Bluetooth module HC-06

balou · Joined: 14 Apr 2007 Posts: 36

Hello,

Is it possible to change the name and password with a "Bluetooth module HC-06" with a Bascom AVR program ?
Balou.

(BASCOM-AVR version : 2.0.8.2 )

albertsm · Joined: 09 Apr 2004 Posts: 5920 Location: Holland

sure. use the AT+NAME command of the BT module.
And to change the pwd use AT+PIN. It is explained in the HC-06 datasheet.

In bascom use PRINT to send data. And use either INPUT or INKEY/WAITKEY to fetch data from the module.

you did connect the module TX/RX to the AVR processor right?

balou · Joined: 14 Apr 2007 Posts: 36

Hello Mark,

I have read the datasheet.
The BL module is connected to an Atmega328P board, TR-RX, RX-TX.
My question is how I can change the password without using a Terminal program.
I want to use an AT command with a Bascom program.

Balou.

albertsm · Joined: 09 Apr 2004 Posts: 5920 Location: Holland

I do not see what the problem is. you also do not mention what you have tried.
but you connected the AVR to the HC06. so that should be ok.

my suggestion would be :
- first connect the HC to a PC and terminal so you can play with all AT commands. this way you can test the baud rate too.
but lets assume you did so.
- the AVR can simply send data using PRINT : PRINT "AT+PIN1234"
That will set the PWD to 1234
The default baud is 19200 so the AVR should have CONFIG COM=19200, .... as well

you can always mention what you tried, what HW you use and what it is you want to accomplish.

EDC · Joined: 26 Mar 2014 Posts: 971

Some modules must be powercycled with KEY pin to entering into the AT Commands so hardware for changing name or PIN "In the fly" must be some more complicated.

balou · Joined: 14 Apr 2007 Posts: 36

I want to use this program to change the password.
BL is in Program mode, LED blinks every 2 seconds.
Password has not changed.
What am I doing wrong?

Balou.

'**** Pin change BL HC-05 **

$regfile = "m328pdef.dat"
$crystal = 8000000
$hwstack = 150
$swstack = 150
$framesize = 150

Config Com1 = 9600 , Synchrone = 0 , Parity = None , Stopbits = 1 , Databits = 8 , Clockpol = 0
Config Serialin = Buffered , Size = 254
Config Serialout = Buffered , Size = 254

'** HC-05 ** Pin changed ***

waitms 500

Print"AT+PIN0000"

waitms 500

End

EDC · Joined: 26 Mar 2014 Posts: 971

If you use Serialin or Serialout that means that Serial is buffered and receiving and sending will be processed in the background and also, this is important, with Interrupts.

So you must Enable Interrupts for Serialin or Serialout Very Happy

If you comment/remark line "Config Serialout ..." code should work too Very Happy

balou · Joined: 14 Apr 2007 Posts: 36

Still not working, different boudrates tested.
Also tried with the HC-06.

'**** Pin change BL HC-05 **

$regfile = "m328pdef.dat"
$crystal = 8000000
$hwstack = 150
$swstack = 150
$framesize = 150

Config Com1 = 38400 , Synchrone = 0 , Parity = None , Stopbits = 1 , Databits = 8 , Clockpol = 0
Enable Interrupts '** Bluetooth **

'** HC-05 ** Pin changed ***

waitms 500
Print"AT+PIN0000"
waitms 500

End

six1 · Joined: 27 Feb 2009 Posts: 553

$baud=9600

'Change name of HC06
' for changing, uncomment two print lines.
' press button on HC06 modul and hold, while starting ATMega. After 3 Seconds, relase button; done...
'Print "AT+NAME=New Name"
'Print "AT+PSWD=0000"

balou · Joined: 14 Apr 2007 Posts: 36

This should be it?
Still not working.

'** HC-05 ** Pin changed ***

print
print

Print"AT+PIN0000"

albertsm · Joined: 09 Apr 2004 Posts: 5920 Location: Holland

when something does not work you need to start at the begin.
So very first thing you need to check is the module : does it even work?
So connect it to a PC using a virtual COM port like a FT232. Or use a MAX232 and connect to a real COM port.
Then run the bascom terminal emulator, or any other terminal emulator. ANd select the COM port.
Also set the BAUD. usually it is best to start at 9600.
Then try 19200, etc.

the type AT followed by a RETURN and you should get data back like OK
Then you know the module is ok and you know the baud.

you can also test setting the PWD and or name then.
So make sure it works using a terminal before you perform the same using a micro.

Evert :-) · Joined: 18 Feb 2005 Posts: 2156

Keep in mind that the Bluetooth module HC-06 runs on 3.3V
Don't know where your AVR is running on, but level shifting for the TX line is preferable. RX doesn't matter, the AVR will not have a problem with that everything above 2V will be seen as logic 1.

If you have the module on a caring board with voltage regulator etc. it should work fine on 5V.

balou · Joined: 14 Apr 2007 Posts: 36

Thank you for the response.
I know that the HC-06 works at 3.3V.
I use an level shifting for the TX line

altron · Joined: 10 Mar 2008 Posts: 10

Are you putting in the "=" sign?

As others have stated already?

Print "AT+PSWD=0000"

not

Print "AT+PSWD0000"

snow · Posted: Tue Mar 24, 2020 4:53 am Post subject:

When programming the HC-05 from scratch with power cycle button.You must use baud rate 38400 to accept AT commands.
I use these for a product i make and program the HC-05 before mounting