Make an input boolean based on a sensor attribute

Configuration
1

I would like to make an input boolean that is based on a sensor attribute. The sensor is sensor.pixel_5_bluetooth_connection and its attribute is connected_paired_devices which lists the MAC addresses of paired devices. I want the input boolean to be on if a particular MAC address is connected, and off otherwise.

The application for this is so that I can know if I’m driving around in a particular car so that I can open the correct garage door when I get home.

2

Don’t use an input_boolean. Use a template binary_sensor.

3

Thanks! After a bunch of tinkering, I ended up with this. In case it helps anyone.

template:
  - binary_sensor:
    - name: "Guy is in Mazda"
      state: >
        {% if '00:4E:00:4E:AC:EA' in state_attr('sensor.pixel_5_bluetooth_connection', 'connected_paired_devices') %}
          on
        {% else %}
          off
        {% endif %}

I used the if/else statement in the event that the phone happens to also be connected to other devices. This block of code searches for a particular MAC address in the string.