christmas-tree-water.yaml

esphome:
    name: christmas-tree-water
    platform: ESP8266
    board: d1_mini
    comment: Christmas Tree Water
  
<<: !include includes/common.yaml

sensor:
  - platform: ultrasonic
    trigger_pin: D1
    echo_pin: D2
    name: "Ultrasonic Sensor"
    update_interval: 180s
    unit_of_measurement: "%"
    accuracy_decimals: 0
    filters:
    - lambda: if (x > 0.12) { return 0; } else if (x < 0.02) { return 100; } else { return x * (-1000) + 120; }