#include <BluetoothSerial.h>
#define ledPIN 2
BluetoothSerial SerialBT;
byte BTData;
/* Check if Bluetooth configurations are enabled in the SDK */
#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif
void setup()
{
pinMode(ledPIN, OUTPUT);
  Serial.begin(115200);
  SerialBT.begin();
  Serial.println("Bluetooth Started! Ready to pair...");
}
void loop()
{
if(SerialBT.available())
  {
    BTData = SerialBT.read();
              Serial.println("available");

              Serial.println(BTData);

    Serial.write(BTData);


  }
/* If received Character is 1, then turn ON the LED */
/* You can also compare the received data with decimal equivalent */
/* 48 for 0 and 49 for 1 */
/* if(BTData == 48) or if(BTData == 49) */
if(BTData == '1')
  {

  Serial.println(BTData);

digitalWrite(ledPIN, HIGH);
  }
/* If received Character is 0, then turn OFF the LED */
if(BTData == '0')
  {

      Serial.println(BTData);

digitalWrite(ledPIN, LOW);
  }
}