#include "BluetoothSerial.h" //This library has the Bluetooth Capabilities for the program

#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED) //This three lines make sure that the bluetooth is enabled
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it // and ready to connect, if not, it starts again
#endif                                                                        // until it is propperly enabled.

BluetoothSerial SerialBT; //This creates and instance called SerialBT.

void setup() { 
  Serial.begin(115200); //We begin the Serial communication at a baud rate of 115200
  SerialBT.begin("Bbto32"); //This defines the device's name as "Bbto32"
  Serial.println("The device started, now you can pair it with bluetooth!"); //This promt will be printed as soon as the BT is
                                                                            //initialized.
}

void loop() {     //This part of the code will send and recieve data, and print it on the serial monitor.
  if (Serial.available()) {   //Here we are checking if there are any bytes of information recieved in the
    SerialBT.write(Serial.read()); //serial port, if there are any, it sends it via Bluetooth to the other device.
  }                               //SerialBT.write sends the data via Bluetooth.
  if (SerialBT.available()) {     //This part checks if there are any bytes available to read on the serial
    Serial.write(SerialBT.read()); //port, if there are any, they will be printed on the serial monitor.
  }
  delay(20);
}