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💬Chat App | ESP32 + ESP-NOW + LVGL7 | Part 2/2 - ESP-NOW bidirectional Comm (Primary - Secondary)

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Eric
2020-09-27 14:39:35 -07:00
parent 96303262a4
commit 1d840c5c32
1 changed files with 453 additions and 0 deletions
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ESP32_LVGL/ChatApp_LVGL7/Step_2_ESP-NOW/Step_2_ESP-NOW.ino Normal file
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#include "WiFi.h"
#include <esp_now.h>
#include <lvgl.h>
#include <TFT_eSPI.h>
TFT_eSPI tft = TFT_eSPI();
int screenWidth = 320;
int screenHeight = 480;
static lv_color_t buf[LV_HOR_RES_MAX * LV_VER_RES_MAX / 10];
static lv_disp_buf_t disp_buf;
/* LVGL objects */
static lv_obj_t * bg_top;
static lv_obj_t * bg_middle;
static lv_obj_t * bg_bottom;
static lv_obj_t * bg_keyboard;
static lv_obj_t * kb;
static lv_obj_t * kb_ta;
static lv_obj_t * label_status;
static lv_obj_t * fake_ta;
static lv_obj_t * page;
static lv_obj_t * table;
int itemIdx;
#define CHANNEL 1
enum Role { Primary, Secondary };
Role role = Primary; // Select the role of this device
esp_now_peer_info_t peer;
unsigned long peer_ping_interval = 1 * 1000; // 1sec
unsigned long peer_ping_lasttime = 0;
unsigned long peer_check_interval = 3 * 1000; // 3sec
unsigned long peer_last_packet_time = 0;
/* Display flushing */
void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
{
uint16_t c;
tft.startWrite(); /* Start new TFT transaction */
tft.setAddrWindow(area->x1, area->y1, (area->x2 - area->x1 + 1), (area->y2 - area->y1 + 1)); /* set the working window */
for (int y = area->y1; y <= area->y2; y++) {
for (int x = area->x1; x <= area->x2; x++) {
c = color_p->full;
tft.writeColor(c, 1);
color_p++;
}
}
tft.endWrite(); /* terminate TFT transaction */
lv_disp_flush_ready(disp); /* tell lvgl that flushing is done */
}
bool my_touchpad_read(lv_indev_drv_t * indev_driver, lv_indev_data_t * data)
{
uint16_t touchX, touchY;
bool touched = tft.getTouch(&touchX, &touchY, 600);
if(!touched)
{
return false;
}
if(touchX>screenWidth || touchY > screenHeight)
{
Serial.println("Y or y outside of expected parameters..");
Serial.print("y:");
Serial.print(touchX);
Serial.print(" x:");
Serial.print(touchY);
}
else
{
data->state = touched ? LV_INDEV_STATE_PR : LV_INDEV_STATE_REL;
data->point.x = touchX;
data->point.y = touchY;
}
return false; /*Return `false` because we are not buffering and no more data to read*/
}
void setup() {
Serial.begin(115200);
xTaskCreate(guiTask,
"gui",
4096*2,
NULL,
2,
NULL);
vTaskDelay(500);
xTaskCreate(espnowTask,
"espnowTask",
4096,
NULL,
1,
NULL);
}
void loop() {}
void guiTask(void *pvParameters) {
lv_init();
tft.begin();
tft.setRotation(2);
uint16_t calData[5] = { 295, 3493, 320, 3602, 2 };
tft.setTouch(calData);
lv_disp_buf_init(&disp_buf, buf, NULL, LV_HOR_RES_MAX * LV_VER_RES_MAX / 10);
lv_disp_drv_t disp_drv;
lv_disp_drv_init(&disp_drv);
