Firmware for ESP8266 to communicate with three PZEM-004T power meter module and report on MQTT.
Features:
- Runs on ESP8266
- Measures three phase
- Reports over MQTT
- OTA
- WiFi
PZEM-004T doceumentation: https://github.com/olehs/PZEM004T
Inspiration: https://gist.github.com/bfritscher/da9dac542d4d70604b607670c867d555