Location notification on state change only when hasn't changed in last 3 minutes

1

So the problem I have is I get multiple notifications when moving in or out of zones, presumably because of GPS inaccuracy on the border of the location radius. What I want to do, is add a condition that the notification only sends if that particular entity (the person) hasn’t already been notified in the last 3 minutes.

Working code is first, and then an attempt at what I’m trying to do comes after:

trigger:
  - platform: state
    entity_id:
    - person.alec_down
    - person.kelsey_down
    - person.christopher_hansen
    for:
      hours: 0
      minutes: 0
      seconds: 30
  condition:
  - condition: template
    value_template: '{{  trigger.from_state.state != trigger.to_state.state }}'
  action:
  - service: notify.notify
    data_template:
      message: '{{ trigger.to_state.attributes.friendly_name }} {% if trigger.to_state.state
        == ''not_home'' %}has left {{ trigger.from_state.state }}{% endif %}{% if
        trigger.from_state.state == ''not_home'' %}arrived at {{ trigger.to_state.state
        }}{% endif %}.'

And so I basically want to add a second condition that’ll look something like this, but not sure how to dynamically insert the last_changed on the entity.

  - condition: template
    value_template: "{{ as_timestamp(now()) - as_timestamp(states.{{ trigger.entity_id }}.last_changed) >= 180 }}"

Any ideas? Does this look right? Can I even use {{ }} in a condition?