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HC-06 Bluetooth Serial Module (HCARDU0004 & HCARDU0064) 
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Site Admin

Joined: Sun Aug 05, 2012 4:02 pm
Posts: 670
Post HC-06 Bluetooth Serial Module (HCARDU0004 & HCARDU0064)
Image

HC-06 Arduino Bluetooth Wireless Serial Port Module. These modules are available in master (HCARDU0064) and slave (HCARDU0004) versions. Please see FAQ section before purchasing one of these modules.

The slave module can be purchased here.
The master module can be purchased here.


Default password: 1234

Baud rate: 9600

Dimensions: 1.73 in x 0.63 in x 0.28 in (4.4 cm x 1.6 cm x 0.7 cm)


    PINOUT
    1.....VCC
    2.....GND
    3.....TXD
    4.....RXD


AT Commands:

Module must be disconnected (Led flashing) to issue AT commands.

Communication Test :
Send: AT
Response: OK

Change Baud Rate:
Send: AT+BAUD<b>

<b>......Baud
1......1200
2......2400
3......4800
4......9600
5......19200
6......38400
7......57600
8......115200

E.g.
Send: AT+BAUD7
Response: OK57600

Change Bluetooth Device Name:
Send: AT+NAME<devicename>

E.g.
Send: AT+NAMEHobbComp
Response: OKHobbyComp


Change Pincode:
Send : AT+PINxxxx
Response: OKsetpin


FAQ:

What version of firmware do these modules have?

They are V1.06 HC-06

Can a slave device be a master?

No, they are fixed to either a master or a slave, you need to purchase the appropriate one.

What is the purpose of the red LED?

The LED indicates the current link status of the module.

Flashing = Not connected
Solid = Connected

What is the difference between a master and slave module?

The slave module is intended for communicating with other Bluetooth devices such as a laptop or smart phone. The master device is intended ONLY for communicating with a slave module. By default it will automatically pair with a slave module with no software interaction.

I have purchased a master module but why can't I get it to pair with my computer?

Please see previous question.

I have paired my computer to a slave so why is the modules LED still blinking?

Although your computer may have successfully paired with the slave module, it may not sustain a link unless you open a serial terminal connection on your computer.

When I send an AT command the module doesn’t respond and the command just appears at the remote end, why is this?

When the modules are connected they switch to a transparent mode and will not respond to AT commands. To issue an AT command you must be disconnected (LED flashing)

Is there any way for my program to know when I am connected?

Other that writing a 'ping' response into your program, the easiest way is to just issue the at command 'AT'. If you receive an OK back from the module then you are not currently connected to another device.

Can a master connect to more that one slave?

No, you can only connect to one slave module at any one time.

I have several slave modules, can I switch the master from one module to another?

Yes but in a roundabout way... Both master and slave modules accept an AT command (AT+PIN) to allow their pin code to be changed. By giving each slave module a unique pin code the master module will only connect to a slave that has a matching pin code. You can change the pin code on the master module to match the one on the slave that you wish to connect to. The only issue with this is that you cannot issue AT commands to the master whilst it is currently connected to a slave. Therefore you will either need to move the master out of range of the connected slave or cycle the masters power supply and then immediately issue a pin number change. By powering the master module via a transistor this could be done in software using a DIO pin.


Code:
/* FILE:    ARD_BLUETOOTH_SERIAL_MODULE_HCARDU0004_Example.pde
   DATE:    17/07/12
   VERSION: 0.1

This is a simple example of how to use the HobbyComponents Bluetooth serial
module (HCARDU0004). This module allows communication from an Arduino dev
board to a Bluetooth enabled device. The module communicates with an Arduino
device via a simple two wire serial protocol. If you choose to use the modules
default settings then the module requires no setting up to communicate with it,
just connect to the Arduino. The device defaults to 9600 baud, 8 data bits,
and 1 stop bit. The baud rate, amongst other settings can be changed using
standard AT commands via its serial interface.

This sketch demonstrates an example of how to communicate with the
device using a software serial interface using just two DIO lines to interface
with the module. The program will pass-through for any data sent to and from
the device to the Arduino's hardware serial interface. This will allow you to
communicate with any device paired with the module via Arduino IDE's built in
serial port monitor.


SENSOR PINOUT:

PIN 1: KEY
PIN 2: VCC
PIN 3: GND
PIN 4: TXD
PIN 5: RXD


SETUP INSTRUCTIONS:

Connect the Bluetooth module as follows:

Arduino       Bluetooth module
5V            PIN 2 (VCC)
GND           PIN 3 (GND)
DIO 10        PIN 4 (TXD)
DIO 11        PIN 5 (RXD)

You will require the NewSoftSerial library available at the following location,
which will provide the functions required for the software serial port:

http://arduiniana.org/libraries/newsoftserial/

If you are using Arduino V1.0 or above, this library is now integrated into
the core and therefore does not need to be downloaded. Instead just change all
NewSoftSerial references to SoftwareSerial.

Compile the sketch and upload to your Arduino.

Pair your Bluetooth enabled device with the Bluetooth module using PASSCODE: 1234
(you do not need to do anything on the module side to do this).

Open up the serial port monitor in the Arduino IDE (CTRL+SHIF+M).

