P1-Meter-ESP8266

Software for the ESP2866 that sends P1 smart meter data to a MQTT topic.

Installation instrucions

• 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, MQTT and debug settings at the top of the file
• Compile and flash

Connection of the P1 meter to the ESP8266

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.

I changed the code to work with the older DSMR 2.2 version telegrams. That means the crc checks are removed.