ESP32TTGO - Battery Indicator 🔋⚡

ESP32_TTGO/TTGO_Battery_Indicator/TTGO_Battery_Indicator.ino

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+#include <Pangodream_18650_CL.h>
+#include "SPIFFS.h" 
+#include <TFT_eSPI.h>
+#include <TJpg_Decoder.h>
+TFT_eSPI tft = TFT_eSPI();
+
+#define ICON_WIDTH 70
+#define ICON_HEIGHT 36
+#define STATUS_HEIGHT_BAR ICON_HEIGHT
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+#define ICON_POS_X (tft.width() - ICON_WIDTH)
+
+#define MIN_USB_VOL 4.9
+#define ADC_PIN 34
+#define CONV_FACTOR 1.8
+#define READS 20
+
+Pangodream_18650_CL BL(ADC_PIN, CONV_FACTOR, READS);
+char *batteryImages[] = {"/battery_01.jpg", "/battery_02.jpg", "/battery_03.jpg", "/battery_04.jpg", "/battery_05.jpg"};
+                    
+void setup() {
+  Serial.begin(115200);
+  pinoutInit();
+  SPIFFSInit();
+  displayInit();
+  xTaskCreate(battery_info, "battery_info", 2048, NULL, 1, NULL);
+}
+
+void loop() { 
+}
+
+void pinoutInit(){
+  pinMode(14, OUTPUT);
+  digitalWrite(14, HIGH);
+}
+
+void SPIFFSInit(){
+  if (!SPIFFS.begin()) {
+    Serial.println("SPIFFS initialisation failed!");
+    while (1) yield(); // Stay here twiddling thumbs waiting
+  }
+  Serial.println("\r\nInitialisation done.");
+}
+
+void displayInit(){
+  tft.begin();
+  tft.setRotation(1);
+  tft.setTextColor(TFT_WHITE,TFT_BLACK); 
+  tft.fillScreen(TFT_BLACK);
+  tft.setSwapBytes(true);
+  tft.setTextFont(2);
+  TJpgDec.setJpgScale(1);
+  TJpgDec.setCallback(tft_output);
+}
+
+void battery_info(void *arg)
+{
+  while (1) {
+    tft.setCursor (0, STATUS_HEIGHT_BAR);
+    tft.println("");
+    tft.print("Average value from pin: ");
+    tft.println(BL.pinRead());
+    tft.print("Volts: ");
+    tft.println(BL.getBatteryVolts());
+    tft.print("Charge level: ");
+    tft.println(BL.getBatteryChargeLevel());
+    
+    if(BL.getBatteryVolts() >= MIN_USB_VOL){
+      for(int i=0; i< ARRAY_SIZE(batteryImages); i++){
+        drawingBatteryIcon(batteryImages[i]);
+        drawingText("Chrg");
+        vTaskDelay(500);
+      }
+    }else{
+        int imgNum = 0;
+        int batteryLevel = BL.getBatteryChargeLevel();
+        if(batteryLevel >=80){
+          imgNum = 3;
+        }else if(batteryLevel < 80 && batteryLevel >= 50 ){
+          imgNum = 2;
+        }else if(batteryLevel < 50 && batteryLevel >= 20 ){
+          imgNum = 1;
+        }else if(batteryLevel < 20 ){
+          imgNum = 0;
+        }  
+    
+        drawingBatteryIcon(batteryImages[imgNum]);    
+        drawingText(String(batteryLevel) + "%");
+        vTaskDelay(1000);
+    }
+      tft.print("Never Used Stack Size: ");
+      tft.println(uxTaskGetStackHighWaterMark(NULL));
+    }  
+}
+
+void drawingBatteryIcon(String filePath){
+   TJpgDec.drawFsJpg(ICON_POS_X, 0, filePath);
+}
+
+void drawingText(String text){
+  tft.fillRect(0, 0, ICON_POS_X, ICON_HEIGHT,TFT_BLACK);
+  tft.setTextDatum(5);
+  tft.drawString(text, ICON_POS_X-2, STATUS_HEIGHT_BAR/2, 4);
+}
+
+bool tft_output(int16_t x, int16_t y, uint16_t w, uint16_t h, uint16_t* bitmap)
+{
+  if ( y >= tft.height() ) return 0;
+  tft.pushImage(x, y, w, h, bitmap);
+  return 1;
+}