HA Sensore livello acqua tanica irrigatore

- platform: template
  sensors:
    livello_tanica_irrigatore:
      friendly_name: "Livello tanica irrigatore"
      unit_of_measurement: '%'
      #icon_template: "hass:water-percent"
      icon_template: "hass:waves"
      value_template: >
        {% set level_params = {"min": 9, "max": 97 } %}
        {{ (100 - ((((float(states('sensor.ultrasonic_sensor'))*100)-level_params.min)*100) / (level_params.max - level_params.min))) | round(2) }}