Vaillant VR 921 / aroTherm plus heatpump

[joostvanderlinde]

Today the installation f my Vaillant aroTherm plus heatpump was finalized.
The heatpump is connected to the outside world via the VR 921 sensoNET gateway.
From what have understood this unit can be controlled (via the gateway) based on 'eebus' (not to be confused with ebus!)

Until now I did not find any comprehensive documentation on how to access the heatpump using the VR 921 (apart from the relatively useless Vaillant sensoApp).

My objective is to get information from the heatpump:

• Compressor state (percentage on)
  Circulation pump state (on/off)
  Heatpump temperature (from compressor=>inhouse setup, degrees)
  Heating buffer temperature (degrees)
  Hotwater vessel temperature (degrees)
  kWh heating generated
  kWh hot water generated
  Outside temperature

And to control the heatpump:

• Heating buffer temperature (degrees)
  Hotwater vessel temperature (degrees)

Is there anyone here that can point me in the right direction?

I noticed Vaillant has an API developer Programme https://developer.vaillant-group.com/products . I will try to get access to that as well...

[ArduiSens]

Hello all,
Is someone having experience with the (new) communication protocol used for energy devices like solar panel inverters, washing machines …? In Europe this protocol is trying to be the norm (many companies are supporting this protocol or are having the intention to do this). I read this protocol is available in the open domain.

Links found:
https://www.eebus.org/
https://www.eebus.org/media-downloads/#_SPECIFICATIONS
https://en.wikipedia.org/wiki/EEBUS
https://www.youtube.com/watch?v=VV0igaf1rZs

Dutch info: https://fwd.nl/smarthome/zo-werkt-eebus ... netwerken/

Are there ideas to interface with this protocol?

[Joost996me]

Same configuration here. Also interested in a possibility to import the data in Domoticz!

[FireWizard]

Hi,

More info:

https://discourse.nodered.org/t/eebus-know-how/17582

Regards

[Joost996me]

Thank you for the reaction, although I am afraid that I am not able to see any new information that makes me able to import data in Domoticz.

[joostvanderlinde]

Hi,

More info:

https://discourse.nodered.org/t/eebus-know-how/17582

Regards

Update in that thread (and similar to what I learnt from Vaillant): "Yes we do support Eebus via VR921, but unless you are a business partner you will not get access".
Very customer-minded I would say....

[gexters]

Did you get access at the Vaillant API developer Programme?
Are there no other options at this time?

[FireWizard]

Hi @gexters,

Have a look at this project: https://fromeijn.nl/connected-vaillant- ... assistant/

With MQTT and Node-RED you can integrate it in Domoticz.

Regards

[JanDeMan]

Thanks for the link to fromein.
Vailliant update the app but still al tot of information you want to see is missing.
Using domoticz I get an idea about the durations of the pump runs and starts.
But as I measure a phase were other equipment also uses power the data is not as good as I want to get it.

So, i like to get the data from the heating pump in Domorticz.
I still ordered an eebus interface card from germany but must wait for the next production batch.