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Clarify how to update state of group members (#21130)

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Co-authored-by: Franck Nijhof <git@frenck.dev>
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Erik Montnemery 2022-01-10 13:33:26 +01:00 committed by GitHub
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source/_integrations/group.markdown
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@ -65,6 +65,10 @@ icon:
By default when any member of a group is `on` then the group will also be `on`. Similarly with a device tracker, when any member of the group is `home` then the group is `home`. If you set the `all` option to `true` though, this behavior is inverted and all members of the group have to be `on` for the group to turn on as well.
## Group state update
The group's state is updated when any group member's state is updated. Calling `homeassistant.update_entity` with the target set to the group will not be forwarded to the group members, instead the `expand()` template function can be used to force all group members to update state.
## Group state calculation
The system can calculate group state with entities from the following domains: