Software for the ESP2866 that sends P1 smart meter data to Domoticz (with CRC checking and OTA firmware updates)

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P1-Meter-ESP8266

Software for the ESP2866 that sends P1 smart meter data to Domoticz (with CRC checking and OTA firmware updates)

Make sure that your ESP8266 can be flashed from the Arduino environnment: https://github.com/esp8266/Arduino
Install the SoftSerial library from: https://github.com/plerup/espsoftwareserial
Place all files from this repository in a directory. Open the .ino file.
Adjust WIFI, Domoticz and debug settings at the top of the file
Compile and flash

You need to connect the smart meter with a RJ11 connector. This is the pinout to use

Connect GND->GND on ESP, RTS->3.3V on ESP and RxD->any digital pin on ESP. In this sketch I use D5