Orion CB: Can't Access Entities via /v2/entities endpoint - fiware

Question

While creating a wirecloud wiring using NGSI Source operator, I encountered an error (helpless error) for couple of days, regarding connection to my instance of Orion CB. I can confirm all other NGSI operator settings entered are correct.
Error creating subscription in the context broker server: Connection Error
I however, suspect this error has to do with Orion NOT finding the entities to subscribe the NGSI Source operator. This is because I tried accessing Eindhoven's broker (http://212.159.228.70:1026/) and it works, NGSI Source operator subscription created successfully.
Equally, I get all entities/attributes in the Eindhoven's broker using:
Akil$http http://212.159.228.70:1026/v2/entities
HTTP/1.1 200 OK
Connection: Keep-Alive
Content-Length: 15501
Content-Type: application/json
Date: Mon, 13 May 2019 10:20:20 GMT
Fiware-Correlator: b5e5294a-7568-11e9-83c8-0242ac120003
[
{
"NO2": {
"metadata": {},
"type": "Number",
"value": 27.5
},
"Ozon": {
"metadata": {},
"type": "Number",
"value": 59.5
},
"PM1": {
"metadata": {},
"type": "Number",
"value": 8
},
"PM10": {
"metadata": {},
"type": "Number",
"value": 12
},
.
.
}
]
But then I cannot get the entities in my Orion instance using same scenario:
Akil$ http 193.136.xx.xx:53154/v2/entities
HTTP/1.1 200 OK
Connection: Keep-Alive
Content-Length: 2
Content-Type: application/json
Date: Mon, 13 May 2019 10:36:13 GMT
Fiware-Correlator: ee22e4b2-756a-11e9-afa1-0242ac160007
[]
Return empty list, whereas I have available 2 FIWARE services: environment and urbansense. The entities I want to access are available with the urbansense fiware-service having /basic fiware-servicepath.
Service health:
Akil$ http 193.136.xx.xx:53154/version
HTTP/1.1 200 OK
Connection: Keep-Alive
Content-Length: 345
Content-Type: application/json
Date: Mon, 13 May 2019 10:50:13 GMT
Fiware-Correlator: e32bf3da-756c-11e9-9371-0242ac160007
{
"orion": {
"compile_time": "Tue Feb 12 10:51:10 UTC 2019",
"compiled_by": "root",
"compiled_in": "4f8128ac7b5b",
"doc": "https://fiware-orion.rtfd.io/",
"git_hash": "7ae8c69b97cd875236b952322a6bd503debbd13d",
"release_date": "Tue Feb 12 10:51:10 UTC 2019",
"uptime": "6 d, 18 h, 7 m, 6 s",
"version": "2.1.0-next"
}
}
Questions:
Why can't I access my Orion instance same way I accessed Eindhoven's
broker?
Is this the reason why my wiring for NGSI Source operator
failed, thus reporting subscription error above?

Answer 1

I'm not sure of fully understading your case (specially the relationship with Wirecloud, as I'm not an expert in Wirecloud), but let's try to answer... :)
From:
[GET /v2/entities] Return empty list, whereas I have available 2 FIWARE services: environment and urbansense. The entities I want to access are available with the urbansense fiware-service having /basic fiware-servicepath.
If the entities you want to access are available in a given service and subservice, then you should add then to the GET request. I don't know how the http command works, but if it were curl it would be something like this
curl -H 'fiware-service: environment' and -H 'fiware-servicepath: /basic' http://212.159.228.70:1026/v2/entities