P1 to MQTT

This small node.js application will read all values from the P1-port of a DSMR-based "Slimme meter" energymeter.

It reads all given values from the p1-reader library, and output them to mqtt topic split by object key.
Structure: Reading Structure

Enviroment variables

Variable	Usage	Required	Default
MQTT_SERVER_URL	Server URL of the MQTT server. The URL can be on the following protocols: 'mqtt', 'mqtts', 'tcp', 'tls', 'ws', 'wss'. (e.g. mqtt://127.0.0.1:1883)	Yes	mqtt://127.0.0.1:1883
MQTT_TOPIC_PREFIX	Defines the prefix used for mqtt topic naming. (e.g. p1/smartmeter)	No	rkvv_p1/smartmeter
P1_SERIAL_PORT	The serial port device to read the DSMR meesages from. (e.g. /dev/ttyUSB0)	Yes

MQTT Topic naming

The topics are named according to this schema: $(MQTT_PREFIX)/<equipmentId>/<objectKey>

Example Given this JSON:

{
    "meterType": "ISk5\2MT382-1000",
    "equipmentId": "4B384547303034303436333935353037",
    "electricity": {
        "received": {
            "tariff1": {
                "reading": 123456.789
            },
        },
    }
}

meterType becomes $(MQTT_PREFIX)/4B384547303034303436333935353037/meterType
electricity->received->tariff1->reading becomes $(MQTT_PREFIX)/4B384547303034303436333935353037/electricity/received/tariff1/reading