Mini-Project-Locking-System/code.ino at main · charanmahendaran/Mini-Project-Locking-System · GitHub

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#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>
#include <ESP32Servo.h>

// WiFi credentials
const char* ssid = "YOUR_WIFI_NAME";
const char* password = "YOUR_WIFI_PASSWORD";

// Telegram Bot Token
#define BOT_TOKEN "YOUR_BOT_TOKEN"

// Your Telegram Chat ID
#define CHAT_ID "YOUR_CHAT_ID"

WiFiClientSecure client;
UniversalTelegramBot bot(BOT_TOKEN, client);

// Servo
Servo lockServo;
int servoPin = 13;

// Lock states
bool isLocked = true;

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

  lockServo.attach(servoPin);
  lockDoor();

  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nConnected!");

  client.setInsecure(); // skip certificate validation

  bot.sendMessage(CHAT_ID, "🔐 Lock System Online!", "");
}

void loop() {
  int numNewMessages = bot.getUpdates(bot.last_message_received + 1);

  while (numNewMessages) {
    handleMessages(numNewMessages);
    numNewMessages = bot.getUpdates(bot.last_message_received + 1);
  }

  delay(1000);
}

void handleMessages(int numNewMessages) {
  for (int i = 0; i < numNewMessages; i++) {

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

    if (text == "/start") {
      String welcome = "🔐 Smart Lock System\n\n";
      welcome += "/lock - Lock Door\n";
      welcome += "/unlock - Unlock Door\n";
      welcome += "/status - Check Status";
      bot.sendMessage(chat_id, welcome, "");
    }

    if (text == "/lock") {
      lockDoor();
      bot.sendMessage(chat_id, "🔒 Door Locked", "");
    }

    if (text == "/unlock") {
      unlockDoor();
      bot.sendMessage(chat_id, "🔓 Door Unlocked", "");
    }

    if (text == "/status") {
      if (isLocked)
        bot.sendMessage(chat_id, "Status: 🔒 Locked", "");
      else
        bot.sendMessage(chat_id, "Status: 🔓 Unlocked", "");
    }
  }
}

void lockDoor() {
  lockServo.write(0); // adjust angle
  isLocked = true;
}

void unlockDoor() {
  lockServo.write(90); // adjust angle
  isLocked = false;
}