Power state alert notification

Configuration
1

I use the following automation that triggers when the power usage drops below 10. It works, but annoyingly repeats again and again.

The original code was

alias: Tumble Dryer finished
description: ''
trigger:
  - platform: numeric_state
    entity_id: sensor.tumble_dryer_power
    for:
      hours: 0
      minutes: 0
      seconds: 5
    attribute: power
    below: '10'
condition:
    - condition: time
      after: '10:00:00'
      before: '22:00:00'
    - condition: state
      entity_id: input_boolean.mute_echos_switch
      state: 'off'
action:
  - service: notify.mobile_app_bobs_iphone
    data:
      message: Tumble dryer has finished
      title: Home Assistant Alert!
  - service: notify.alexa_media
    data:
      data:
        type: announce
        method: speak
      message: The tumble dryer has finished
      target:
        - media_player.loungeecho
        - media_player.kitchenecho
  - service: notify.lounge_tv
    data:
      message: The tumble dryer has finished
mode: single

After doing some research I’ve tried the following code, but it’s not showing as valid?

alias: Tumble Dryer finished
description: ''
trigger:
  - platform: numeric_state
    entity_id: sensor.tumble_dryer_power
    for:
      hours: 0
      minutes: 0
      seconds: 5
    attribute: power
    below: '10'
condition:
    - condition: time
      after: '10:00:00'
      before: '22:00:00'
    - condition: state
      entity_id: input_boolean.mute_echos_switch
      state: 'off'
   - condition: template
      value_template: "{{ ( as_timestamp(now()) - as_timestamp(state_attr('automation.tumble_dryer_finished.attributes.last_triggered', 'last_triggered')) |int(0) ) > 5 }}"
action:
  - service: notify.mobile_app_bobs_iphone
    data:
      message: Tumble dryer has finished
      title: Home Assistant Alert!
  - service: notify.alexa_media
    data:
      data:
        type: announce
        method: speak
      message: The tumble dryer has finished
      target:
        - media_player.loungeecho
        - media_player.kitchenecho
  - service: notify.lounge_tv
    data:
      message: The tumble dryer has finished
mode: single
2

Does it reach 0 when you turn it off completely?
If so then you could keep what you have but add as an action to turn on a boolean.
Then have another automation that when it’s 0 turn off the boolean.

3

There’s a blueprint for just this use case :