home-assistant.github.io/source/getting-started/automation-templating.markdown

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page	Automation Templating	Advanced automation documentation using templating.	2016-04-24 08:30 +0100	true	false	true	true

In Home Assistant 0.19 we introduced a new powerful feature: variables in scripts and automations. This makes it possible to adjust your condition and action based on the information of the trigger.

The trigger data made is available during template rendering as the trigger variable.

# Example configuration.yaml entries
automation:
  trigger:
    platform: state
    entity_id: device_tracker.paulus
  action:
    service: notify.notify
    data_template:
      message: >{% raw %}
        Paulus just changed from {{ trigger.from_state.state }}
        to {{ trigger.to_state.state }}{% endraw %}

automation 2:
  trigger:
    platform: mqtt
    topic: /notify/+
  action:
    service_template: >{% raw %}
      notify.{{ trigger.topic.split('/')[-1] }}{% endraw %}
    data_template:
      message: {% raw %}{{ trigger.payload }}{% endraw %}

{% linkable_title Available Trigger Data %}

The following tables show the available trigger data per platform.

Template variable	Data
trigger.platform	Hardcoded: event.
trigger.event	Event object that matched.

Template variable	Data
trigger.platform	Hardcoded: mqtt.
trigger.topic	Topic that received payload.
trigger.payload	Payload.
trigger.qos	QOS of payload.

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 of the entity.
trigger.to_state	The new state that triggered trigger.

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

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 variable	Data
trigger.platform	Hardcoded: template
trigger.entity_id	Entity ID that caused change.
trigger.from_state	Previous state of entity that caused change.
trigger.to_state	New state of entity that caused template to change.

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

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