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The Edge Node BIRTH message will contain the following:

  • The Sparkplug elements: Namespace, Group ID, Edge Node ID. They will be grouped under "topic" along with Edge Node Descriptor and Message Type
  • A "timestamp" for when the payload was constructed
  • A "bdSeq" sequence number to track the "session" of the Tag Agent
  • Any Edge Node tags defined in the Edge Node folder (in our example we have none).
  • A message sequence number


Code Block
{
  "topic": {
    "namespace": "spBv1.0",
	"edgeNodeDescriptor": "G1/E1",
    "groupId": "G1",
    "edgeNodeId": "E1"
	"type": "NBIRTH"
  },
  "payload": {
    "timestamp": 1638223073190,
    "metrics": [
      {
        "name": "bdSeq",
        "timestamp": 1638223073187,
        "dataType": "Int64",
        "value": 0
      }
    ],
    "seq": 0
  }
}


The Device BIRTH message will contain the following:

  • The Sparkplug elements: Namespace, Group ID, Edge Node ID, Device ID.  They will be grouped under "topic" along with Message Type
  • A "timestamp" for when the payload was constructed
  • Any Device tags defined in the Device folder
  • A message sequence number


Code Block
{
  "topic": {
      "namespace": "spBv1.0",
      "edgeNodeDescriptor": "G1/E1",
      "groupId": "G1",
      "edgeNodeId": "E1",
      "deviceId": "D1",
      "type": "DBIRTH"
  },
  "payload": {
    "timestamp": 1638223073192,
    "metrics": [
        {
            "name": "T1",
            "timestamp": 1638223073192,
            "dataType": "Int32",
            "metaData": {},
            "properties": {
                "Quality": {
                    "type": "Int32",
                    "value": 192
                }
            },
            "value": 12
        }
    ],
    "seq": 1
  }
}


The Device DDATA message will contain the following:

  • The Sparkplug elements: Namespace, Group ID, Edge Node ID, Device ID.  They will be grouped under "topic" along with Message Type
  • A "timestamp" for when the payload was constructed
  • Any Device tags defined in the "Device folder that have changed
  • A message sequence number


Code Block
{
  "topic": {
    "namespace": "spBv1.0",
	"edgeNodeDescriptor": "G1/E1",
    "groupId": "G1",
    "edgeNodeId": "E1",
    "deviceId": "D1"
	"type": "DDATA"
  },
  "payload": {
    "timestamp": 1638223663812,
    "metrics": [
      {
        "name": "T1",
        "timestamp": 1638223662800,
        "dataType": "INT32",
        "value": 100
      }
    ],
    "seq": 2
  }
}



Understanding and decoding Ignition QualityCodes