KNX thermostat wall switch how to control air conditioning that has integrated in home assistant ?

[mighty reef]

I have a KNX thermostat wall switch , i want to use it to control air conditioning that have already working with home assistant. I don'n know which method is correct. There have two options, one option is using KNX plugin , another is using node-red as a communication or control bridge. Which one is stable and when KNX thermostat switch controlled air conditioning whether influences the air conditioning normal running in home assistant system? Does there have some suggestions for me or can buds give me a guiding.

[dense kindle]

Hi 👋!
You should be able to do this with the Knx integration.
What exactly do you want to control from that wall switch? On/off, target temperature, something else?
I'd start by doing an automation listening for knx.telegram triggers with the group addresses assigned to the switch. You can find details about this in the Knx integration documentation. https://www.home-assistant.io/integrations/knx/#triggers

[mighty reef]

i want KNX thermostat wall switch to control air conditioning (the aricon have been controlled in home assistant)， i am confused that how they combine together. Nodered or something.

[mighty reef]

For example ,temperature up or down, mode cooling or heating, turn on or off and room temperature current temperature and feedback adjustment temperature etc

[dense kindle]

You don't need any addon like Nodered for that. An automation can do that.

To update status to the Knx bus, use Knx expose (see documentation again).

[mighty reef]

Got it, i will try this solution. From my side I supposed to use Node-red, it can work with KNX and home assistant and can filter the unuseful KNX telegram , the KNX communication has a lot of noise telegram, i worry about this , fear that have influence our whole home assistant system running, especially the air conditioning system has a lot of noise telegram, a lot of current room temperature status and KNX thermostat room temperature sensor telegram.

[dense kindle]

I don't think there is anything that can be done with NR, that can't be done with plain HA regarding KNX. Filtering telegrams is quite basic - the trigger does it. Also there is probably no way to "overload" a proper HA installation with KNX telegrams - TP bus is way to slow for that anyway.
Apart from that, if you are more comfortable with NR, by all means just use it...

[mighty reef]

okay,bro. Thank you. i will try your suggestion.

[mighty reef]

can I see as doing a visual KNX thermostat in home assistant? Combine the truth and visual thermostat with automation function, and using KNX expose update and feedback status to KNX bus?

[dense kindle]

yes, but I'd recommend not to do a virtual climate entity.

Use the one you already have from the AC-integration and automate on that.

[mighty reef]

Are we in same time zone? UTC+8? Why response me so fast haha