disp_drv.hor_res = screenWidth;
disp_drv.ver_res = screenHeight;
disp_drv.flush_cb = my_disp_flush;
disp_drv.buffer = &disp_buf;
lv_disp_drv_register(&disp_drv);
lv_indev_drv_t indev_drv;
lv_indev_drv_init(&indev_drv); /*Descriptor of a input device driver*/
indev_drv.type = LV_INDEV_TYPE_POINTER; /*Touch pad is a pointer-like device*/
indev_drv.read_cb = my_touchpad_read; /*Set your driver function*/
lv_indev_drv_register(&indev_drv); /*Finally register the driver*/
lv_main();
while (1) {
lv_task_handler();
}
}
static void lv_main(){
lv_obj_t * scr = lv_obj_create(NULL, NULL);
lv_scr_load(scr);
bg_top = lv_obj_create(scr, NULL);
lv_obj_clean_style_list(bg_top, LV_OBJ_PART_MAIN);
lv_obj_set_style_local_bg_opa(bg_top, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_OPA_COVER);
lv_obj_set_style_local_bg_color(bg_top, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_COLOR_YELLOW);
lv_obj_set_size(bg_top, LV_HOR_RES, 30);
label_status = lv_label_create(bg_top, NULL);
lv_label_set_long_mode(label_status, LV_LABEL_LONG_SROLL_CIRC);
lv_obj_set_width(label_status, LV_HOR_RES - 20);
lv_label_set_text(label_status, "TOP STATUS");
lv_obj_align(label_status, NULL, LV_ALIGN_CENTER, 0, 0);
bg_middle = lv_obj_create(scr, NULL);
lv_obj_clean_style_list(bg_middle, LV_OBJ_PART_MAIN);
lv_obj_set_style_local_bg_opa(bg_middle, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_OPA_COVER);
lv_obj_set_style_local_bg_color(bg_middle, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_COLOR_WHITE);
lv_obj_set_pos(bg_middle, 0, 30);
lv_obj_set_size(bg_middle, LV_HOR_RES, 400);
bg_bottom = lv_obj_create(scr, NULL);
lv_obj_clean_style_list(bg_bottom, LV_OBJ_PART_MAIN);
lv_obj_set_style_local_bg_opa(bg_bottom, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_OPA_COVER);
lv_obj_set_style_local_bg_color(bg_bottom, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_COLOR_ORANGE);
lv_obj_set_pos(bg_bottom, 0, 430);
lv_obj_set_size(bg_bottom, LV_HOR_RES, 50);
fake_ta = lv_textarea_create(bg_bottom, NULL);
lv_textarea_set_text(fake_ta, "Enter a message");
lv_obj_set_pos(fake_ta, 0, 0);
lv_obj_set_size(fake_ta, LV_HOR_RES, 50);
lv_obj_set_event_cb(fake_ta, fake_ta_event_handler);
bg_keyboard = lv_obj_create(scr, NULL);
lv_obj_clean_style_list(bg_bottom, LV_OBJ_PART_MAIN);
lv_obj_set_style_local_bg_opa(bg_keyboard, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_OPA_COVER);
lv_obj_set_style_local_bg_color(bg_keyboard, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_COLOR_WHITE);
lv_obj_set_pos(bg_keyboard, 0, LV_VER_RES - (LV_VER_RES / 2 + 40) );
lv_obj_set_size(bg_keyboard, LV_HOR_RES, LV_VER_RES / 2 + 40);
lv_page();
makeKeyboard();
}
static void lv_page(void)
{
page = lv_page_create(bg_middle, NULL);
lv_obj_clean_style_list(page, LV_OBJ_PART_MAIN);
lv_obj_set_size(page, LV_HOR_RES, 400);
lv_obj_set_pos(page, 0, 0);
//lv_page_set_edge_flash(page, true);
itemIdx = 0;
table = lv_table_create(page, NULL);
