#include < SoftwareSerial.h >

const int ledPin = 0; // GPIO pin for the LED
SoftwareSerial bluetoothSerial(3, 4); // RX, TX pins for HC-05

void setup() {
    Serial.begin(9600);          // Initialize the serial communication for debugging
    bluetoothSerial.begin(9600); // Initialize Bluetooth serial communication
    pinMode(ledPin, OUTPUT);      // Set the LED pin as an output
}

void loop() {
    if (bluetoothSerial.available() > 0) {
    char command = bluetoothSerial.read();

    // Toggle LED based on received command
    if (command == '1') {
        digitalWrite(ledPin, HIGH); // Turn on LED
        Serial.println("LED ON");
    } else if (command == '0') {
        digitalWrite(ledPin, LOW);  // Turn off LED
        Serial.println("LED OFF");
    }
  }
}