ContextBroker Node not created

[karikolehmainen]

Installing the latest component to with latest NodeRED seems not create ContextBroker node. Only Nodes visible are NGSI Entity, NGSI Dataset, NGSI Update, NGSI Subscription and NGSI v2toLD. ContextBroker is referred in details of NGSI Subscription but such entity is not visible on design view. It is possible to set ContextBroker settings via Subscription node, but deploying Subscription node does not make subscription to Orion so I am thinking that ContextBorker node actually does not get deployed. Any idea what could be wrong, is there something in latest NodeRED that brakes compatibility and if so, what is the latest compatible versions?

[fisuda]

According to the following source code, the Context-Broker node is defined as a configuration node. Please see https://nodered.org/docs/creating-nodes/config-nodes.

node-red-contrib-FIWARE_official/src/nodes/NGSI/contextbroker/contextbroker.html

Lines 20 to 25 in 14271fb

	};
	RED.nodes.registerType('Context-Broker',{
	category: 'config',
	defaults: {

[karikolehmainen]

Thanks for the reply, that explains why it is not visible. Still I am struggling to understand how to get context change events to NodeRED. I do not seem to be able to get any subscriptions registered at Orion nor do I see any traffic at debug view I deploy the flow. I have defined NGSI Subscribe Node as follows:


This is an example of an entity I have at Orion:
`
{

    "id": "urn:ngsi-ld:NodeSensor:nodeC8-B3-C6-C5-92-B1",
    "type": "NodeSensor",
    "TimeInstant": { "type": "DateTime", "value": "2021-04-29T08:57:43.312Z", "metadata": {}  },
    "humidity": {
        "type": "Number",
        "value": 187,
        "metadata": { "TimeInstant": { "type": "DateTime", "value": "2021-04-29T08:57:43.312Z"  }  }
    },
    "refHome": {
        "type": "Relationship",
        "value": "urn:ngsi-ld:Refinery:001",
        "metadata": { "TimeInstant": { "type": "DateTime", "value": "2021-04-29T08:57:43.312Z"  }  }
    },
    "signal": {
        "type": "Number",
        "value": -44,
        "metadata": {  "TimeInstant": {  "type": "DateTime", "value": "2021-04-29T08:57:43.312Z"  }  }
    },
    "temperature": {
        "type": "Number",
        "value": 206,
        "metadata": {  "TimeInstant": { "type": "DateTime",  "value": "2021-04-29T08:57:43.312Z"   }  }
    }
}`

That was retrieved with command:
curl -X GET 'http://localhost:1026/v2/entities' -H 'fiware-service: openiot' -H 'fiware-servicepath: /' | python3 -mjson.tool

Note that entities are NGSI v2 but entity IDs are given with NGSI-LD notation as per FIWARE examples.

[kosgobakis]

Check my pull request. The issue is that you need to add the fiware-servicepath when you declare the Context Broker
https://github.com/FIWARE/node-red-contrib-FIWARE_official/pull/20

[jason-fox]

The PR has been merged - does this solve the issue?

[johncaipa]

It has not worked for me, it only works with security enabled?


My example flow:
[{"id":"e2524373.a31728","type":"NGSI-Entity","z":"f6f2187d.f17ca8","name":"","endpoint":"68a1e9ee.287918","protocol":"v2","ldContext":"https://uri.etsi.org/ngsi-ld/v1/ngsi-ld-core-context.jsonld","mode":"keyValues","mimeType":"application/ld+json","attrs":"","x":490,"y":240,"wires":[["6e92558d.758ed4"]]},{"id":"94a57f7a.74bbf","type":"inject","z":"f6f2187d.f17ca8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"urn:ngsi-ld:Store:001","payloadType":"str","x":270,"y":240,"wires":[["e2524373.a31728"]]},{"id":"6e92558d.758ed4","type":"debug","z":"f6f2187d.f17ca8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":680,"y":240,"wires":[]},{"id":"68a1e9ee.287918","type":"Context-Broker","name":"","endpoint":"http://localhost:1026","service":"openiot","servicepath":"/","idmEndpoint":""}]
on postman the test are working