@pvizeli, thanks for your PR! By analyzing the history of the files in this pull request, we identified @fabaff and @aequitas to be potential reviewers.

Thanks for jumping on this. I didn't have time to investigate it yet.

However dropping 'automatic group adding' as a feature completely is the wrong direction for this component.

The nature of these devices can cause a lot unwanted entries to appear if automatic detection is enabled (rflink devices from neighbors mostly). And not everyone might like to have to manually add all their devices to config (or have to change config/restart to detect new devices).

What would be the best solution in line with best practices according to you?

A reboot are not needed for group changes and now it could be done on UI.

Devices are change not every day. So you need setup your stuff once and not setup every start. So it is not need on platform level too

Makes sense.

@pvizeli consider bundling this feature with the bugfix: pvizeli#1

I had it planned already to bring rflink inline with other components. If its not included users won't be able to prevent their homepage being flooded with unwanted devices.

This PR broke the Lutron component. I wish I had a change to review and test.

File "/home/pi/home-assistant/homeassistant/helpers/entity.py", line 204, in async_update_ha_state
 "No entity id specified for entity {}".format(self.name))
homeassistant.exceptions.NoEntitySpecifiedError: No entity id specified for entity Exterior Sconces

Seems like you removed setting entity_id by only setting object_id, which isn't enough.

By the way, I disagree with the notion about auto-grouping. The way Lutron software works it effectively forces you to organize the devices into rooms (areas) and places in the room. This is already, thus, forcing you to create groups. That's also how it shows up in the Lutron software, and is self described by the XML file we parse on startup. Dropping that structure on the floor and forcing the user to recreate it seems counter-productive. If you want to add an option to turn-off the auto-grouping for those who want to go the manual route that's fine, but getting rid of this feature seems wrong.