What hardware is inside the Schneider Wiser 550B6000 smart plug?
It uses a BK7231N-based CB3S Wi-Fi module, a BL0942 10-pin power-meter chip, a single relay, and a status LED [Elektroda, snusken, post #20937705]
[BK7231N/CB3S] Schneider Wiser smart socket - teardown, CB3S, BL0942
TL;DR
- A Schneider Wiser smart socket 550B6000 for Danish mains plugs was opened and traced to its CB3S Wi-Fi module and BL0942 power-meter chip.
- Wire tracking identified RX, TX, CF1, button, LED, and relay pins on the CB3S, making the board easier to reflash and automate.
- The CB3S pin config was P11 RX, P10 TX, P9 button active low, P7 BL0942 CF1, P24 LED active high, and P26 relay active high.
- OpenBK7231N_QIO_1.17.437.bin flashed successfully over a USB-3.3V_UART converter, and the flasher recovered Tuya parameters from the original firmware.
- The device worked through the OpenBK web interface, and MQTT to Home Assistant was demonstrated in a linked YouTube video.
Generated by the language model.
Bought a Schneider smart plug 550B6000 for Danish mains plugs:
With a hobby knife and a small flat screwdriver, it is possible to open and separate the bottom and top parts. GND and 3.3V are easily recognized:
On the PCB, there is a 10-pin power meter chip. It seemed to be a BL0942. On the CB3S module, RX and TX pins are found:
A bit more wire tracking reveals the pins for the BL0942 RX, TX, and CF1:
CB3S pin config.:
P11 - RX
P10 - TX
P9 - Button active low
P7 - BL0942 CF1
P24 - LED active high
P26 - Relay active high
Using a USB-3.3V_UART converter, I flashed the OpenBK7231N_QIO_1.17.437.bin firmware.
In this case, the flash program could retrieve the Tuya parameters from the original firmware.
With the OpenBK firmware, it worked nicely when browsing to the IP address and setting up the parameters.
The YT video at: https://www.youtube.com/watch?v=pkcspey25V4 shows how to connect to HA via MQTT. !
With a hobby knife and a small flat screwdriver, it is possible to open and separate the bottom and top parts. GND and 3.3V are easily recognized:
On the PCB, there is a 10-pin power meter chip. It seemed to be a BL0942. On the CB3S module, RX and TX pins are found:
A bit more wire tracking reveals the pins for the BL0942 RX, TX, and CF1:
CB3S pin config.:
P11 - RX
P10 - TX
P9 - Button active low
P7 - BL0942 CF1
P24 - LED active high
P26 - Relay active high
Using a USB-3.3V_UART converter, I flashed the OpenBK7231N_QIO_1.17.437.bin firmware.
In this case, the flash program could retrieve the Tuya parameters from the original firmware.
With the OpenBK firmware, it worked nicely when browsing to the IP address and setting up the parameters.
Code: JSON
The YT video at: https://www.youtube.com/watch?v=pkcspey25V4 shows how to connect to HA via MQTT. !
Comments
Thanks, but can you also include JSON template from the Web App, so I can copy-paste it to our devices list? https://openbekeniot.github.io/webapp/devicesList.html Added after 4 [hours] 22 [minutes]:... [Read more]