Adding a device to an Area; confused about entity definitions

Configuration
1

I have a set of automations working fine, that pull the booking status of a meeting room from google calendar and then set some Philips Hue lights outside the room. green/amber/red as appropriate.

When originally set up there were two lights called light.hue_play_1 and light.hue_play_dc and an entity called light.fnl which seems somehow (I cannot recall how!) to group them - so the automation only talks about light.fnl.

I added another light. But I cannot figure out how to get light.fnl to include it. it’s called light_hue_play_1_2.

The dashboard shows this

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And devices shows …

p1
p11842×563 32.5 KB

Moreover, I seem not to be able to change light.fnl from the UI, with this message … (is there a way to give it a unique ID?)

p3
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Seems to me that the new device (_1_2) should be in Area FNL, and that light.fnl should include it as well.

Any help most gratefully received!

Thanks!

Pat

2

Do you have a group on the Hue side that is called FNL? If so, add the new light to the group on the Hue side. If not, check if you have configured somewhere a light group in home assistant

3

Hi, thanks for replying. No … there are no groups as far as I can see … the groups.yaml file is empty!

In the deprecated States UI I see this … which seems right???

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Should I populate the groups.yaml file??

Confused!

4

This is strange, are you sure that you have no groups (I think they are called zones or rooms in Hue) in the Hue app?

To create a light group add the following to configuration.yaml:

light:
  - platform: group
    name: Meeting Room Lights
    entities:
      - light.xy
      - light.ab
      - light.cd

This will create a light group called light.meeting_room_lights, which you can use like a normal light afterwards.