Which pins do I connect to flash a WB2S/BK7231T?
Connect TX1, RX1, GND, and a stable 3.3 V to VBAT. Leave other pins floating unless boot strapping is required [Elektroda, p.kaczmarek2, post #20222509]
Generic ODM tuya WB2S BK7231T power plug
TL;DR
- A generic ODM Tuya WB2S BK7231T power plug with power monitoring and a common AliExpress casing is being opened for a first Beken-module flashing attempt.
- The top appears plastic-welded, and a screw holds the PCB, making non-destructive disassembly difficult.
- A knife, ground impact, and light wiggling caused one leg to break off and the plastic screw mount to fail.
- The main open question is whether flashing needs only TX1 and RX1 or also a voltage supply.
https://www.aliexpress.com/item/4000478798085.html
This is I think most common casing and it was cheapest plug with power monitoring at the time.
I was trying to use zigbee plugs from allegro until now, kinda ok, but not really same level control as over esp ones, but esp based ones are pretty much thing of the past, maybe some from shelly and athom.
Zigbee ones from allegro are not really that great, as if I try to change the status indicator led not to shine when ON in ZHA cluster, it bricks the plug.
TOP of the plug seems to be plastic welded
then there is the screw in the pcb
... broken
another failure for me was that one leg broke off
So I still do not know how to disassemble these non destructively - top seems plastic welded, so I wen for it with the knife, then i hit the bottom part on the ground, but that resulted in the leg breaking off after light wiggling and also the plastic thing with the screw broke off.
Maybe somehow with hot air or maybe drill a hole where the screw in the pcb is.
From this https://github.com/openshwprojects/OpenBK7231T_App/wiki/BK7231T I do not understand if i just connecto to TX1 and RX1 or if I need to provide voltage somehow?
This is my first attempt on flashing tuya modules with beken chip.
Hope teardown is correct section to post this.
This is I think most common casing and it was cheapest plug with power monitoring at the time.
I was trying to use zigbee plugs from allegro until now, kinda ok, but not really same level control as over esp ones, but esp based ones are pretty much thing of the past, maybe some from shelly and athom.
Zigbee ones from allegro are not really that great, as if I try to change the status indicator led not to shine when ON in ZHA cluster, it bricks the plug.
TOP of the plug seems to be plastic welded
then there is the screw in the pcb
... broken
another failure for me was that one leg broke off
So I still do not know how to disassemble these non destructively - top seems plastic welded, so I wen for it with the knife, then i hit the bottom part on the ground, but that resulted in the leg breaking off after light wiggling and also the plastic thing with the screw broke off.
Maybe somehow with hot air or maybe drill a hole where the screw in the pcb is.
From this https://github.com/openshwprojects/OpenBK7231T_App/wiki/BK7231T I do not understand if i just connecto to TX1 and RX1 or if I need to provide voltage somehow?
This is my first attempt on flashing tuya modules with beken chip.
Hope teardown is correct section to post this.
Comments
Obviously you also need to connect 3.3V power and GND. I will update readme to directly state it. Remember to use USB to UART converter in 3.3V mode (3.3V logic levels). Please do a full 2MB (enter... [Read more]
It was just the "BAT" part on VBAT was confusing me, after reading https://developer.tuya.com/en/docs/iot/wb2s-module-datasheet?id=K9ghecl7kc479 it is clear _VBAT | P | Power supply pin (3.3 V), which... [Read more]
You can also use onboard LDO regulator (AMS1117 3.3 etc) and connect 5V to the input of LDO to get 3.3V at the output of LDO. Still, 3.3V logic levels on UART are a must. It can indeed be the same device... [Read more]