home-assistant.io/source/_docs/automation/templating.markdown

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Automation Trigger Variables	List all available variables made available by triggers.

Automations support templating in the same way as scripts do. In addition to the Home Assistant template extensions available to scripts, the trigger and this template variables are available.

The template variable this is also available when evaluating any trigger_variables declared in the configuration.

Available this Data

Variable this is the state object of the automation. State objects also contain context data which can be used to identify the user that caused a script or automation to execute.

Available Trigger Data

The following tables show the available trigger data per platform.

All

The following describes trigger data associated with all platforms.

Template variable	Data
trigger.id	Optional trigger id, or index of the trigger.
trigger.idx	Index of the trigger.

Device

Template variable	Data
trigger.platform	Hardcoded: device.
trigger.event	Event object that matched.
trigger.event.event_type	Event type.
trigger.event.data	Optional event data.

Event

Template variable	Data
trigger.platform	Hardcoded: event.
trigger.event	Event object that matched.
trigger.event.event_type	Event type.
trigger.event.data	Optional event data.

MQTT

Template variable	Data
trigger.platform	Hardcoded: mqtt.
trigger.topic	Topic that received payload.
trigger.payload	Payload.
trigger.payload_json	Dictionary of the JSON parsed payload.
trigger.qos	QOS of payload.

Numeric State

Template variable	Data
trigger.platform	Hardcoded: numeric_state
trigger.entity_id	Entity ID that we observe.
trigger.below	The below threshold, if any.
trigger.above	The above threshold, if any.
trigger.from_state	The previous state object of the entity.
trigger.to_state	The new state object that triggered trigger.
trigger.for	Timedelta object how long state has met above/below criteria, if any.

State

Template variable	Data
trigger.platform	Hardcoded: state
trigger.entity_id	Entity ID that we observe.
trigger.from_state	The previous state object of the entity.
trigger.to_state	The new state object that triggered trigger.
trigger.for	Timedelta object how long state has been to state, if any.

Sun

Template variable	Data
trigger.platform	Hardcoded: sun
trigger.event	The event that just happened: sunset or sunrise.
trigger.offset	Timedelta object with offset to the event, if any.

Template

Template variable	Data
trigger.platform	Hardcoded: template
trigger.entity_id	Entity ID that caused change.
trigger.from_state	Previous state object of entity that caused change.
trigger.to_state	New state object of entity that caused template to change.
trigger.for	Timedelta object how long state has been to state, if any.

Time

Template variable	Data
trigger.platform	Hardcoded: time
trigger.now	DateTime object that triggered the time trigger.

Time Pattern

Template variable	Data
trigger.platform	Hardcoded: time_pattern
trigger.now	DateTime object that triggered the time_pattern trigger.

Webhook

Template variable	Data
trigger.platform	Hardcoded: webhook
trigger.webhook_id	The webhook ID that was triggered.
trigger.json	The JSON data of the request (if it had a JSON content type).
trigger.data	The form data of the request (if it had a form data content type).
trigger.query	The URL query parameters of the request (if provided).

Zone

Template variable	Data
trigger.platform	Hardcoded: zone
trigger.entity_id	Entity ID that we are observing.
trigger.from_state	Previous state object of the entity.
trigger.to_state	New state object of the entity.
trigger.zone	State object of zone
trigger.event	Event that trigger observed: enter or leave.

Examples

{% raw %}

# Example configuration.yaml entries
automation:
  trigger:
    - platform: state
      entity_id: device_tracker.paulus
      id: paulus_device
  action:
    - service: notify.notify
      data:
        message: >
          Paulus just changed from {{ trigger.from_state.state }}
          to {{ trigger.to_state.state }}
          
          This was triggered by {{ trigger.id }}

automation 2:
  trigger:
    - platform: mqtt
      topic: "/notify/+"
  action:
    service: >
      notify.{{ trigger.topic.split('/')[-1] }}
    data:
      message: "{{ trigger.payload }}"

automation 3:
  trigger:
    # Multiple entities for which you want to perform the same action.
    - platform: state
      entity_id:
        - light.bedroom_closet
        - light.kiddos_closet
        - light.linen_closet
      to: "on"
      # Trigger when someone leaves one of those lights on for 10 minutes.
      for: "00:10:00"
  action:
    - service: light.turn_off
      target:
        # Turn off whichever entity triggered the automation.
        entity_id: "{{ trigger.entity_id }}"

{% endraw %}