====== Gosund SP111 HLW8012 ======

HLW8012 is used to measure active power, voltage and current.

[[https://github.com/xoseperez/hlw8012]]

===== Current measurements =====

Maximum differential voltage measured on current shunt resistor is 43.75mV.
1mOhm resistor is enough to measure currents up to 30A.

===== Voltage measurements =====

Voltage is measured on V2P pin, which supports voltage range +-700mV. Datasheet recommends voltage divider of 5x470kOhm and 1kOhm. Scale factor is 2821 which convert 230V RMS into 82mV.