在FIWARE Orion中向設備發送命令無效

Question

我正在嘗試在FIWARE上提供設備並發送命令。 就我而言，是帶有命令（“開”和“關”）的燈。 但是，它不起作用。 創建設備和發送命令的步驟是：

1. 提供設備；
2. 創建服務組；
3. 使用命令創建注冊；
4. 發送命令。

我服用fiware-教程下面的步驟，但不起作用。

我使用的代碼是：

要創建設備：

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"}
      ]
    }
  ]
}
'

要創建服務組：

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"
   }
 ]
}'

要為命令創建注冊：

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
  }
}'

發送“ on”命令：

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" : ""
  }
}'

進行HTTP get請求以檢索實體：

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: /'

我期望輸出如下：

{
  "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": ""
}

但我收到這個：

{
  "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": ""
}

Answer 1

假設您使用的是FIWARE教程虛擬設備，則您的設置步驟正確，並且收到的錯誤消息（ 404 ）表示lamp1發送時未響應您的命令。

設置設備時

 "device_id": "lamp1",
 "entity_name": "urn:ngsi-ld:Lamp:1",
 "endpoint": "http://iot-sensors:3001/iot/lamp1",

您正在聲明：

• 存在設備（ lamp1 ）
• 設備在Orion中具有實體名稱（ urn:ngsi-ld:Lamp:1 ）
• 設備能夠響應顯示的URL上的命令（ http://iot-sensors:3001/iot/lamp1 ）

最后的陳述是不正確的。

上下文提供者代碼設置了4個虛擬燈：

• lamp001
• lamp002
• lamp003
• lamp004

但是沒有lamp1因此，當HTTP POST請求發送到http://iot-sensors:3001/iot/lamp1 ，響應為404 Not http://iot-sensors:3001/iot/lamp1 未正確定義在Orion的實體狀態中。

順便說一句，@ fgalan完全正確地指出，對於較新版本的IoT Agents，不再需要注冊-在本教程中保留該注冊純粹是為了與舊版本向后兼容。