Start carheater

car_heater.yaml

blueprint:
  name: Car heater
  description: Activate car heater based on sensor temperature
  domain: automation
  input:
    temp_sensor:
      name: Reference temperature sensor
      selector:
        entity:
          domain: sensor
          device_class: temperature
    car_heater_switch:
      name: Car heater switch
      selector:
        entity:
          domain: switch
    time_to_leave:
      name: Time to leave
      description: The time the car should be warm
      default: '7:00:00'
      selector:
        time: {}
    factor:
      name: Heat factor
      description: >
        The heating factor indicates how fast the car will get heated
         a value of 4.0 means that the car heats by 1/4° per minute (4 minutes per 1°C).
      default: 4.0
      selector:
        number:
          min: 0.1
          max: 10.0
          step: 0.1
          mode: slider
    comfy_temp:
      name: Comfort temperature
      description: Target temperature
      default: 18
      selector:
        number:
          min: 5
          max: 25
          step: 1
          unit_of_measurement: °C
          mode: slider
    notify_device:
      name: Device to notify
      description: Device needs to run the official Home Assistant app to receive notifications.
      selector:
        device:
          integration: mobile_app
    vacation_sensor:
      name: Vacation sensor (optional)
      description: Bolean sensor that indicates if current day is a workingday or not.
      default: none
      selector:
        entity:
          domain: bolean_sensor

variables:
  temp_sensor: !input temp_sensor
  comfort_temperature: !input comfy_temp
  heat_factor: !input factor
  # running_time_sec: "{{ (delta_temperature * heat_factor *60) | abs }}"  # will be -30 * 4 = -120 minutes (2h)
  manual_time: !input time_to_leave
trigger:
  - platform: time_pattern
    minutes: '*'
condition:
  - condition: template
    value_template: >-
      {%- set seconds = ((float(states(temp_sensor)) - 
      float(comfort_temperature)) * float(heat_factor) * 60) | abs %}
      {%- set nnow = now()%}
      {%- set time_diff = (as_timestamp(nnow.strftime("%Y-%m-%d ") ~ manual_time) - as_timestamp(nnow) ) -%}
      
      {{- (0 < time_diff <= seconds) or ((24*60*60)-seconds < time_diff*-1 < (24*60*60)) -}}
action:
  - service: switch.turn_on
    entity_id: !input car_heater_switch
  - domain: mobile_app
    type: notify
    device_id: 3a3076e1accc4fa8b5333d9bedc5c376
    message: >-
      {%- set seconds = ((float(states(temp_sensor)) - 
      float(comfort_temperature)) * float(heat_factor) 
      * 60) | abs -%}

      The car heater is turned on to have the car warm
      ({{comfort_temperature}}°C) at {{manual_time}}.
      Current outside temperature is {{
      states(temp_sensor) }}.
      Will run for {{ (seconds + (5 * 60)) / 60 }} minutes..
    title: 'Car heater {{ states(temp_sensor) }}°C @ {{now()}}'
  - wait_template: false
    continue_on_timeout: true
    timeout:
      seconds: >-
        {%- set seconds = ((float(states(temp_sensor)) - 
        float(comfort_temperature)) * float(heat_factor) 
        * 60) | abs %}
        {{- seconds + (5 * 60) -}}
  - service: switch.turn_off
    entity_id: !input car_heater_switch
  - domain: mobile_app
    type: notify
    device_id: 3a3076e1accc4fa8b5333d9bedc5c376
    message: >-
      {%- set seconds = ((float(states(temp_sensor)) - 
      float(comfort_temperature)) * float(heat_factor) 
      * 60) | abs -%}

      The car heater is turned OFF to have the car warm
      ({{ comfort_temperature }}°C) at {{manual_time}}.
      Was running for {{- seconds + (5 * 60) -}} secs.
    title: 'Car heater OFF {{ states(temp_sensor) }}°C @ {{now()}}'
mode: single