lv_obj_clean_style_list(table, LV_OBJ_PART_MAIN);
lv_table_set_col_cnt(table, 2);
lv_obj_set_pos(table, 0, 0);
lv_obj_set_click(table, false);
}
static void fake_ta_event_handler(lv_obj_t * obj, lv_event_t event)
{
if(event == LV_EVENT_CLICKED) {
lv_obj_move_foreground(bg_keyboard);
lv_obj_set_height(page, 180);
scrollToEndOfTable();
}
}
static void scrollToEndOfTable(){
float tableHeight = lv_obj_get_height(table);
printf("tableHeight: %f\n", tableHeight);
lv_page_scroll_ver(page, -tableHeight);
}
static void updateTopStatus(lv_color_t color, String text){
lv_obj_set_style_local_bg_color(bg_top, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,color);
lv_label_set_text(label_status, text.c_str());
}
static void makeKeyboard(){
kb_ta = lv_textarea_create(bg_keyboard, NULL);
lv_obj_set_size(kb_ta, LV_HOR_RES, 40);
lv_obj_set_pos(kb_ta, 0, 0);
lv_textarea_set_text(kb_ta, "");
kb = lv_keyboard_create(bg_keyboard, NULL);
lv_obj_set_size(kb, LV_HOR_RES, LV_VER_RES / 2);
lv_obj_set_pos(kb, 0, 40);
lv_keyboard_set_cursor_manage(kb, true);
lv_keyboard_set_textarea(kb, kb_ta);
lv_obj_set_event_cb(kb, keyboard_event_cb);
lv_obj_move_background(bg_keyboard);
}
static void keyboard_event_cb(lv_obj_t * kb, lv_event_t event){
lv_keyboard_def_event_cb(kb, event);
if(event == LV_EVENT_APPLY){
lv_obj_move_background(bg_keyboard);
lv_obj_set_height(page, 400);
//updateTable(true, lv_textarea_get_text(kb_ta));
checkPeerToSendMsg(lv_textarea_get_text(kb_ta));
scrollToEndOfTable();
lv_textarea_set_text(kb_ta, "");
}else if(event == LV_EVENT_CANCEL){
lv_obj_move_background(bg_keyboard);
lv_obj_set_height(page, 400);
}
}
static void updateTable(bool isMine, String msg){
msg.trim();
if(msg.length() > 0){
lv_table_set_row_cnt(table, (itemIdx+1));
lv_table_set_col_width(table, itemIdx, LV_HOR_RES/2 - 10);
lv_table_set_cell_align(table, itemIdx, isMine? 1 : 0, isMine? LV_LABEL_ALIGN_RIGHT : LV_LABEL_ALIGN_LEFT);
lv_table_set_cell_value(table, itemIdx, isMine? 1 : 0, msg.c_str());
itemIdx++;
scrollToEndOfTable();
}
}
/*
* ESP-NOW TASK
*/
void espnowTask(void *pvParameters) {
vTaskDelay(1000);
if(role == Primary){
Serial.println("[Primary Mode]");
WiFi.mode(WIFI_STA);
}else{
Serial.println("[Secondary Mode]");
WiFi.mode(WIFI_AP_STA);
configDeviceAP();
}
InitESPNow();
esp_now_register_recv_cb(OnDataRecv);
while (1) {
if(role == Primary){
ScanForPeer();
}
sendPing();
checkLastPacket();
vTaskDelay(50);
}
}
void configDeviceAP() {
String Prefix = "Peer:";
String Mac = WiFi.macAddress();
Serial.print("AP MAC: ");
Serial.println(Mac);
String SSID = Prefix + Mac;
String Password = "123456789";
bool result = WiFi.softAP(SSID.c_str(), Password.c_str(), CHANNEL, 0);
if (!result) {
Serial.println("AP Config failed.");
ESP.restart();
} else {
Serial.println("AP Config Success. Broadcasting with AP: " + String(SSID));
}
}
void InitESPNow() {
WiFi.disconnect();
if (esp_now_init() == 0) {
Serial.println("ESPNow Init Success");
