OpenTherm: Universal protocol for smart home heating systems

#1

Post by singingwolfboy » Sat, Jan 25, 2025, 8:11 PM UTC

OpenTherm: Universal protocol for smart home heating systems
opentherm.eu

Re: OpenTherm: Universal protocol for smart home heating systems

#2

Post by DamonHD » Sat, Jan 25, 2025, 8:16 PM UTC

"The original protocol is only available for members."

Not "open" IMHO.

Re: OpenTherm: Universal protocol for smart home heating systems

#3

Post by pandora-health » Sun, Jan 26, 2025, 8:18 AM UTC

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...

Re: OpenTherm: Universal protocol for smart home heating systems

#4

Post by cassianoleal » Sun, Jan 26, 2025, 11:46 AM UTC

pandora-health wrote: post #3

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?