TEARDOWN [BL602] ZENGGE Magic Home Pro RGBW 12-24v 3+3 pin SMART LED Strip Controller

Hello everyone. I leave you the teardown of the ZENGEE intelligent LED controller.

It uses the BL602 chip, A612 for the microphone input for music effects I guess and the integrated 74HC245 which is a one-wire driver IC, able to control up to 2048 pixel. It supports WIFI+BLE and has a 24-button RF remote control.



I was able to install OpenBeken using the mhflasher app and it worked flawlessly. Then I updated by OTA to the latest version. At the moment I could not find a way to make it work with my WS2811 PIXEL LED. I will make measurements on the BL602 output pins and identify which one connects to the driver and how to use it. I am new to OpenBeken but I will let you know of any progress I make. If you have any questions feel free to ask and I will help you any way I can.



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EDIT: PAD 21 GPIO12 is connected to 74HC245
PAD 22GPIO14 is connected to A612

Made some test, but still the same. The bad side is that I didn't make a backup. Now I can't rollback to the original firmware..

That's interesting, this is the first time ever I see a per-pixel LEDs with BL602! I didn't even know this variant existed.

Well, I guess we need to add a driver for that. We have per-pixel LEDs with BK7231, but not with BL602.

maybe we should start with checking the SDK:
https://github.com/search?q=repo%3Aopenshwprojects%2FOpenBL602%20ws2812&type=code

It seems there is actually a ready mechanism for it:


Added after 2 [hours]:

@divadiow do you have BL602 to help testing, maybe>?

p.kaczmarek2 wrote:

do you have BL602 to help testing, maybe>?

yes sure

We can use my device to test anything you want. I will gladly help. Let me know if you need another measurements from the board. If something fails I have a serial flasher and soldering skills. Also an air soldering station.

Sorry for my poor English.

Greetings from Argentina.

Hello again greetings from Argentina.

I've been working abroad for a while and didn't have a chance to do anything until today. Had some problems with the LFS partition so I couldn't create files and save them with the LittleFS. Solved it by flashing via UART the non OTA version.
Now that everything is working I'm trying to compile the PixelAnim driver but it's a bit beyond my knowledge. I also wanted to ask a question. The device comes with a RF control, not IR. Can it be used with OBK?

PS: I don't know why but after the update, the first led stays on at startup with blue light. It is a lamp made in 3D printing with WS2811 led strip on it.

Wait, are you saying that you managed to get WS2812B (and similiar) working on BL602 platform? Did you integrate the BL602-SDK WS2812B driver (spi_output_wave)? Can you share your code? I am willing to help but it would be nice to have some starting point!

Nono, not at all. Will try, but as I said, After a full reset, at first the led nº1 was white. after another full reset was blue. Anyway. still looking info about it. I'm willing to help as much as I can.

Now I'm looking at this article. Might be useful.


PineCone BL602 talks SPI too!
https://lupyuen.github.io/articles/spi

This is a very interesting article, but we don't even need that. We just need to try setting up and calling a dedicated function spi_output_wave. We may also need to adjust the timings, but I hope that it won't be necessary.

from identical device. boot out:



and factory dump attached. mine has LF686C20

and perhaps P5 is connected for SPI





OBK first boot

Hi! I tried my best to compile the driver but it is too advanced for me. If I am not mistaken LF686C20 is the same chip as BL602 right? The dump should work without problems. My device is totally available for any test you want to do.

Regards

gerardoavelini wrote:

If I am not mistaken LF686C20 is the same chip as BL602 right

correct. A Leapfive BL602 - https://www.leapfive.com/wp-content/uploads/2020/09/LF686-Datasheet.pdf