updateTopStatus(LV_COLOR_CYAN, "- ESP-NOW READY -");
}
else {
Serial.println("ESPNow Init Failed");
ESP.restart();
}
}
void OnDataRecv(const uint8_t *mac_addr, const uint8_t *data, int data_len) {
if(role == Secondary && *peer.peer_addr == NULL){
char macAddr[6];
sprintf(macAddr, "%02X:%02X:%02X:%02X:%02X:%02X",mac_addr[0],mac_addr[1],mac_addr[2],mac_addr[3],mac_addr[4],mac_addr[5]);
memcpy(&peer.peer_addr, macAddr, 6 );
peer.channel = CHANNEL;
peer.encrypt = 0;
const esp_now_peer_info_t *peerNode = &peer;
esp_err_t addStatus = esp_now_add_peer(peerNode);
if (addStatus == 0) {
updateTopStatus(LV_COLOR_SILVER, "- Connected -");
checkPeerToSendMsg("Hello Primary Peer!");
}
}
String receivedString = (char*)data;
receivedString.trim();
if(receivedString.length() > 0){
updateTable(false, receivedString);
}
peer_last_packet_time = millis();
}
void checkPeerToSendMsg(String msg){
msg.trim();
if(msg.length() == 0){
return;
}
if(*peer.peer_addr == NULL){
Serial.print("peer.peer_addr == NULL");
return;
}
bool sentResult = sendMsgToPeer(peer.peer_addr, msg);
if(sentResult){
updateTable(true, msg);
}
}
bool sendMsgToPeer(uint8_t *peer_addr, String msg){
byte byteMsg[msg.length()+1];
msg.getBytes(byteMsg, msg.length()+1);
esp_err_t result = esp_now_send(peer_addr, (uint8_t *) byteMsg, sizeof(byteMsg));
return !result;
}
void ScanForPeer() {
if(*peer.peer_addr != NULL){
return;
}
int8_t scanResults = WiFi.scanNetworks();
if (scanResults > 0) {
for (int i = 0; i < scanResults; ++i) {
String SSID = WiFi.SSID(i);
String BSSIDstr = WiFi.BSSIDstr(i);
vTaskDelay(10);
if (SSID.indexOf("Peer") == 0) {
int mac[6];
if ( 6 == sscanf(BSSIDstr.c_str(), "%x:%x:%x:%x:%x:%x", &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5] ) ) {
char macAddr[6];
sprintf(macAddr, "%02X:%02X:%02X:%02X:%02X:%02X",mac[0],mac[1],mac[2],mac[3],mac[4],mac[5]);
esp_now_peer_info_t temp;
memcpy( &temp.peer_addr, macAddr, 6 );
if(esp_now_is_peer_exist(temp.peer_addr)){
Serial.println("Existed Peer!");
continue;
}
memcpy(&peer.peer_addr, macAddr, 6 );
peer.channel = CHANNEL;
peer.encrypt = 0;
const esp_now_peer_info_t *peerNode = &peer;
if(esp_now_add_peer(peerNode) != ESP_OK){
Serial.println("Failed to add peer");
continue;
}
updateTopStatus(LV_COLOR_SILVER, "- Connected -");
checkPeerToSendMsg("Hello There~");
}
}
}
}
WiFi.scanDelete();
vTaskDelay(1000);
}
void sendPing(){
if (millis() > peer_ping_lasttime + peer_ping_interval) {
if(*peer.peer_addr != NULL){
byte pingByteMsg[1];
String pingMsg = " ";
pingMsg.getBytes(pingByteMsg, pingMsg.length());
esp_now_send(peer.peer_addr, (uint8_t *) pingByteMsg, sizeof(pingByteMsg));
}
peer_ping_lasttime = millis();
}
}
void checkLastPacket(){
if(*peer.peer_addr != NULL){
unsigned long sinceLastPacket = millis() - peer_last_packet_time;
if(sinceLastPacket > peer_check_interval){
delPeer();
*peer.peer_addr = NULL;
updateTopStatus(LV_COLOR_ORANGE, "- Peer Disconnected! -");
}
}
}
void delPeer(){
esp_now_del_peer(peer.peer_addr);
}