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prometheus p1 exporter

The prometheus p1 exporter is a simple (by design and purpose) binary that can read data from a smart meter through a serial port and expose these metrics to be scraped by prometheus.

configuration

The only things that can be configured with an environment var is:

  • SERIAL_DEVICE: the device that needs to be read (usually something like /dev/ttyUSB0)

limitations

Lines are processed as they come in, no checksums are handled.

For now, only a few fields are exported:

  • power used in tariff 1 in Wh
  • power used in tariff 2 in Wh
  • current power draw in W
  • gas used in cm2, updated hourly

These values come from the following oids:

  • 1-0:1.8.1 (meter reading, tariff 1 in kWh)
  • 1-0:2.8.2 (meter reading, tariff 2 in kWh)
  • 1-0:1.7.0 (Actual power delivered in kW)
  • 0-1:24.2.1 (gas meter reading, includes timestamp of reading)

sources and acknowledgements

This repo for providing me with a direction: https://github.com/marceldegraaf/smartmeter
This document for providing me with a overview of how p1 works: http://files.domoticaforum.eu/uploads/Smartmetering/DSMR%20v4.0%20final%20P1.pdf
This page (Dutch) for a quick overview of how to use cu to get an example reading: https://infi.nl/nieuws/hobbyproject-slimme-meterkast-met-raspberry-pi/