[BK7231T - WB3S] POWRUI Smart Power Strip with 4-Outlet Extender (Outdoor Smart Plug)
Sorry I didn't take many pictures. Amazon started to ship this with a WB3S when it used to have an ESP chip, so I found this forum. Thanks for all the hard work.
I was able to flash by first erasing using Windows, then using my Mac to write the firmware. I followed the instructions here: https://github.com/openshwprojects/OpenBK7231T_App
This top view of the chip was useful to determine which pins needed soldering: https://obrazki.elektroda.pl/4208721600_1628153867.png
At first I tried while it was mains powered (dangerous) but it didn't work, so I used my USB-TTL adapter at 3.3V. My poorly-soldered GND, 3.3V, and TXD, and RXD points were enough to get flashing working.
Image of chip
PIN assignments
Pin 6 - Relay 4
Pin 8 - Led_N - Power LED
Pin 9 - Relay 1
Pin 24 - Relay 3
Pin 26 - Relay 2
Those numbers assume left to right if you are looking at the front of the device.
I haven't yet been able to figure out how to get the button to work, but that was less important to me than using a 3rd party, open-source firmware. Hope this helps someone, and any ideas on the button would be appreciated.
Product Link: https://www.amazon.com/dp/B07KK62GB7
I was able to flash by first erasing using Windows, then using my Mac to write the firmware. I followed the instructions here: https://github.com/openshwprojects/OpenBK7231T_App
This top view of the chip was useful to determine which pins needed soldering: https://obrazki.elektroda.pl/4208721600_1628153867.png
At first I tried while it was mains powered (dangerous) but it didn't work, so I used my USB-TTL adapter at 3.3V. My poorly-soldered GND, 3.3V, and TXD, and RXD points were enough to get flashing working.
Image of chip
PIN assignments
Pin 6 - Relay 4
Pin 8 - Led_N - Power LED
Pin 9 - Relay 1
Pin 24 - Relay 3
Pin 26 - Relay 2
Those numbers assume left to right if you are looking at the front of the device.
I haven't yet been able to figure out how to get the button to work, but that was less important to me than using a 3rd party, open-source firmware. Hope this helps someone, and any ideas on the button would be appreciated.
Product Link: https://www.amazon.com/dp/B07KK62GB7
Comments
Thanks for the teardown, we will add it to templates database. Regarding button, I can write a script for you later, but if you want just a simple behaviour "toggle All" then you could use Btn_Tgl_All: ... [Read more]
I ended up getting another one of these, and managed to irreparably damage the RX trace on the WB3S chip. Luckily I found https://github.com/tuya-cloudcutter/tuya-cloudcutter which worked great for... [Read more]
Just wanted to add one more detail that the button is indeed PIN 14. Here's the full config for anyone who needs it. { "vendor": "POWRUI", "bDetailed":... [Read more]
Why do you have so strange channel indexes? I have submitted the template: https://github.com/OpenBekenIOT/webapp/commit/5f8934156185a7f8a2ceec13efea004fc2bd65a0 [Read more]
Yeah that was a mistake - fixed in a subsequent edit. Thanks! [Read more]