{
  "schema": "pda-fieldbus.profile/v1",
  "device": {
    "manufacturer": "LUG",
    "model": "heat-meter-v4",
    "protocol": "mbus"
  },
  "meta": {
    "version": "1"
  },
  "points": {
    "energy": {
      "addr": "mbus/dif:0C/vif:0F",
      "unit": "gigajoule",
      "scale": 1e-9,
      "dimensions": "energy",
      "description": "Total heat energy"
    },
    "power": {
      "addr": "mbus/dif:0B/vif:2D",
      "unit": "kilowatt",
      "scale": 0.001,
      "dimensions": "power",
      "description": "Instantaneous thermal power"
    },
    "flow_temperature": {
      "addr": "mbus/dif:0A/vif:5B",
      "unit": "celsius",
      "dimensions": "temperature",
      "description": "Supply (flow) temperature"
    },
    "return_temperature": {
      "addr": "mbus/dif:0A/vif:5F",
      "unit": "celsius",
      "dimensions": "temperature",
      "description": "Return temperature"
    },
    "volume_flow": {
      "addr": "mbus/dif:0B/vif:3B",
      "unit": "cubic_metre_per_hour",
      "dimensions": "flow",
      "description": "Volumetric flow rate"
    }
  },
  "derived": {
    "delta_temperature": {
      "function": "sub",
      "inputs": ["flow_temperature", "return_temperature"],
      "unit": "celsius",
      "dimensions": "temperature",
      "description": "Flow minus return temperature"
    }
  }
}