I saw in the documentation, that it is possible to use vacuums with google assistant. But I only saw that thw switch has the ga=Vacuum tag. So I guess it is to start / stop the vacuum.
Is it also already implemented to say: “Return to dock” or something similar with openhab?
Not sure if they works straight away, but would be nice if it would.
A workaround could be to define an on/off switch named dock or something, pipe it into Google assistant and create a rule that when activated the vacuum should go back to the dock.
No. So far the Vacuum is only available as a single switch. You may add your feature request to the project at GitHub · Where software is built
+1 for this feature request. As I understand from the Traits: Cloud-to-cloud | Google Home Developers
Those channels were available within Google Assistant/Google Home:
mandatory:
action.devices.traits.StartStop
recommended:
action.devices.traits.Dock
action.devices.traits.EnergyStorage
action.devices.traits.Locator
action.devices.traits.OnOff
action.devices.traits.RunCycle
So there is still something more that could be included the Openhab 