A teardown of a new format of what I think is a common device. It is a 3-channel switch with BK7231N daughter card but installed at 90 degrees to the PCB (without a riser card). Loading of OpenBK was easy (even though it was my first time with this chipset) as I soldered headers to the daughter...

Thanks! Please post OBK JSON template (copy from the Web App) and Tuya Config, see tutorial: Futhermore, on that kind of devices, please remember to use PowerSave 1. They have bad quality power supplies.

Here is the link I used do have the backup of the original but how can I upload it?and here is the JSON templateCode: JSONLog in, to see the code

[BK7231N/CB2S] 3 channel relay switch module MINI-W1-3CH firmware change and teardown

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#1 20720727 04 Sep 2023 10:12

jnoam jnoam

Level 3

Post #1
20720727 04 Sep 2023 10:12

A teardown of a new format of what I think is a common device. It is a 3-channel switch with BK7231N daughter card but installed at 90 degrees to the PCB (without a riser card). Loading of OpenBK was easy (even though it was my first time with this chipset) as I soldered headers to the daughter card pads and that's it.

To reset, just touch the CEN pad on the edge with a GND cable. It worked on the first try on all 3 devices I converted.
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#2 20720877 04 Sep 2023 12:55

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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Post #2
20720877 04 Sep 2023 12:55

Thanks! Please post OBK JSON template (copy from the Web App) and Tuya Config, see tutorial:
https://www.youtube.com/watch?v=WunlqIMAdgw
Futhermore, on that kind of devices, please remember to use PowerSave 1. They have bad quality power supplies.

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.
#3 20723115 06 Sep 2023 11:21

jnoam jnoam

Level 3

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Post #3
20723115 06 Sep 2023 11:21

Here is the link I used
https://s.click.aliexpress.com/e/_EQ2uxgr
I do have the backup of the original but how can I upload it?
and here is the JSON template
Code: JSON
Log in, to see the code
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[BK7231N/CB2S] 3 channel relay switch module MINI-W1-3CH firmware change and teardown

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