AVATTO 4/5/6-Gang Wi-Fi Touch Switch: BK7231N Chipset, UART Flashing, Pin Configuration

AliExpress Link: https://www.aliexpress.com/item/1005001432382791.html


The switch is actually based on two separate (and identical) modules to support up to 6 gang.


Chipset is BK7231N, and can be flashed via UART without disconnecting and/or resoldering anything.
The logic board (containing the BK7231N) is connected to the relays board via an 8-pin socket (and some glue on the corners).
On the back side of the logic board, there are connection points for 3.3v, GND, TX & RX.


Pin configuration for each of the modules:

Pin	Type	Channel
6	Btn	1
7	Rel	1
8	LED	1
14	Rel	2
16	Btn	2
26	LED	2
28	WifiLED	-

Thanks! I haven't seen this kind of device yet. What a tricky way to do a double-switch... it must be a strange feeling having to pair it twice.