switch:
  - platform: template
    id: climate_heater_switch
    optimistic: true
  - platform: template
    id: climate_cooler_switch
    optimistic: true

sensor:
  - platform: template
    id: climate_temperature_sensor
    lambda: |-
      return 21.5;
    update_interval: 60s

climate:
  - platform: bang_bang
    id: climate_test_climate
    name: Test Climate
    sensor: climate_temperature_sensor
    default_target_temperature_low: 18°C
    default_target_temperature_high: 24°C
    idle_action:
      - switch.turn_off: climate_heater_switch
      - switch.turn_off: climate_cooler_switch
    cool_action:
      - switch.turn_on: climate_cooler_switch
      - switch.turn_off: climate_heater_switch
    heat_action:
      - switch.turn_on: climate_heater_switch
      - switch.turn_off: climate_cooler_switch