Hi friends welcome to meworkstelugu friends in this section we learn about how to interface esp32 with a telegram bot
Esp32 is a powerful microcontroller that can be used in various applications. In this blog post, we will be showing you how to use the Telegram bot to control Esp32 remotely.
the below video will help to do this project this video very useful for you
Telegram bot setup :
First, you need a telegram account so if you don't have a telegram account simply download the telegram app from the play store or app store and create a new account and follow the below steps
Search on telegram BotFather then below telegram group will be seen. The original bot father telegram group has verification Mark click on the group and press start
The below figure show the remaining information
after clicking the start button below options will appear
Then click on the newbot the option available on the first in (/newbot-crate new bot)Then below option appear now here we give the bot name give your bot name what you and here I am giving meworkstelugu
After giving the bot name now here we provide the user name for the bot the user name must end with the bot so I am giving mewoks_bot
Here we get the HTTP toke for the bot and bot link. copy the token and paste it into the Arduino code
ow we create the bot successfully but this bot can access by anyone so follow these steps to access the bot only you
search on telegram id bot. Then this channel appear
Click on start
And click on get you will get the id .
This id also needs to paste on the Arduino code
Esp 32 with the Telegram code:
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h> // Universal Telegram Bot Library written by Brian Lough: https://github.com/witnessmenow/Universal-Arduino-Telegram-Bot
#include <ArduinoJson.h>
// Replace with your network credentials
const char* ssid = "xxxx";
const char* password = "xxx";
// Initialize Telegram BOT
#define BOTtoken "your bot http toke" // your Bot Token (Get from Botfather)
// Use @myidbot 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
#define CHAT_ID "idbot toke"
#ifdef ESP8266
X509List cert(TELEGRAM_CERTIFICATE_ROOT);
#endif
WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken, client);
// Checks for new messages every 1 second.
int botRequestDelay = 1000;
unsigned long lastTimeBotRan;
const int ledPin = 14;
bool ledState = LOW;
// Handle what happens when you receive new messages
void handleNewMessages(int numNewMessages) {
Serial.println("handleNewMessages");
Serial.println(String(numNewMessages));
for (int i=0; i<numNewMessages; i++) {
// Chat id of the requester
String chat_id = String(bot.messages[i].chat_id);
if (chat_id != CHAT_ID){
bot.sendMessage(chat_id, "Unauthorized user", "");
continue;
}
// Print the received message
String text = bot.messages[i].text;
Serial.println(text);
String from_name = bot.messages[i].from_name;
if (text == "/start") {
String welcome = "Welcome, " + from_name + ".\n";
welcome += "meworkstelugu\n\n";
welcome += "Use the following commands to control your outputs.\n\n";
welcome += "/led_on to turn GPIO ON \n";
welcome += "/led_off to turn GPIO OFF \n";
welcome += "/state to request current GPIO state \n";
bot.sendMessage(chat_id, welcome, "");
}
if (text == "/led_on") {
bot.sendMessage(chat_id, "LED state set to ON", "");
ledState = HIGH;
digitalWrite(ledPin, ledState);
}
if (text == "/led_off") {
bot.sendMessage(chat_id, "LED state set to OFF", "");
ledState = LOW;
digitalWrite(ledPin, ledState);
}
if (text == "/state") {
if (digitalRead(ledPin)){
bot.sendMessage(chat_id, "LED is ON", "");
}
else{
bot.sendMessage(chat_id, "LED is OFF", "");
}
}
}
}
void setup() {
Serial.begin(115200);
#ifdef ESP8266
configTime(0, 0, "pool.ntp.org"); // get UTC time via NTP
client.setTrustAnchors(&cert); // Add root certificate for api.telegram.org
#endif
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, ledState);
// Connect to Wi-Fi
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
#ifdef ESP32
client.setCACert(TELEGRAM_CERTIFICATE_ROOT); // Add root certificate for api.telegram.org
#endif
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi..");
}
// Print ESP32 Local IP Address
Serial.println(WiFi.localIP());
}
void loop() {
if (millis() > lastTimeBotRan + botRequestDelay) {
int numNewMessages = bot.getUpdates(bot.last_message_received + 1);
while(numNewMessages) {
Serial.println("got response");
handleNewMessages(numNewMessages);
numNewMessages = bot.getUpdates(bot.last_message_received + 1);
}
lastTimeBotRan = millis();
}
}
if you have any doubts regarding this project, contact me on Instagram or comment on the YouTube video. I will help my best.
0 Comments