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P1-Meter-ESP8266

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

Installation instrucions

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 RJ11 P1 connetor

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

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Software for the ESP8266 that sends P1 smart meter data to DSMR reader (with CRC checking)

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  • C++ 93.0%
  • C 7.0%