Add multiple User_ID

[DrSaad77]

Hello, it is more a help requested than an issue.
Can somebody please let me know how to add another User_ID at line #36 ??
there: #define CHAT_ID "XXXXXXXXXX"

I want to add more than 1 Telegram number/ User_ID, meaning, being able to receive notification from Arduino to multiple devices.
Should I maybe repeat this line with the others ID ??

Thx guys

[Esque123]

1. You can create a list with the user ID's. eg.
   const String authorized_chat_ids[] = { "3333333", "4444444" };

2. Then you need to be able to get the dynamic size of the list, so that the bot can latter iterate through the ID's.
   const int numberUsers = sizeof(authorized_chat_ids) / sizeof(authorized_chat_ids[0]);

3. Then create a check function to verify new messages from users against the list that you created in step 1.
   bool isValidUser(String chat_id, String from_name)
   {
   for (int i = 0; i < numberUsers; i++) {
   if (authorized_chat_ids[i] == (chat_id)) {
   Serial.println(from_name + " is a valid user");
   return true;
   break;
   }
   }
   Serial.println(from_name + " is NOT a valid User!");
   return false;
   }

4. Lastly under the "void handleNewMessages()" function, send messages to all authotized users.

   for (int i = 0; i < numNewMessages; i++) {
   String chat_id = bot.messages[i].chat_id;
   String from_name = bot.messages[i].from_name;
   if (isValidUser(chat_id, from_name)) {

        String text = bot.messages[i].text;
   

Hope this helps!

[DrSaad77]

3. bool isValidUser(String chat_id, String from_name)
{
for (int i = 0; i < numberUsers; i++) {
if (authorized_chat_ids[i] == (chat_id)) {
Serial.println(from_name + " is a valid user");
return true;
break;
}
}
Serial.println(from_name + " is NOT a valid User!");
return false;
}

Thx you very much fror your support.
I wish to make a bot on ESP8622 connected to main GRID Power and get notificated when it is available on more than 1 device through Telegram. I am a novice at coding or arduino script... Anyway, I tried to follow your help, but could not apply point 4, under the "void handleNewMessages()" function, could not find it.

This is what I came out as a script:

#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>

// Wifi network station credentials
#define WIFI_SSID "MYWIFI"
#define WIFI_PASSWORD "xxxxxxxxxx"
// Telegram BOT Token (Get from Botfather)
#define BOT_TOKEN "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

// Use @MyidBot (IDBot) to find out the chat ID of an individual or a group
// Also note that you need to click "start" on a bot before it can
// message you

const String authorized_chat_ids[] = { "11111111", "22222222" };

const int numberUsers = sizeof(authorized_chat_ids) / sizeof(authorized_chat_ids[0]);

bool isValidUser(String chat_id, String from_name)
{
for (int i = 0; i < numberUsers; i++) {
if (authorized_chat_ids[i] == (chat_id)) {
Serial.println(from_name + " is a valid user");
return true;
break;
}
}
Serial.println(from_name + " is NOT a valid User!");
return false;
}

X509List cert(TELEGRAM_CERTIFICATE_ROOT);
WiFiClientSecure secured_client;
UniversalTelegramBot bot(BOT_TOKEN, secured_client);

void setup() {
Serial.begin(115200);
Serial.println();

// attempt to connect to Wifi network:
Serial.print("Connecting to Wifi SSID ");
Serial.print(WIFI_SSID);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
secured_client.setTrustAnchors(&cert); // Add root certificate for api.telegram.org
while (WiFi.status() != WL_CONNECTED)
{
Serial.print(".");
delay(500);
}
Serial.print("\nWiFi connected. IP address: ");
Serial.println(WiFi.localIP());

Serial.print("Retrieving time: ");
configTime(0, 0, "pool.ntp.org"); // get UTC time via NTP
time_t now = time(nullptr);
while (now < 24 * 3600)
{
Serial.print(".");
delay(100);
now = time(nullptr);
}
Serial.println(now);

bot.sendMessage(CHAT_ID, "Bot started up", "");
delay(15000);
bot.sendMessage(CHAT_ID, "GRID is available !", "");
}

void loop() {

}

I tried to compile the code without point 4, and get this error:
"CHAT_ID' was not declared in this scope"

Can you please take a look at the script and correct stuff, to be able to use it with 2 user_ID, and this way , I would be able to replicate it for 3 or more user.
Thx you very much.

[witnessmenow]

This is a user level thing

const String authorized_chat_ids[] = { "11111111", "22222222" };
const int num_chat_ids = 2;

...
...

bool sendToAllUsers(String message){
    bool allResponse = true;
    for(int i =0; i< num_chat_ids ; i++){
        allResponse = bot.sendMessage(authorized_chat_ids[i], message, "") && allResponse; //if one fails, all response will be false
    }
    return false;
}