#include <SoftwareSerial.h>

SoftwareSerial BTSerial(10, 11); // RX, TX pins for Bluetooth communication

int buzzerPin = 9;  // Pin connected to the buzzer

char command;  // Variable to store the Bluetooth command

void setup() {
  pinMode(buzzerPin, OUTPUT); // Set buzzer pin as output
  Serial.begin(9600);   // Start serial communication
  BTSerial.begin(9600); // Start Bluetooth communication
}

void loop() {
  if (BTSerial.available()) {
    command = BTSerial.read();  // Read the Bluetooth command

    if (command == 'L') {
      digitalWrite(buzzerPin, HIGH);  // Turn the buzzer on
      Serial.println("Buzzer ON");
    } else if (command == 'R') {
      digitalWrite(buzzerPin, LOW);   // Turn the buzzer off
      Serial.println("Buzzer OFF");
    }
  }
}