How do you nest groups in a card?

Configuration
1

I’m trying to get a view that has two cards each made up of multiple groups:

If I create a group view with each individual group I get 6 cards.

However if I try to group them into two parent cards it shows a bunch of unknown.

comfort:
  view: yes
  entities:
    - group.upstairsComfort
    - group.downstairsComfort
upstairsComfort:
  entities:
    - group.upstairsTemperature
    - group.upstairsHumidity
    - group.upstairsOccupancy
    - group.upstairsEcobee
downstairsComfort:
  entities:
    - group.downstairsTemperature
    - group.downstairsHumidity
    - group.downstairsOccupancy
    - group.downstairsEcobee
upstairsTemperature:
  name: Upstairs Temperature
  entities:
    - binary_sensor.upstairs_temperature
    - binary_sensor.kitchen_temperature
    - binary_sensor.office_temperature
    - binary_sensor.bedroom_temperature
downstairsTemperature:
  name: Upstairs Temperature
  entities:
    - binary_sensor.downstairs_temperature
    - binary_sensor.basement_temperature
upstairsHumidity:
  name: Upstairs Humidity
  entities:
    - sensor.upstairs_humidity
downstairsHumidity:
  name: Downstairs Humidity
  entities:
    - sensor.downstairs_humidity
upstairsOccupancy:
  name: Upstairs Occupancy
  entities:
    - binary_sensor.upstairs_occupancy
    - binary_sensor.kitchen_occupancy
    - binary_sensor.office_occupancy
    - binary_sensor.bedroom_occupancy
downstairsOccupancy:
  name: Upstairs Occupancy
  entities:
    - binary_sensor.downstairs_occupancy
    - binary_sensor.basement_occupancy
upstairsEcobee:
  name: Upstairs Ecobee
  entities:
    - climate.upstairs
downstairsEcobee:
  name: Downstairs Ecobee
  entities:
    - climate.downstairs
2

I know you can nest one level down of groups in a view but I’m not sure you can do two levels.

even if you do one level down of groups in a card you won’t see the second nest in the card. you have to click on the first group and it then opens up a new “window” with the entities of the nested group in it.

At least that’s my experience. but I’m kind of a noob too so i could be completely wrong!

try to not nest the second group down and see if everything displays OK with that. then move on from there.

3

You can use the nested groups to help layout the page a bit. I used this to split this view into a side by side layout.

  Entertainment:
    view: yes
    entities:
    - group.Sonos_1
    - group.Sonos_2
    - media_player.roku3
    
  Sonos_1:
    - media_player.tv_room
    - media_player.kitchen
  Sonos_2:
    - media_player.living_room
    - media_player.master_bedroom
4

I’m trying to go one layer deeper than that:

With your example it would be something like this:

  Entertainment:
    view: yes
    entities:
    - group.LivingRoom
    - group.Bedroom
  LivingRoom:
    - group.Sonos
  Bedroom:
    - group.Roku
  Roku
    entities:
      - media_player.roku3
      - media_player.roku4
  Sonos
    entities:
      - media_player.tv_room
      - media_player.living_room
5

I can see where that would be nice, but I think that would take someone to do some serious code work.