iotkit-gateway

==============

This repository contains a Bridge between MQTT and Kafka for OISP. The Bridge also handles the auth, acl and load-balancing for MQTT and MQTT with SparkplugB

1. To enable SparkplugB Data Ingestion capability only at GW

To enable sparkplugB functionality, add config related to sparkplugB in the config.js

1. Add below section in the config section on file config.js

SparkplugB config which must be set when handling SparplugB standard message

• @spBKafkaProduce: true -> will enable producing kafka message on topic "SparkplugB" with spB format data @ngsildKafkaProduce: true -> will enable producing kafka message on topic "ngsildSpB" with ngsild format data
• @subscribe -> Subscribed to all the topic with "spBv1.0" at start

     "sparkplug": {
        "spBKafkaProduce": true, 
        "spBkafkaTopic": "sparkplugB",
        "ngsildKafkaProduce": false,
        "ngsildKafkaTopic": "ngsildSpB"
        "topics": {
            "subscribe": {
                "sparkplugb_data_ingestion": "spBv1.0/+/+/+/+"
            },
            "publish": {
            "error": "server/error/{accountId}/{deviceId}"
             }
        }
    },

2. SpB-mqttgw uses different name of kafka client to get distinguished (ClientId: spBFrontend-metrics)
3. SparkplugB standard message with data metric element. Data message looks like below:

    
    var DataMessage = {
            timestamp: 12345,
            metrics: [{
                name : "temp",
                timestamp : 12345,
                dataType : "float",
                value: 123
            }],
            seq: 1
         };

1. To enable NGSI-LD Data Ingestion capability over SpB at GW

1. To enable NGSI-LD format data sharing, set flag of sparkplugB and NGSI-ld true as shown below

@ngsildKafkaProduce: true -> will enable producing kafka message on topic "ngsildSpB" with ngsild format data for metric whose names are like : name: "Relationship/xxxx" or "Property/xxxx"

     "sparkplug": {
        "spBKafkaProduce": false, 
        "spBkafkaTopic": "sparkplugB",
        "ngsildKafkaProduce": true, 
        "ngsildKafkaTopic": "ngsildSpB"
        "topics": {
            "subscribe": {
                "sparkplugb_data_ingestion": "spBv1.0/+/+/+/+"
            },
            "publish": {
            "error": "server/error/{accountId}/{deviceId}"
             }
        }
    },

• Config Table for Different flag setting when SparkplugB is enable "enabled": true;

spBKafkaProduce	ngsildKafkaProduce	KafkaTopic
true	true	SpB NGSI-LD format metric on "ngsildSpB" topic; Rest on "sparkplugB"
true	false	All message on "sparkplugB"
false	true	SpB NGSI-LD format metric on "ngsildSpB" topic; Rest ignored

2. NGSI-LD message format converted from received SpB message format

• For conversion of Relationship NGSI-LD Data

Eg. of SpB message payload containing NGSI-LD format Relationship Data:

{
    "timestamp":1655974018778,"
    "metrics":
	    [{
	    "name":"Relationship/https://industry-fusion.com/types/v0.9/hasFilter",
	    "timestamp":1655974018777,
	    "dataType":"string",
	    "value":"urn:filter:1"}],
    "seq":2
},

Eg. of SpB Converted into NGSI-LD Relationship data format:

{
  “id”: “urn:plasmacutter:1\\https://industry-fusion.com/types/v0.9/hasFilter”,
  “entityId”: “urn:plasmacutter:1”,
  “name”: “https://industry-fusion.com/types/v0.9/hasFilter”,
  “type”: “https://uri.etsi.org/ngsi-ld/Relationship”,
  “https://uri.etsi.org/ngsi-ld/hasObject”: “urn:filter:1”,
  “nodeType”: “@id”,
  “index”: 0
}

• For conversion of Property NGSI-LD Data with nodeType @value(Means literals)

{
    "timestamp":1655974018778,"
    "metrics":
	    [{
	    "name":"Property/https://industry-fusion.com/types/v0.9/state",
	    "timestamp":1655974018777,
	    "dataType":"string",
	    "value":"https://industry-fusion.com/types/v0.9/state_OFF"}],
    "seq":2
},

Eg. of SpB Converted into NGSI-LD Property data format:

{
  “id”: “urn:plasmacutter:1\\https://industry-fusion.com/types/v0.9/state”,
  “entityId”: “urn:plasmacutter:1”,
  “name”: “https://industry-fusion.com/types/v0.9/state”,
  “type”: “https://uri.etsi.org/ngsi-ld/Property”,
  “https://uri.etsi.org/ngsi-ld/hasValue”: “https://industry-fusion.com/types/v0.9/state_OFF”,
  “nodeType”: “@value”,
  “index”: 0
}

• For conversion of Property NGSI-LD Data with nodeType @id (Means IRI type)

SpB message payload containing NGSI-LD format of Property with IRI type i.e @id Will be Template. It will be added in next release of it. Eg. of template Spb data can be as below:

timestamp: 12345,
	metrics: [{
                name : "propertyInstanceIRI",
                type : template,
                timestamp : 12345,
                value: {
		   “templateRef” : “propertyTemplate”
		   “isdefination”:  false,
		   “metrics”: [
		    {   “name”: "https://industry-fusion.com/types/v0.9/state",
                “dataType” : “string”-> always string
                “ valueType” : “@id”,
                “value”:  "https://industry-fusion.com/types/v0.9/state_OFF",
                "index": 0
            }]
		 }
	  }],
            seq: 1

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