OpenHAB also has identified the external button/switch, that I want to use and I can assign individual bulbs to it. But the switch defined in the sitemap does not show up as an option to bind to the switch.
How would I get this external button/switch mapped to my group ?
Can you rephrase that a bit? I’m guessing an external control of some kind. You have that linked to some Item yet? What happens with the Item when you operate the control? And you’re seeking a way to have that activity turned into an openHAB command your Group Item.
Well, I guess this channel is a switch type channel? Or is it an event channel? What does it do in your events.log?
That’s not going to “fit” a Dimmer type Item, so that’s those two out.
Group type Items get updated from their members, so it makes little sense to link that to a channel either.
The conventional approach here is to trigger a rule from your button press, and the rule goes on to do whatever it is that you want to the Group. The Group in turn has the magical behaviour of passing commands along to members.
There are possibly other approaches, depending on the nature of that channel.
The channel is triggered, when the button is pressed. It can trigger “system:rawbutton-on-off-switch”, “system:rawbutton-toggle-player” or “system:rawbutton-toggle-switch”.
So it for example can trigger an item of the type “color” or “dimmer” or “switch”. That’s the types of items, that PaperUI lists me as available items for the link. And those work.
However, it does not list the group, which also should be treated as a “dimmer” in reality.