BK8000L Bluetooth Audio Module: Incorrect Button Functions - VOL+, VOL-, NEXT, PREV, PP/CALL, MUTE

Question

Hello, I just started testing the BK8000L system. Pairing, turning on music etc. works beautifully. The problem is when I want to use the possibilities of dedicated pins for buttons. These are the places marked in red: I checked 100 times if I was wrong, but unfortunately it still came out that...

krzbor · Answer

I don't know this module, but Chinese ones are sometimes made differently. See: link there are two red connection pictures. One is PREV / VOL- and NEXT / VOL +. The BK8000L you mentioned is a chip, but the module can be made differently.

matti0010 · Answer

The latter of PREV / VOL- and NEXT / VOL + applies to BK8200, but in fact Chinese systems can be weirdly made. Only now, when I was pushing everything down, it did nothing (I thought that I would burn the module at most). Nevertheless, it would agree with what I have (VOL exchanged with NEXT and PREV). Only how to get there, because I care about VOL the most

Anyone got any idea?

krzbor · Answer

Check the chip catalog list and whether the corresponding feet of the integrated circuit are connected to the appropriate pins of the module. I'm worried about the ambiguous descriptions on the integrated circuit pins. Some functions are described on GPIOx outputs, and you are also interested in different ways. This may mean that the operation of the pins depends on the software loaded into the chip

matti0010 · Answer

Yes, this is the second problem I forgot to mention. Catalog information ... has anyone seen, anyone knows? For 2 days searching the internet for datasheets but to no avail ... Maybe I'm unlucky, maybe not. The only meaningful information I found is on the page I gave in the first post. This layout is really interesting and cool, it is worth to be interested in it. However, access to it in Poland and the catalog note strongly deter ...

I even wonder if he would write to the producer, maybe he has a catalog note ...

ukixx · Answer

So yes, I just got the same module and it's just as you write, with the difference that the buttons have double functions and as long as you hold the button then it works differently. VOL + - works briefly like NEXT, long as VOL- VOL- - works shortly like PREV, long as VOL + NEXT - works like PAUSE / PLAY briefly, long - disconnects BT

matti0010 · Answer

In a while I should get another module from China, I will see if it has other functionalities ... because I slowly feel that everyone works as they want (with these buttons). Just out of curiosity, you bought because you read this topic or did you (or accidentally) have seen it before?

ukixx · Answer

Even if you quickly click NEXT twice, it calls back the last number, during the conversation NEXT ends the call and returns to playing music, the call is also answered.

A friend bought these modules some time ago and I took about a month to start. I'm going to use this to connect the car radio to the phone. The supply voltage must be higher than 3.3V so that there is no low battery alarm. Maybe we will try with RS232 communication. The only thing that works is RESET, only LED0 (PIN 13) works.

matti0010 · Answer

Interestingly, I didn't think about checking these modules. I see that they have much more potential than they wrote on the site. Do you have the opportunity to check if ATa commands are working?

ukixx · Answer

Since the pinout is a kaleidoscope, I wonder if Rx and Tx will be in places. For now my friend at home is also fighting this module, he has FTDI ready so maybe something will go well, although it is a hard matter because there is nowhere description for this version. Also, do not directly bridge RN and LN outputs to connect headphones, I bridged through 10? resistors and plays, even loudly The headphones have 32?.

matti0010 · Answer

If you bridged without a resistor, it didn't play or bits something?

Don't tell me your friend has another pinout

I wrote to the "manufacturer" of the system regarding the catalog note, maybe she could explain something, but for a month silence ...

ukixx · Answer

It didn't move without resistors. You can see the outputs do not start in parallel and it was short-circuiting, now it plays nicely. Rather, it has the same pinout, the modules were in one package, but you can see several versions and the description only for BK8000L.

matti0010 · Answer

Strange, it worked without a resistor. Only at the same time I connected only one amplifier (RN and LN I have a rigidly short tin droplet). PAM8403 burned me, but I do not know why, it is possible that through the speaker because then it turned out that it was damaged ...

ukixx · Answer

Not only this module pulls about 50mA during operation, and how the communication is 100mA and it does not matter whether it plays loud or quiet, and according to the description should pull 26mA.

matti0010 · Answer

A miracle that works The very fact that such a module for 7 PLN does all the work for us with Bluetooth support for audio is already a lot.

uboot571 · Answer

Hello, I am going to use such a module as recognition of the owner (and playing music from the phone). The question is, after pairing with the phone and disconnecting the power supply (or loss of Bluetooth connection), the module broadcasts to other phones or holds the settings for reconnection only with the owner's phone?

reaven22 · Answer

The module broadcasts to other phones,

uboot571 · Answer

On this page I found a fairly detailed description of this module http://www.electrodragon.com/w/BK8000L " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://www.electrodragon.com/w/BK8000L
Theoretically, you could send the following command to the module:

Quote:
AT + CC last paired device to connect

which probably returns the MAC address of the paired device and compare it with the MAC address of the owner's phone saved in the microcontroller.
Someone can check this command?

elektryk95 · Answer

Hey.
I need help with this module. I connected it according to what is written in the catalog note. However, after switching on, only one LED1 (red) lights up and that is all. I'm trying to pair with the module by holding the CALL button - unfortunately it is invisible. Has anyone met something like that?

Greetings,
Piotr

BK8000L Bluetooth Audio Module: Incorrect Button Functions - VOL+, VOL-, NEXT, PREV, PP/CALL, MUTE

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