Flashing Emax 8774 Socket with BK7231N Chip Using OpenBeken Firmware

Hello
I would like to add my "teardown" or more like the setup of some different version of Emax 8774 energy monitoring socket, This socket is sold at least in Finland and it is called EmaxSmart Home by TUYA (product code 8774) and this one uses BK7231N chip instead of the BK7321T which is in the readymade configurations.


Here are a few photos of the socket:



When flashing the firmware with tuya-cloudcutter I selected the "device with firmware version and name" and chose option "1.1.8 BK7231N / oem_bk7231n_plug" as I confirmed this plug was version 1.1.8 by tuya smart app. Next I selected custom firmware file "OpenBeken-V1.17.697_bk7231n.ug.bin" and got the socket in pairing mode the same way as the Emax 8774 with BK7231T version of the socket, by long pressing the power button until the blue light was blinking fast and after giving the button again a long press until the light started to blink slowly.

I will not do the full teardown unless someone really needs it as I managed to make this socket work with tuya-cloudcutter and openbeken and tinkering with the configuration until I got it to work, it had totally different pin setup as the BK7321T version and pins are as follows:

Btn = 6
Led_n = 7
Relay = 8
BT0937SEL = 10
BT0937CF = 24
BT0937CF1 = 26

Here is the configuration:
EmaxSmart8....26.46.txt Download (560 bytes)


Hope this helps anyone who had issues with this same version of socket.

Tero