The switch is very easy to open so i wont go into details, but remember, this device it's using high voltage, so make sure it's not connected to the mains.
Flashing-Uploading OpenBeken firmware
Used tuya-cloudcutter to flash OpenBK (had to setup in SmartLife/Tuya app - after first flash device did not connect to cloudcutterflash AP)
Followed this instructions tuya-cloudcutter INSTRUCTIONS.md and video Flash OTA using tuya-cloudcutter > By firmware version and name
> ~ Mini Smart Switch
> 1.2.1 - BK7231N / oem_bk7231n_control_switch
OpenBK7231N_UG_1.15.648.bin (CCtr flash)
Device could not connect to cloudcutterflash AP after reboot,
so I needed to create a "second" cloudcutterflash AP on spare Router with internet connection as stated in Note: of INSTRUCTIONS.md.
Had to disable WiFi on RPi - tuya-cloudcutter
After that it was possible to enter WiFi credentials thru Tuya app.
Turned off "second AP", enabled tuya-cloudcutter and the process of flashing OpenBeken continued.
! This smart switch connects power line N-out and S1 together that makes it unsafe for use other than with the classic wall switch !
I would like to thank everyone who enabled this to work
Elektroda and OpenBeken Team
and all of enthusiast who are posting and filming their work
Payed 3,63 € For UNSH Tuya 16A Tuya WiFi Smart Switch 2-way and 2,18 € form ESP-02S module witch I could not use.
~12 € is the price for Athom 3 Way Relay for ESPHome if buying 3 pieces with shipping
9~13€ Sonoff MiniR2 from local store
It was worth for the experience, tinkering, flashing, rebooting
Thank you for submitting the teardown.
As usually with this kind of the device, I would like you to enable the BK-specific power save function: PowerSave 1 in startup command (use backlog for multiple commands).
Otherwise you'll have to do that repair soon: