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
Log in, to see the code
The YT video at: https://www.youtube.com/watch?v=pkcspey25V4 shows how to connect to HA via MQTT. !
Cool? Ranking DIY
