/* AUTHOR: Hazim Bitar (techbitar) DATE: Aug 29, 2013 LICENSE: Public domain (use at your own risk) CONTACT: techbitar at gmail dot com (techbitar.com) */ #include SoftwareSerial BTSerial(10, 11); // RX | TX byte byteread; void setup() { pinMode(9, OUTPUT); // this pin will pull the HC-05 pin 34 (key pin) HIGH to switch module to AT mode digitalWrite(9, HIGH); Serial.begin(9600); Serial.println("Enter AT commands:"); BTSerial.begin(38400); // HC-05 default speed in AT command mode } void loop() { // Keep reading from HC-05 and send to Arduino Serial Monitor if (BTSerial.available()) Serial.write(BTSerial.read()); // Keep reading from Arduino Serial Monitor and send to HC-05 if (Serial.available()){ byteread=Serial.read(); BTSerial.write(byteread); Serial.write(byteread); //Echo back the HC-05 command } }