Pre Flashed ESPHome ESP32-C3 Power Monitoring Works with Home Assistant
 
The measurement error of active power about 0.2%
The measurement error of effective current is 0.5%
The measurement error of effective voltage is 0.5%
 
For Yaml, please visit: 
https://github.com/athom-tech/esp32-configs/blob/main/athom-mini-relay-v2.yaml
 
 
Specification:
 
Chipset: ESP32C3
Power: <=0.5W
Voltage range: AC 100-250V, (50/60Hz)
Max current: 10A
Transmission mode: Wi-Fi communication
Dimensions: (L)40*(W)40*(H)20mm
Color: White
Humidity: 5%-95%
Wireless Frequency: 2.4Ghz
Working Temp: ?20?-75

GPIOs
 
GPIO20:CSE7766 Rx
GPIO3:  Button
GPIO4:  Switch
GPIO6:  Relay
GPIO7:  LedLinki
 

Product Highlights
Power Monitoring Mini Relay Made Made For ESPHome is a relay control product made for ESPHome and Home Assistant. It is suitable for switch control, garage or appliance automation, and local smart home workflows.
Ideal For
Relay-based smart control
Inching or self-lock switch scenes
Local Home Assistant automation
Compatibility
Designed for local smart home use with Home Assistant. Products marked as Made For ESPHome use the correct Made For ESPHome compatibility wording and are intended for ESPHome-based local control.