Getting Started with the HC-06 Bluetooth Module

In this video we look at how to get started with the HC-06 Bluetooth transceiver module. The HC-06 is a great low cost way to add wireless communication to any project. Since the HC-06 uses a serial line to communicate it is easy to pair it with an Arduino.

Watch Video on Youtube: https://www.youtube.com/watch?v=ZdvKh3c_yoQ

AT Command	REply from HC-06	COMMENTs
AT	OK	Used to verify communication
AT+VERSION	OKlinvorV1.8	The firmware version
AT+NAMEmyBT	OKsetname	Sets the module name to “myBT”
AT+PIN1234	OKsetPIN	Sets the module PIN to 1234
AT+BAUD1	OK1200	Sets the baud rate to 1200
AT+BAUD2	OK2400	Sets the baud rate to 2400
AT+BAUD3	OK4800	Sets the baud rate to 4800
AT+BAUD4	OK9600	Sets the baud rate to 9600
AT+BAUD5	OK19200	Sets the baud rate to 19200
AT+BAUD6	OK38400	Sets the baud rate to 38400
AT+BAUD7	OK57600	Sets the baud rate to 57600
AT+BAUD8	OK115200	Sets the baud rate to 115200
AT+BAUD9	OK230400	Sets the baud rate to 230400
AT+BAUDA	OK460800	Sets the baud rate to 460800
AT+BAUDB	OK921600	Sets the baud rate to 921600
AT+BAUDC	OK1382400	Sets the baud rate to 1382400

Method 1 Setup

/*This sketch Configures the name and baud rate of an HC 06 Bluetooth module */

char message1[10];//need length of chars being read +1 for null character

char message2[9];

void setup() {

  // set baud rate then delay to give user time to open serial monitor

  Serial.begin(9600);

  delay(5000);

  //Send command to set name of HC06 module, with the below command name will change to "forcetronics"

  Serial.print("AT+NAMEForceT");

  delay(600); //HC06 requires 500 msec for reply

  int8_t count = 0; //declare and intialize count 

  while(1) { //loop until OKsetname is read and cleared from buffer

    if(Serial.available()) {

        message1[count] = Serial.read(); //read in char

        count++; 

        if(count == 9) break; //after we get all 9 char break out of loop

    }

    delay(10);

  }

  

  //Send AT command to change baud rate to 115200

  Serial.print("AT+BAUD8");

  delay(600); //HC06 requires 500 msec for reply

  count = 0; //intialize count

  while(1) { //loop until OK115200 is read and cleared from buffer

    if(Serial.available()) {

        message2[count] = Serial.read(); 

        count++; 

        if(count == 8) break; 

    }

    delay(10);

  }

  

  //print out each message to make sure it worked

  Serial.println("");

  Serial.println(message1);

  Serial.println(message2);

}

void loop() {

 //do nothing

  delay(50);

}

Method 2 Setup

//Example code for testing a serial bluetooth device using Arduino and a serial terminal on a computer

void setup() {

  // set baud rate to match BT module

  Serial.begin(115200);

}

void loop() {

  

  String t; //string to hold data from BT module 

  while(Serial.available()) { //keep reading bytes while they are still more in the buffer

    t += (char)Serial.read(); //read byte, convert to char, and append it to string

  }

  

  if(t.length()) { //if string is not empty do the following

    

    if(t == "Hi Uno\r\n") { Serial.print("Hello Neil\n"); } //say hello

    else if(t == "Meaning of life?\r\n") { //find out the meaning of life

      delay(1000);

      Serial.print("Money. ");

      delay(1000);

      Serial.print("Guns. ");

      delay(1000);

      Serial.print("Hoes.\n");

      delay(1000);

      Serial.print("Arduino.\n");

   }

   else { Serial.print("Syntax Error\n"); } //send this for any other string

  }

   delay(20);

}