/*

BlueTooth 藍牙模組

VCC to arduino 5v

GND to arduino GND

RXD to arduino D11

TXD to arduino D10

KEY to arduino 3.3v

*/

#include  <SoftwareSerial.h>

SoftwareSerial BTSerial(10, 11); // RX | TX

void setup()

{

  Serial.begin(9600);

  Serial.println("Enter AT commands:");

  BTSerial.begin(38400);

}

void loop()

{

  if (BTSerial.available())

    Serial.write(BTSerial.read());

  if (Serial.available())

    BTSerial.write(Serial.read());

}