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Pre Flashed Tasmota 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%
 
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