HomeKit Firmware for gosund UP111 power monitoring samrt plug.
The power, current and voltage values can be seen by using the Eve app.
To calibrate, plug in a know load, for example a 60 watt lightbuld, set the calibrate volts and calibrate watts values to your load, then hit the calibrate pow button. The calibrated values will be saved and used after each reboot.
see the wiki :- https://github.com/maccoylton/esp-homekit-gosund-up111/wiki