Problem with ESP32 Telegram Bot not responding

Community General Discussion
1

Hello, my ESP32 Telegram Bot is not responding to any commands I send. My code retrieves the bot name from the token, but it is not responding to any command, such as /light_on.

The code is the following:

#define USE_CLIENTSSL false  

#include <AsyncTelegram2.h>
// Timezone definition
#include <time.h>
#define MYTZ "CET-1CEST,M3.5.0,M10.5.0/3"

#ifdef ESP8266
  #include <ESP8266WiFi.h>
  BearSSL::WiFiClientSecure client;
  BearSSL::Session   session;
  BearSSL::X509List  certificate(telegram_cert);
  
#elif defined(ESP32)
  #include <WiFi.h>
  #include <WiFiClient.h>
  #if USE_CLIENTSSL
    #include <SSLClient.h>  
    #include "tg_certificate.h"
    WiFiClient base_client;
    SSLClient client(base_client, TAs, (size_t)TAs_NUM, A0, 1, SSLClient::SSL_ERROR);
  #else
    #include <WiFiClientSecure.h>
    WiFiClientSecure client;    
  #endif
#endif


AsyncTelegram2 myBot(client);
const char* ssid  =  "***********";     // SSID WiFi network
const char* pass  =  "**********";     // Password  WiFi network
const char* token =  "*******:***********************";  // Telegram token

const uint8_t LED = LED_BUILTIN;

void setup() {
  // initialize the Serial
  Serial.begin(115200);
  Serial.println("\nStarting TelegramBot...");

  // set the pin connected to the LED to act as output pin
  pinMode(LED, OUTPUT);
  digitalWrite(LED, HIGH); // turn off the led (inverted logic!)

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, pass);
  delay(500);
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print('.');
    delay(500);
  }

#ifdef ESP8266
  // Sync time with NTP, to check properly Telegram certificate
  configTime(MYTZ, "time.google.com", "time.windows.com", "pool.ntp.org");
  //Set certficate, session and some other base client properies
  client.setSession(&session);
  client.setTrustAnchors(&certificate);
  client.setBufferSizes(1024, 1024);
#elif defined(ESP32)
  // Sync time with NTP
  configTzTime(MYTZ, "time.google.com", "time.windows.com", "pool.ntp.org");
  #if USE_CLIENTSSL == false
    client.setCACert(telegram_cert);
  #endif
#endif

  // Set the Telegram bot properies
  myBot.setUpdateTime(1000);
  myBot.setTelegramToken(token);

  // Check if all things are ok
  Serial.print("\nTest Telegram connection... ");
  myBot.begin() ? Serial.println("OK") : Serial.println("NOK");

  Serial.print("Bot name: @");
  Serial.println(myBot.getBotName());
}

void loop() {
  // local variable to store telegram message data
  TBMessage msg;
  
  // if there is an incoming message...
  if (myBot.getNewMessage(msg)) {
    String msgText = msg.text;

    if (msgText.equals("/light_on")) {                 // if the received message is "LIGHT ON"...
      digitalWrite(LED, LOW);                          // turn on the LED (inverted logic!)
      myBot.sendMessage(msg, "Light is now ON");       // notify the sender
    }
    else if (msgText.equals("/light_off")) {           // if the received message is "LIGHT OFF"...
      digitalWrite(LED, HIGH);                          // turn off the led (inverted logic!)
      myBot.sendMessage(msg, "Light is now OFF");       // notify the sender
    }
    else {                                              // otherwise...
      // generate the message for the sender
      String reply;
      reply = "Welcome " ;
      reply += msg.sender.username;
      reply += ".\nTry /light_on or /light_off ";
      myBot.sendMessage(msg, reply);                    // and send it
    }
  }

}

Also i had a ESP8266 bot code that worked one year ago but it's also not working anymore.

Thanks

2

What is the serial monitor output ?

3

.....
16:36:26.456 -> Test Telegram connection... OK
16:36:27.146 -> Bot name: @test_bot

4

I would start by adding the following 3 lines of serial output. That will tell you whether or not you are receiving a message, and if so, what that message is.

void loop() {
  // local variable to store telegram message data
  TBMessage msg;
  
  // if there is an incoming message...
  if (myBot.getNewMessage(msg)) {
    String msgText = msg.text;
     Serial.print("Yes Message : ");
     Serial.println(msgText);

    if (msgText.equals("/light_on")) {                 // if the received message is "LIGHT ON"...
      digitalWrite(LED, LOW);                          // turn on the LED (inverted logic!)
      myBot.sendMessage(msg, "Light is now ON");       // notify the sender
    }
    else if (msgText.equals("/light_off")) {           // if the received message is "LIGHT OFF"...
      digitalWrite(LED, HIGH);                          // turn off the led (inverted logic!)
      myBot.sendMessage(msg, "Light is now OFF");       // notify the sender
    }
    else {                                              // otherwise...
      // generate the message for the sender
      String reply;
      reply = "Welcome " ;
      reply += msg.sender.username;
      reply += ".\nTry /light_on or /light_off ";
      myBot.sendMessage(msg, reply);                    // and send it
    }
  }
     Serial.println("No Message");
}
5

Hi @grumpy_oleg
On which core version are you running this code?

I've just tried on latest version 2.0.14 and it works as expected.