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Comment on OpenTherm: Universal protocol for smart home heating systems

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The only open source implementation of OpenTherm (and EMS bus too now) that actually works (unlike commercial thermostats) and provides low load and weather compensation at the same time is:

https://github.com/Alexwijn/SAT

PID is used to smooth out weather compensation errors.

See my grafana for realtime boiler and cost data:

https://gasboiler.grafana.net/public-dashboards/8d44381aafa9...

Man, this is sweet! Do you know if there’s something similar but for Vaillant’s eBus?

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