I built p1meter.dev, a small Phoenix LiveView project that simulates a Dutch/Belgian smart meter P1 port.
It streams live DSMR 5.0 telegrams over raw TCP, so you can test P1 readers, parsers, dashboards, or home energy integrations without needing a physical smart meter, P1 cable, adapter, or test setup nearby.
You can try the stream with:
nc p1meter.dev 8080
The web UI shows a live preview of the simulated meter values, while the TCP endpoint emits telegrams similar to what a real P1 reader would receive.
The project is intentionally small. I mainly built it because I wanted predictable DSMR/P1 test data while working on P1-related tooling.
It may be useful for:
- testing DSMR/P1 parsers
- developing home energy dashboards
- experimenting with TCP-based P1 readers
- reproducing parser/integration bugs
The telegrams are generated using my Elixir dsmr package, which handles the DSMR telegram data structures and formatting.
Things I’m considering next:
- more realistic daily usage patterns
- configurable meter profiles/scenarios
- more edge cases in telegram data
- examples for consuming the stream from Elixir and other ecosystems
Feedback, bug reports, and ideas are very welcome.
You can also peek at the source at https://github.com/mijnverbruik/p1meter.dev.
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