#include <BluetoothSerial.h>

BluetoothSerial SerialBT;

const int ledPin = 2;  // Internal LED on ESP32 Dev Kit v1

void setup() {
  Serial.begin(115200);
  SerialBT.begin("ESP32_BT"); // Bluetooth device name
  pinMode(ledPin, OUTPUT);
}

void loop() {
  if (SerialBT.available()) {
    char command = SerialBT.read();

    // Process the received command
    if (command == 'N') {  // 'N' for TURN ON
      digitalWrite(ledPin, HIGH); // Turn on the LED
      Serial.println("LED turned ON");
    } else if (command == 'F') {  // 'F' for TURN OFF
      digitalWrite(ledPin, LOW);  // Turn off the LED
      Serial.println("LED turned OFF");
    }
  }

  if (Serial.available()) {
    char outgoingChar = Serial.read();
    SerialBT.print(outgoingChar);
  }
}