sensor:
  - platform: rest
    name: HeatPumpFreq
    unit_of_measurement: "Hz"
    resource: http://192.168.1.5/pump.json
    scan_interval: 120
    verify_ssl: false
    headers:
      User-Agent: Home Assistant
      Content-Type: application/json
    value_template: "{{ value_json[0].Structure.Floors[0].Devices[0].Device.HeatPumpFrequency }}"