Home Assistant – Where is my car?

Haven’t we all had that moment when we couldn’t remember where we parked our car?
Whether you’re on the road or at home (for those who don’t have a garage), it can be helpful to have Home Assistant save the current location of your car.

First, we need three helpers: two text input helpers and one template sensor.
We’ll call the text input helpers car_longitude and car_latitude. The GPS values will be stored here later. We’ll call the template sensor ‘Car Location’. This will be used later to display the location of the car on a map.

We’ll create the template sensor via configuration.yaml.
To do this, add the following lines to configuration.yaml:

template:
  - sensor:
      - name: "Car Location"
        unique_id: car_location
        state: "home"
        attributes:
          latitude: "{{ '%.6f' | format(states('input_text.car_latitude') | float(0)) }}"
          longitude: "{{ '%.6f' | format(states('input_text.car_longitude') | float(0)) }}"
          gps_accuracy: 1 

Now let’s create an automation. I’ve called it ‘Save parking space’.

The trigger is the moment my smartphone loses its connection to Android Auto. In other words, when I get out of the car.

I then wait until my smartphone’s GPS accuracy is below 10.

Then I save the longitude and latitude in the helpers I created earlier.

alias: "Save parking"
description: ""
triggers:
  - type: not_connected
    device_id: dc58cc5bcfe3fef831a864f2c7c38f9a #YOUR SMARTPHONE
    entity_id: 144b26f09533717e576cb63f1156d1a3 #ANDROID AUTO
    domain: binary_sensor
    trigger: device
conditions: []
actions:
  - wait_for_trigger:
      - trigger: numeric_state
        entity_id:
          - person.christopher #YOUR PERSON ENTITY
        attribute: gps_accuracy
        below: 10
    timeout:
      hours: 0
      minutes: 0
      seconds: 30
    enabled: true
  - action: input_text.set_value
    metadata: {}
    data:
      value: "{{state_attr('device_tracker.motorola_razr_60_ultra_2', 'latitude') }}" #LATITUDE OF YOUR SMARTPHONE
    target:
      entity_id: input_text.car_latitude
  - action: input_text.set_value
    metadata: {}
    data:
      value: "{{state_attr('device_tracker.motorola_razr_60_ultra_2', 'longitude') }}" #LONGITUDE OF YOUR SMARTPHONE
    target:
      entity_id: input_text.car_longitude
mode: single

Finally, we add a map to our dashboard using the entity ‘sensor.car_location’:

type: map
entities:
  - entity: sensor.car_location
theme_mode: dark
default_zoom: 18

Bonus

You can create a button to navigate to your car using Google Maps.

To do this, add a ‘Markdown map’ to your dashboard and use this content:

[Navigate](https://www.google.com/maps?q={{ states('input_text.car_latitude') }},{{ states('input_text.car_longitude') }}) 

In the end, it looks like this (CL stands for ‘car location’):