[BK7231N / CBU] MOES WiFi 4 Gang Switch MS-104D

https://it.aliexpress.com/item/10050026683680...t_main.11.17723696296tao&gatewayAdapt=glo2ita

MOES WiFi 4 Gang Switch MS-104D

Chip: Tuya CBU (BK7231N) https://developer.tuya.com/en/docs/iot/cbu-module-datasheet?id=Ka07pykl5dk4u

Photos:


Teardown:


Flash with https://github.com/openshwprojects/OpenBK7231T_App

(WARNING: this view refers to the BOTTOM of the chip!!!)


I used the new BK7231GUIFlashTool (https://github.com/openshwprojects/BK7231GUIFlashTool) but be aware that I had to use the "write (no backup)" function because flash read always failed (probably because bad connetions with the USB-serial chip or bad USB-serial chip itself). Do that at your own risk.

This is the PIN layout (where S is the input switch and R is the output relay):


Everything work smoothly except for a bad WIFI reception but I think this is a limitation of the CBU chip itself.

Bye!