I'm developing a Smart Home API skill and device groups work strange for me. Turning on/off for groups works well. But when i try to use another group command it doesn't work.
For example I have group called Garage and when i'm trying to set fan speed ("Set fan speed to max on Garage") or turn up fan speed ("Turn up fan speed for Garage") it returns "Garage doesn't support that."
Does anyone knows why device groups works this way?
As i understood from documentation group commands should work without any additional configuration.