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

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 '

'
curl -X POST -H "Content-Type: application/json" -H "Accept:
application/json" -H "Fiware-Service: myHome" -H "Fiware-ServicePath:
/environment" -d '{
"entities": [

]
}' 'http://localhost:1026/NGSI10/queryContext'

the resulting response is empty

{
"contextResponses" : [
{
"contextElement" : {
"type" : "multiSensor",
"isPattern" : "false",
"id" : "LivingRoomSensor",
"attributes" : [

,

]
},
"statusCode" :

}
]
}

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

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[Created via e-mail received from: Stefano Valtolina <valtolin@di.unimi.it>]