hassconfig/blueprints/template/homeassistant/inverted_binary_sensor.yaml

blueprint:
  name: Invert a binary sensor
  description: Creates a binary_sensor which holds the inverted value of a reference binary_sensor
  domain: template
  source_url: https://github.com/home-assistant/core/blob/dev/homeassistant/components/template/blueprints/inverted_binary_sensor.yaml
  input:
    reference_entity:
      name: Binary sensor to be inverted
      description: The binary_sensor which needs to have its value inverted
      selector:
        entity:
          domain: binary_sensor
variables:
  reference_entity: !input reference_entity
binary_sensor:
  state: >
    {% if states(reference_entity) == 'on' %}
      off
    {% elif states(reference_entity) == 'off' %}
      on
    {% else %}
      {{ states(reference_entity) }}
    {% endif %}
  # delay_on: not_used in this example
  # delay_off: not_used in this example
  # auto_off: not_used in this example
  availability: "{{ states(reference_entity) not in ('unknown', 'unavailable') }}"