You will now be able to communicate with the paired Bluetooth device.


You may copy, alter and reuse this code in any way you like but please leave
reference to HobbyComponents.com in your comments if you redistribute this code. */



/* Include the software serial port library */
#include <NewSoftSerial.h>

/* DIO used to communicate with the Bluetooth module's TXD pin */
#define BT_SERIAL_RX_DIO 10
/* DIO used to communicate with the Bluetooth module's RXD pin */
#define BT_SERIAL_TX_DIO 11

/* Initialise the software serial port */
NewSoftSerial BluetoothSerial(BT_SERIAL_RX_DIO, BT_SERIAL_TX_DIO); // RX, TX


void setup() 
{
  /* Set the baud rate for the hardware serial port */
  Serial.begin(9600);
  /* Set the baud rate for the software serial port */
  BluetoothSerial.begin(9600);

}

/* Main loop that will pass any data to and from the Bluetooth mode to the
   host PC */
void loop()
{
  /* If data is available from the Bluetooth module then pass it on to the
     hardware serial port. */
  if (BluetoothSerial.available())
    Serial.write(BluetoothSerial.read());
 
   /* If data is available from the hardware serial port then pass it on
      to the Bluetooth module. */
  if (Serial.available())
    BluetoothSerial.write(Serial.read());
}



Manual:

PLEASE NOTE that this manual covers several versions of module and is not just for the ones advertised in this thread. It includes some information and AT commands that are not relevant. For a list of AT commands see above list in this post.

Attachment:
HCARDU0004_JY_MCU_Bluetooth_Module_Manual.zip


You do not have the required permissions to view the files attached to this post.


Mon Aug 20, 2012 5:30 pm
Profile
Post Re: JY-MCU Bluetooth Serial Port Module (HCARDU0004)
Can this module be used as a master? I would like to be able to scan for other Bluetooth devices within range and initiate a connection from the Arduino. The code sample mentions that 'other settings' can be changed using standard AT commands, so I just wanted to check. Thanks


Thu Oct 25, 2012 11:35 am
Site Admin

Joined: Sun Aug 05, 2012 4:02 pm
Posts: 670
Post Re: JY-MCU Bluetooth Serial Port Module (HCARDU0004)
mitchyboy9 wrote:
Can this module be used as a master? I would like to be able to scan for other Bluetooth devices within range and initiate a connection from the Arduino. The code sample mentions that 'other settings' can be changed using standard AT commands, so I just wanted to check. Thanks


Hi, these are supplied factory set as slave devices. We have now attached the manual to the original post. Current shipped version is HC-06 (V1.05)


Thu Oct 25, 2012 7:16 pm
Profile

Joined: Thu Oct 25, 2012 8:01 pm
Posts: 1
Post Re: JY-MCU Bluetooth Serial Port Module (HCARDU0004)
Please note the defect in the example code.
This line:
Code:
NewSoftSerial BluetoothSerial(BT_SERIAL_RX_DIO, BT_SERIAL_RX_DIO); // RX, TX

should be:
Code:
NewSoftSerial BluetoothSerial(BT_SERIAL_RX_DIO, BT_SERIAL_TX_DIO); // RX, TX


Thu Oct 25, 2012 9:09 pm
Profile
Site Admin

Joined: Sun Aug 05, 2012 4:02 pm
Posts: 670
Post Re: JY-MCU Bluetooth Serial Port Module (HCARDU0004)
Well spotted, the code has now been updated.


Fri Oct 26, 2012 9:49 am
Profile

Joined: Fri Nov 23, 2012 9:23 pm
Posts: 3
Post Re: JY-MCU Bluetooth Serial Port Module (HCARDU0004)
Dear admin,
I’ve tried to download the zip file (manual) but I get the error that the file is corrupted so not able to unzip it. Could you please help? Thanks
Regards
cscaria


Fri Nov 23, 2012 10:13 pm
Profile
Site Admin

Joined: Sun Aug 05, 2012 4:02 pm
Posts: 670
Post Re: JY-MCU Bluetooth Serial Port Module (HCARDU0004)
Thanks for bringing this to our attention, the file should now work.


Sun Nov 25, 2012 8:12 pm
Profile

Joined: Fri Nov 23, 2012 9:23 pm
Posts: 3
Post Re: JY-MCU Bluetooth Serial Port Module (HCARDU0004)
admin wrote:
Thanks for bringing this to our attention, the file should now work.


thanks a lot. now it works!


Mon Nov 26, 2012 3:02 pm
Profile
Post Re: JY-MCU SLAVE Bluetooth Serial Port Module (HCARDU0004)
Hello,
What module should I have to connect to issue the AT command ?
USB to serial adapter?
something like this ?
[Link removed]
Thanks
Thierry


Wed May 22, 2013 11:10 am
Site Admin

Joined: Sun Aug 05, 2012 4:02 pm
Posts: 670
Post Re: JY-MCU SLAVE Bluetooth Serial Port Module (HCARDU0004)
Hi,

The following item (HCARDU0011) will work perfectly with this module: http://www.hobbycomponents.com/index.ph ... duct_id=91

Thanks,

Andrew


Thu May 23, 2013 3:21 pm
Profile
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