Created question in FIWARE Q/A platform on 29-08-2019 at 15:08
Please, ANSWER this question AT https://stackoverflow.com/questions/57711025/sending-commands-to-devices-in-fiware-orion-is-not-working

Question:
Sending commands to devices in FIWARE Orion is not working

Description:
I am trying to provide a device on FIWARE and send commands. In my case, a lamp with commands ("on" and "off"). But, it's not working.
The steps to create a device and send command are:

Provide a device;
Create a service group;
Create a registration with commands;
Send a command.

I'm taking the fiware-tutorials following the steps, but don't work.

The code I have used was:

To create a device:

curl -iX POST \
'http://localhost:4041/iot/devices' \
-H 'Content-Type: application/json' \
-H 'fiware-service: openiot' \
-H 'fiware-servicepath: /' \
-d '{
"devices": [
{
"device_id": "lamp1",
"entity_name": "urn:ngsi-ld:Lamp:1",
"entity_type": "Lamp",
"protocol": "PDI-IoTA-UltraLight",
"transport": "HTTP",
"endpoint": "http://iot-sensors:3001/iot/lamp1",
"commands": [

{"name": "on","type": "command"}

,

{"name": "off","type": "command"}

],
"attributes": [

{"object_id": "s", "name": "state", "type":"Text"}

,

{"object_id": "l", "name": "luminosity", "type":"Integer"}

],
"static_attributes": [

{"name":"refStore", "type": "Relationship","value": "urn:ngsi-ld:Store:001"}

]
}
]
}
'

To create a service group:

curl -iX POST \
'http://localhost:4041/iot/services' \
-H 'Content-Type: application/json' \
-H 'fiware-service: openiot' \
-H 'fiware-servicepath: /' \
-d '{
"services": [

{ "apikey": "4jggokgpepnvsb2uv4s40d59ov", "cbroker": "http://orion:1026", "entity_type": "Thing", "resource": "/iot/d" }

]
}'

To create a registration for commands:

curl -iX POST \
'http://localhost:1026/v2/registrations' \
-H 'Content-Type: application/json' \
-H 'fiware-service: openiot' \
-H 'fiware-servicepath: /' \
-d '{
"description": "Lamp Commands",
"dataProvided": {
"entities": [

{ "id": "urn:ngsi-ld:Lamp:1","type": "Lamp" }

],
"attrs": [ "on", "off" ]
},
"provider": {
"http":

{"url": "http://orion:1026/v2"}

,
"legacyForwarding": true
}
}'

To send a "on" command:

curl -iX PATCH \
'http://localhost:1026/v2/entities/urn:ngsi-ld:Lamp:1/attrs' \
-H 'Content-Type: application/json' \
-H 'fiware-service: openiot' \
-H 'fiware-servicepath: /' \
-d '{
"on":

{ "type" : "command", "value" : "" }

}'

Doing a HTTP get request to retrieve the entity:

curl -G -X GET \
'http://localhost:1026/v2/entities/urn:ngsi-ld:Lamp:1' \
-d 'type=Lamp' \
-d 'options=keyValues' \
-H 'fiware-service: openiot' \
-H 'fiware-servicepath: /'

I expect a output like:

{ "id": "urn:ngsi-ld:Lamp:001", "type": "Lamp", "TimeInstant": "2019-08-28T13:33:51.00Z", "luminosity": "1115", "off_info": " ", "off_status": "UNKNOWN", "on_info": " on OK", "on_status": "OK", "refStore": "urn:ngsi-ld:Store:001", "state": "ON", "on": "", "off": "" }

but I receive this:

{ "id": "urn:ngsi-ld:Lamp:1", "type": "Lamp", "TimeInstant": "2019-08-28T12:50:22.00Z", "luminosity": " ", "off_info": " ", "off_status": "UNKNOWN", "on_info": "There was an error in the response of a device to a command [404]: on NOT OK", "on_status": "ERROR", "refStore": "urn:ngsi-ld:Store:001", "state": " ", "on": "", "off": "" }