Unknown Bluetooth Module with BK3231 chip


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. 

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  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?

Please help.


I didn't find the right solution from the Internet.

References: https://forum.allaboutcircuits.com/threads/unknown-bluetooth-module-with-bk3231-chip.123933/

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explainervideo6Dec 20,2017 18:16 PMAdd Comment


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