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by microtonal 714 days ago
Yeah, P1 has been around for a decade or so in the Netherlands. If don’t feel like setting up an MCU yourself, Homewizard Energy is pretty good. I don’t use their services, but you can enable a simple API on the local network that gives you a JSON representation of the ‘telegrams’ that come out of the P1 serial port.

https://www.homewizard.com/p1-meter/
2 comments
juahan 714 days ago
Oh yes, now I remember reading the P1 spec and it does indeed say that it has been in use in the Netherlands for many years already. In Finland we also call it the HAN-port or the H1-port. Also, I must clarify that it uses RJ12, not RJ26 which I don’t even think exists.
link
ragebol 714 days ago
The HomeWizard stuff is great. They also make a water meter, separate kWh meters in 1 or 3 phase and smart plugs.

If you have a subscription to their service, they can be programmed to eg turn on when there's excess solar power etc. And integrates with HomeAssistant.

link