No message received with Code similar to Echo example

[cschuhknecht]

Hi there, I need some help. I've coded something thats very similar to the Echo example. The only major thing i changed is that i send a custom message as soon as the ESP gets power.
I checked the IDs and stuff multiple times.
Here is the code:

#include <TelegramBot.h>
#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>

//------- WiFi Settings -------
const char* ssid = "epiCS-AP";
const char* password = "Password";

// ------- Telegram config --------
const char BotToken[] = "Token";

const char chat_id[] = "ID";

// SSL client
WiFiClientSecure net_ssl;
TelegramBot bot (BotToken, net_ssl);

void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
while(!Serial)

// Attempt to connect to Wifi network:
Serial.print("Connecting Wifi: ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
Serial.println("");
Serial.println("WiFi connected");

bot.begin();
Serial.println("START");
}

void loop() {
Serial.println("ALERT");
delay(2000);
Serial.println("STILL ALERT");

String message = "EINSATZ!";
if(bot.sendMessage(chat_id, message)){
Serial.println("TELEGRAM Successfully sent");
}
else{
Serial.println("TELEGRAM NOT Successfully sent");
}

delay(300000);
}

And here is the Serial output:
epiCS-AP
..................
WiFi connected
START
ALERT
STILL ALERT
TELEGRAM Successfully sent

I don't understand why it doesn't work, but maybe you have a clue.

[SeppPenner]

I guess, I found the problem(s).

First of all, #32 needs to get merged as ArduinoJson 6 has changes made that are not compatible with ArduinoJson 5.

Secondly, the client just doesn't connect:

If you change the following lines in TelegramBot.cpp

void TelegramBot::begin() {
    if(!client->connected()) {
        client->connect(HOST, SSL_PORT);
    }
}

to

void TelegramBot::begin() {
    if(!client->connected()) {
        if(client->connect(HOST, SSL_PORT)) {
            Serial.println("Connected");
        }
        else {
            Serial.println("Connection failed");
        }
    }
}

you will see that the connection always fails. I just still have no idea why this happens...

P.S. Link to the client documentation: https://www.arduino.cc/en/Reference/EthernetClient

I will post updates here once I find out more...

[SeppPenner]

I guess, that Telegram has changed something in their API and that the library (or the Client.h library) can't handle TLS...

[SeppPenner]

@epiCS97
I found the issue... We need to set client.setInsecure(); before connecting when on ESP8266 library > 2.4.2 as there is some bug...

References: schlingensiepen/TelegramBotClient#6 and witnessmenow/Universal-Arduino-Telegram-Bot#104...