Unknown Bluetooth Module with BK3231 chip

Discussion in 'Wireless & RF Design' started by DuzMontana, May 9, 2016.

  1. DuzMontana

    Thread Starter New Member

    Mar 25, 2015
    24
    2
    Do you know this guy?

    IMG_20160509_083858.jpg IMG_20160509_083844.jpg

    I got these hoping that they were HC-05 replacement (as mentioned in the product description from the buyer), but I can't get them to work the same way. They won't respond to UART commands.

    Actually they don't even broadcast their presence and thus I started to think the pin order might be different on that version, so I though I'd check the pinout for the chip and verify. Where this gets bad is that I can't even find a datasheet that matches the chip.

    The chip is 32 pin on there and the only datasheet I find for BK3231 is a 56-pin QFN chip (http://www.bekencorp.com/en/Botong.Asp?Parent_id=2&Class_id=8&Id=85)

    Contacting the vendor, he tells me that he can't find the datasheet either... LOL WTF! Is this just a scam?

    In any case, I kept searching google image and found a single post from swe-dude (https://forum.arduino.cc/index.php?topic=348546.0) that seemed to have the module to work, so, now, I don't know if that's just a scam or if I should try to put some time in getting that to work.

    Does any of you got that thing to work, not sure where to start with that...

    what do you think?
     
    Last edited: May 9, 2016
    artyomfm likes this.
  2. DuzMontana

    Thread Starter New Member

    Mar 25, 2015
    24
    2
    Finally found a datasheet here. Seems that Beken will do QFN 32 and 40 format on demand with less I/O pins.

    upload_2016-5-9_15-54-27.png

    From that I could get the following pinout which seems to be consistent with HC-05 pinout. BK3231module.jpg

    Still have to get the AT commands to work...

    Anybody with experience programming these modules?
     
    artyomfm likes this.
  3. miro_mik

    New Member

    May 19, 2016
    2
    0
    Hi, I have the same module... to go to AT mode:

    - you can not have open connection (connected via BT)
    - just send AT+VERSION to see if the module is OK
    - send as ASCII /r/n (if I turn off /r/n it doesn't work in AT)

    [​IMG]
     
    Last edited: May 19, 2016
  4. miro_mik

    New Member

    May 19, 2016
    2
    0
    One more thing:

    - Past copy the commands to the console... If you press backspace it takes is as character and mess up the message so it will not work...

    AT+NAMExxx
    AT+BAUD4
    AT+BAUD8
    AT+VERSION
    AT
    AT+PIN1234
     
  5. mexxle

    New Member

    Oct 23, 2016
    1
    0
    AT+HELP reveals the complete list of available commands:

    Code (Text):
    1. Command              Description
    2.  
    3. ----------------------------------------------------------------
    4.  
    5. AT                   Check if the command terminal work normally
    6.  
    7. AT+RESET             Software reboot
    8.  
    9. AT+VERSION           Get firmware, bluetooth, HCI and LMP version
    10.  
    11. AT+HELP              List all the commands
    12.  
    13. AT+NAME              Get/Set local device name
    14.  
    15. AT+PIN               Get/Set pin code for pairing
    16.  
    17. AT+BAUD              Get/Set baud rate
    18.  
    19. AT+CLEAR             Remove the remembered remote address
    20.  
    21. AT+LADDR             Get local bluetooth address
    22.  
    23. AT+DEFAULT           Restore factory default
    24.  
    25. AT+COD               Get/Set local class of device
    26.  
    27. AT+IAC               Get/Set inquiry access code
    28.  
    29. AT+ROLE              Get/Set master or slave mode
    30.  
    31. AT+STATE             Get current state
    32.  
    33. AT+UARTMODE          Get/Set uart stop bits and parity
    34.  
    35. AT+ENABLEIND         Enable/Disable Indication print
    36.  
    37. AT+LSP               List Paired Device List
    38.  
    39. AT+RESETPDL          Reset Paired Device List
    40.  
    41. AT+REMOVEPDL         Remove one entry from Paired Device List
    42.  
    43. -----------------------------------------------------------------
    44.  
    45. Note: (M) = The command support master mode only, other commands
    46.  
    47. support both master and slave mode.
    48.  
    49. For more information, please visit http://www.bolutek.cn
    50.  
    51. Copyright@2012 www.bolutek.cn. All rights reserved.
    52.  
     
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