sensor:
  - platform: htu21d
    id: htu21d_sensor
    i2c_id: i2c_bus
    model: htu21d
    temperature:
      name: Temperature
    humidity:
      name: Humidity
    heater:
      name: Heater
    update_interval: 15s

button:
  - platform: template
    name: "Test HTU21D Actions"
    on_press:
      - htu21d.set_heater:
          id: htu21d_sensor
          status: true
      - htu21d.set_heater_level:
          id: htu21d_sensor
          level: 5