[Fiware-lab-help] iotagent-json

[Stefano Valtolina]

Dear Daniel,
my name is Stefano Valtolina and I work at the Department of Computer 
Science of the University of Milano.
I'm writing you because  we are trying to implement an IOTarchitecture 
by using Orion and the IoTAgent but we have some problems.
We followed the instruction reported at this link:
https://github.com/telefonicaid/iotagent-json/blob/master/docs/stepbystep.md

We installed:
- mosquitto MQTT v3.1 broker.
- Orion - FIWARE NGSI version 2 API.
- Node.js v.6.11.0
- MongoDB v2.4.14

if i call the command
curl http://localhost:4041/iot/about
I have
{"libVersion":"2.4.0-next","port":4041,"baseRoot":"/","version":"1.5.0-next"}

When we try to provision the device (e.g the sensor01 as reported in the 
example) we don't have any messages of error but the final registration 
in Orion does not seem to be successful.
This because after the execution of  following two commands:

mosquitto_pub -t /1234/sensor01/attrs -m '{"l":4,"t": "31.5"}'
curl -X POST -H "Content-Type: application/json" -H "Accept: 
application/json" -H "Fiware-Service: myHome" -H "Fiware-ServicePath: 
/environment" -d '{
     "entities": [
         {
             "isPattern": "false",
             "id": "LivingRoomSensor",
             "type": "multiSensor"
         }
     ]
}' 'http://localhost:1026/NGSI10/queryContext'

the resulting response is empty

{
   "contextResponses" : [
     {
       "contextElement" : {
         "type" : "multiSensor",
         "isPattern" : "false",
         "id" : "LivingRoomSensor",
         "attributes" : [
           {
             "name" : "Luminosity",
             "type" : "lumens",
             "value" : ""
           },
           {
             "name" : "Temperature",
             "type" : "celsius",
             "value" : ""
           }
         ]
       },
       "statusCode" : {
         "code" : "200",
         "reasonPhrase" : "OK"
       }
     }
   ]
}

and in Orion the new device does not appear.
Please could you give us some indication of where we're going wrong.?
Sorry for bothering you  but we are not very familiar about this type of 
iot architecture and any suggestions can be very useful.
Best regards
Stefano




______________
Stefano Valtolina, Ph.D.
Assistant Professor
Department of Computer Science - Università degli Studi di Milano
MIPS Lab - Multimedia, Interaction, Perception and Society