pi@raspberrypi:~ $ mbus-serial-request-data -b 2400 /dev/ttyUSB0 0 | xq .
{
  "MBusData": {
    "SlaveInformation": {
      "Id": "23551234",
      "Manufacturer": "EFE",
      "Version": "0",
      "ProductName": "Engelmann / Elster SensoStar 2",
      "Medium": "Heat: Inlet",
      "AccessNumber": "243",
      "Status": "00",
      "Signature": "0000"
    },
    "DataRecord": [
      {
        "@id": "0",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Fabrication number",
        "Value": "23551234",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "1",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Energy (kWh)",
        "Value": "2357",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "2",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Volume (m m^3)",
        "Value": "639022",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "3",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Power (W)",
        "Value": "6555",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "4",
        "Function": "Maximum value",
        "StorageNumber": "0",
        "Unit": "Power (W)",
        "Value": "174712",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "5",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Volume flow (m m^3/h)",
        "Value": "2033",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "6",
        "Function": "Maximum value",
        "StorageNumber": "0",
        "Unit": "Volume flow (m m^3/h)",
        "Value": "5263",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "7",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Flow temperature (deg C)",
        "Value": "35",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "8",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Return temperature (deg C)",
        "Value": "32",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "9",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Temperature Difference (1e-2  deg C)",
        "Value": "279",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "10",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "On time (days)",
        "Value": "78",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "11",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Time Point (time & date)",
        "Value": "2022-11-23T18:30:00",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "12",
        "Function": "Instantaneous value",
        "StorageNumber": "1",
        "Unit": "Energy (kWh)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "13",
        "Function": "Instantaneous value",
        "StorageNumber": "1",
        "Unit": "Volume (m m^3)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "14",
        "Function": "Instantaneous value",
        "StorageNumber": "1",
        "Unit": "Time Point (date)",
        "Value": "2000-00-00",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "15",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Error flags",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "16",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Unit": "Model / Version",
        "Value": "5",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "17",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Tariff": "2",
        "Device": "0",
        "Unit": "Energy (kWh)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "18",
        "Function": "Instantaneous value",
        "StorageNumber": "1",
        "Tariff": "2",
        "Device": "0",
        "Unit": "Energy (kWh)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "19",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Tariff": "3",
        "Device": "0",
        "Unit": "Energy (kWh)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "20",
        "Function": "Instantaneous value",
        "StorageNumber": "1",
        "Tariff": "3",
        "Device": "0",
        "Unit": "Energy (kWh)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "21",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Tariff": "0",
        "Device": "1",
        "Unit": "Volume (m m^3)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "22",
        "Function": "Instantaneous value",
        "StorageNumber": "1",
        "Tariff": "0",
        "Device": "1",
        "Unit": "Volume (m m^3)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "23",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Tariff": "0",
        "Device": "2",
        "Unit": "Volume (m m^3)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "24",
        "Function": "Instantaneous value",
        "StorageNumber": "1",
        "Tariff": "0",
        "Device": "2",
        "Unit": "Volume (m m^3)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "25",
        "Function": "Instantaneous value",
        "StorageNumber": "0",
        "Tariff": "0",
        "Device": "3",
        "Unit": "Volume (m m^3)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      },
      {
        "@id": "26",
        "Function": "Instantaneous value",
        "StorageNumber": "1",
        "Tariff": "0",
        "Device": "3",
        "Unit": "Volume (m m^3)",
        "Value": "0",
        "Timestamp": "2022-11-23T17:31:00Z"
      }
    ]
  }