ESP32 project to read power usage from a digital power meter via the infrared interface. This was developed for a Landis+Gyr E350 power meter, but might work with similar power meters.
Hardware is just a ESP32 with an IR receiver hooked up to pin 16 (with a pullup resistor) and an IR LED hooked up to pin 17 of the ESP32.
Data is transferred via an MQTT broker. The node script under server_influxdb takes the received data, converts it into usable form and writes it to an InfluxDB database.