OpenHeating: Open Source Heating Control System

This is a diagram of the situation in my house; click on the symbols to get to the software components behind them. Don’t be upset if a link you click points to a placeholder page - I’m working on it :-)

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Why Yet Another Heating System?

Off the shelf heating control units are rather limited.

  • Configuration is rather lame in all cases. Heating control’s paradigm has always been “16 bit microcontroller and 7-segment displays” as it seems.

  • Cannot control an arbitrary number of heating circuits. Chances are that you have to buy a new (and more expensive) control unit when you decide to add one more circuit to the system.

  • Cannot coordinate multiple heat sources. For example, here in my house there is an old and dirty oil firing, and a newer wood stove in the living room. No way with any affordable control unit.

OpenHeating addresses all these limitations, especially the “multiple heat sources” limitation. It runs on Linux (my installation is a Raspberry), so yes there is internet and many possibilities.

Inner Beauty

  • Written in Python

  • Components loosely coupled in D-Bus

  • Components managed with systemd

  • GPIOs controlled not using the sysfs interface (which is deprecated), but rather with the newer gpiod.

  • Web done with flask.