Pushing Device Data Change Notifications

Typical Scenario

After an NA subscribes to device data change notifications (the notification type is deviceDataChanged) on the IoT platform, the IoT platform sends a notification message to the NA when the device reports data of a single service attribute.

API Function

This API is used by the IoT platform to push notification messages to an NA that has subscribed to device data change notifications.

Note

The NA must return a response code after receiving a message pushed by the IoT platform.

API Prototype

Method	POST
URL	The URL is determined by callbackUrl in the subscription request sent by the NA.
Transport Protocol	HTTPS/HTTP

Request Parameters

Parameter	Mandatory or Optional	Type	Location	Description
notifyType	Mandatory	String	body	Indicates the notification type. The value is deviceDataChanged.
requestId	Optional	String(1-128)	body	Indicates the sequence number of the message, which uniquely identifies the message.
deviceId	Mandatory	String	body	Uniquely identifies a device. The value of this parameter is allocated by the IoT platform during device registration.
gatewayId	Mandatory	String	body	Identifies a gateway. The gateway ID is the same as the device ID if the device is a directly connected device. If the device is an indirectly connected device, the gateway ID is the device ID of the directly connected device (that is, the gateway) with which it associates.
service	Mandatory	DeviceServiceData	body	Indicates service data of the device. For details, see DeviceServiceData structure.

DeviceServiceData structure

Parameter	Mandatory or Optional	Type	Location	Description
serviceId	Mandatory	String	body	Identifies a service.
serviceType	Mandatory	String	body	Indicates the service type.
data	Mandatory	ObjectNode	body	Indicates service data information.
eventTime	Mandatory	String	body	Indicates the time when an event occurs. The value is in the format of yyyymmddThhmmssZ. An example value is 20151212T121212Z.

Response Parameters

Status Code: 200 OK

Request Example

Method: POST
Request: {callbackUrl}
Header:
Content-Type: application/json
Body:
{
  "notifyType": "deviceDataChanged",
  "requestId": "*************",
  "deviceId": "********************************",
  "gatewayId": "*************",
  "service": {
    "serviceId": "Brightness",
    "serviceType": "Brightness",
    "data": {
      "brightness": 80
    },
    "eventTime": "20170311T163657Z"
  }
}