteristic alloc] init];
+  [result setUuid:[characteristic.UUID fullUUIDString]];
+  [result setProperties:[self toCharacteristicPropsProto:characteristic.properties]];
+  [result setValue:[characteristic value]];
+  NSLog(@"uuid: %@ value: %@", [characteristic.UUID fullUUIDString], [characteristic value]);
+  NSMutableArray *descriptorProtos = [NSMutableArray new];
+  for(CBDescriptor *d in [characteristic descriptors]) {
+    [descriptorProtos addObject:[self toDescriptorProto:d]];
+  }
+  [result setDescriptorsArray:descriptorProtos];
+  if([characteristic.service isPrimary]) {
+    [result setServiceUuid:[characteristic.service.UUID fullUUIDString]];
+  } else {
+    // Reverse search to find service and secondary service UUID
+    [result setSecondaryServiceUuid:[characteristic.service.UUID fullUUIDString]];
+    CBService *primaryService = [self findPrimaryService:[characteristic service] peripheral:[characteristic.service peripheral]];
+    [result setServiceUuid:[primaryService.UUID fullUUIDString]];
+  }
+  return result;
+}
+
+- (ProtosBluetoothDescriptor*)toDescriptorProto:(CBDescriptor *)descriptor {
+  ProtosBluetoothDescriptor *result = [[ProtosBluetoothDescriptor alloc] init];
+  [result setUuid:[descriptor.UUID fullUUIDString]];
+  [result setCharacteristicUuid:[descriptor.characteristic.UUID fullUUIDString]];
+  [result setServiceUuid:[descriptor.characteristic.service.UUID fullUUIDString]];
+  int value = [descriptor.value intValue];
+  [result setValue:[NSData dataWithBytes:&value length:sizeof(value)]];
+  return result;
+}
+
+- (ProtosCharacteristicProperties*)toCharacteristicPropsProto:(CBCharacteristicProperties)props {
+  ProtosCharacteristicProperties *result = [[ProtosCharacteristicProperties alloc] init];
+  [result setBroadcast:(props & CBCharacteristicPropertyBroadcast) != 0];
+  [result setRead:(props & CBCharacteristicPropertyRead) != 0];
+  [result setWriteWithoutResponse:(props & CBCharacteristicPropertyWriteWithoutResponse) != 0];
+  [result setWrite:(props & CBCharacteristicPropertyWrite) != 0];
+  [result setNotify:(props & CBCharacteristicPropertyNotify) != 0];
+  [result setIndicate:(props & CBCharacteristicPropertyIndicate) != 0];
+  [result setAuthenticatedSignedWrites:(props & CBCharacteristicPropertyAuthenticatedSignedWrites) != 0];
+  [result setExtendedProperties:(props & CBCharacteristicPropertyExtendedProperties) != 0];
+  [result setNotifyEncryptionRequired:(props & CBCharacteristicPropertyNotifyEncryptionRequired) != 0];
+  [result setIndicateEncryptionRequired:(props & CBCharacteristicPropertyIndicateEncryptionRequired) != 0];
+  return result;
+}
+
+
+- (void)log:(LogLevel)level format:(NSString *)format, ... {
+  if(level <= _logLevel) {
+    va_list args;
+    va_start(args, format);
+//    NSString* formattedMessage = [[NSString alloc] initWithFormat:format arguments:args];
+    NSLog(format, args);
+    va_end(args);
+  }
+}
+
+@end
+
+@implementation FlutterBleStreamHandler
+
+- (FlutterError*)onListenWithArguments:(id)arguments eventSink:(FlutterEventSink)eventSink {
+  self.sink = eventSink;
+  return nil;
+}
+
+- (FlutterError*)onCancelWithArguments:(id)arguments {
+  self.sink = nil;
+  return nil;
+}
+
+@end