sarah/packages/devices/bathroom/bathroom_switch.yaml

input_number:
  bathroom_high_volume:
    name: Bathroom high volume
    min: 0
    max: 1
    step: 0.05
    icon: mdi:speaker

automation:
  - alias: Bathroom · Switch
    use_blueprint:
      path: aqara_switch.yaml
      input:
        action_entity: sensor.bathroom_switch_action
        click:
          - service: media_player.volume_set
            entity_id: media_player.bathroom
            data_template:
              volume_level: >-
                {% if state_attr('media_player.bathroom', 'volume_level')|float > (states('input_number.bathroom_high_volume')|float - 0.05) %}
                  0.25
                {% else %}
                  {{ states('input_number.bathroom_high_volume')|float }}
                {% endif %}