this post was submitted on 02 May 2024
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[–] [email protected] 12 points 6 months ago* (last edited 6 months ago) (16 children)

That's why one uses an industry standard that is brand-independent,operates offline by design and does not require a central component besides a power supply.

Sounds like utopia?

This standard has been available since 1990 in its archaic form, since 2002 in its current form. It is downwards compatible and over 400 companies worldwide are part of the standard. HomeAssistant, ioBroker, openHAB,etc. all support it directly and there are multiple crossover gateways with other standards like DMX, ModBus, Dali,etc. exist. And no, it's components are not more expensive once you look at the TCO.

For fucks sake, people, use KNX.

(PS: There are even a few open-source/DIY components available)

[–] [email protected] 2 points 6 months ago (3 children)

For fucks sake, people, use KNX.

I thought you'd say OpenTherm!

[–] [email protected] 2 points 6 months ago (1 children)

Haha, no. But I know someone who was part of the OpenTherm development.

To quote him:

OpenTherm exists because Plumbers don't trust Sparkys and Sparkys don't trust plumbers.

OpenTherm is easy to install but "stupid" as hell and not adaptable to modern needs mostly, especially if you consider modern heating concepts like passively heated houses, heat pumps,etc.

That's different from KNX (or Modbus in that regard) - They are much broader in their appeal. Singule use/walled garden systems are always a bad idea,imho.

[–] [email protected] 1 points 6 months ago (1 children)

OpenTherm is easy to install but "stupid" as hell

Ah, good but not nice to know. OpenTherm is really popular in the Netherlands. Not nice because I know loads who have such a thermostat. Oh well.

[–] [email protected] 1 points 6 months ago

The good thing is: You can easily replace OpenTherm with KNX. Afaik there are Gateways that mimic Opentherm towards the heater so you can use KNC for the actual control.

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