[App][Pro] Viessmann App for Homey Pro

Hi,

Today I noticed that my gas boiler stopped responding to commands from Homey. My Flows also stopped working. It seems this happened sometime during the day.

I tried:

  • reinstalling the app

  • removing and adding the devices again

  • generating a new Client ID

Unfortunately, nothing helped.

The device is added correctly in Homey and all parameters are visible. Also, changes made in the ViCare app are reflected in Homey after a short delay, so read access seems to work correctly.

The problem is with write access:

  • changing the operating mode in Homey does nothing

  • changing the target temperature also does nothing

  • after a short while, the value in Homey reverts to the value currently set in ViCare

Additionally, the mode labels now seem wrong.

Homey currently shows:

  • Automatic

  • Heating

  • Cooling

  • Off

Previously, it showed:

  • Hot water only

  • Heating and hot water

  • Off

So it looks like Homey can read values, but cannot write changes, and the operating mode mapping may also be incorrect.

Thanks.