Want to control your heating thermostats automatically via door and window contacts in Home Assistant? I'll show you how to do it ๐
Since I have now equipped my home with smart thermostats everywhere and fitted all the windows with corresponding contacts from Aqara, the question now arises as to how I can most cleverly switch the thermostats as soon as a window is opened.
Why all this? ๐ค
When I was still in the AVM ecosystem, it made sense to get the corresponding thermostats from AVM too. That also worked very well. However, the "ventilation mode" doesn't work very well with the thermostats in the old building. That's why I had to automate it via Home Assistant.
Prerequisites ๐
For this to work, you should have radiator thermostats and corresponding door and window contacts. It doesn't matter which manufacturer, the main thing is that they are already integrated into Home Assistant.
Then you should create the corresponding rooms as "areas" in Home Assistant and assign the sensors and thermostats to these areas.
The automation ๐ค
Once everything is done, create a new automation with the following content. Please adjust the corresponding lines:
- binary_sensor.window_bathroom
- binary_sensor.window_living_room
- binary_sensor.window_kids_room
- binary_sensor.window_bedroom
This list should contain your binary_sensor
window and door contacts.
alias: Heating off when window open
description: ""
trigger:
- platform: state
to:
- "on"
- "off"
entity_id:
- binary_sensor.window_bathroom
- binary_sensor.window_living_room
- binary_sensor.window_kinderzimmer
- binary_sensor.window_bedroom
condition: []
action:
- variables:
area: "{{ area_name(trigger.entity_id) }}"
targets: >
{{ expand(area_entities(area)) | selectattr('domain','eq','climate') |
map(attribute='entity_id') | join(',') }}
- choose:
- conditions:
- condition: template
value_template: "{{ trigger.to_state.state == 'on' }}"
sequence:
- service: scene.create
data:
scene_id: thermostat_settings_{{area | lower}}
snapshot_entities: "{{ targets }}"
- delay: 5
- service: climate.turn_off
target:
entity_id: "{{ targets }}"
- service: notify.notify
data:
title: "{{ state_attr(trigger.entity_id, 'friendly_name') }} open"
message: Heaters in {{ area }} switched off
- conditions:
- condition: template
value_template: "{{ trigger.to_state.state == 'off' }}"
sequence:
- service: scene.turn_on
target:
entity_id: scene.thermostat_settings_{{area | lower}}
- service: notify.notify
data:
title: "{{ state_attr(trigger.entity_id, 'friendly_name') }} closed"
message: Heaters in {{ area }} switched on
mode: parallel
max: 10
The automation is actually quite simple, because it does the following:
- Variable assignment:
- area = The triggering area
- targets = All entities with the domain
climate
, return only theentity_id
and separate with comma
- condition if the state of the entity is
on
:- Execute the sequence:
- Create a scene to cache the current state of the thermostat
- Wait 5 seconds
- Service
climate.turn_off
with the determined entity(ies) - Send notification
- Execute the sequence:
- Condition if the state of the entity is
off
:- The sequence contains:
- Turning on the previously saved scene (resetting the state before opening the windows)
- The sequence contains:
- Service
climate.turn_off
with the determined entity/entities - Send notification
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