Tuya TCOGCZ20 LN882H Smart Socket EU Plug BL0937 power monitor pinout

I recently purchased a TNCE Tuya Wifi Smart Socket (Model: TCOGCZ20).
I have successfully flashed it with OpenBeken and figured out the correct pin mapping for power monitoring, which was a bit tricky due to the LN882H pin grouping.

Hardware Details

Device: TNCE Tuya Wifi Smart Socket EU Plug 16/20A
Model: TCOGCZ20
Main Chip: LN882H
Power Monitoring Chip: BL0937










Flashing Procedure

The device has accessible pads on the bottom of the PCB. I used the BK7231 GUI Flash Tool (which supports LN882H).
Wiring Map for Flashing:

3V3 => 3V3
TX0 (A2) => RX (of your USB-TTL adapter)
RX0 (A3) => TX (of your USB-TTL adapter)
GND => GND
A9 => GND (Bridge to GND during boot to enter flash mode)

Working Pin Configuration

P5: LED (Channel 1)
P6: Btn (Channel 1)
P7: Rel (Channel 1)
P11 (B3): BL0937CF
P12 (B4): BL0937SEL
P20 (A12): BL0937CF1

Configuration Template

I have same board, but not showing voltage with this config.

>>21903306

Yeah, you are right, there was a typo in the config.

Just to double-check, these are my pin settings:

Thanks, now working, maybe someone have calibration setting for BL0937?

>>21904145

Unfortunately, no.

You can go to Launch Web Application => Tools => Power Metering and use the guide to calibrate your plug.

I have a power monitoring plug with a display and used a hair dryer as a load to calibrate the plug.