Pushing Batch Device Data Change Notifications

Typical Scenario

After an NA subscribes to batch device data change notifications (the notification type is deviceDatasChanged) on the IoT platform, the IoT platform sends a notification message to the NA when the device reports data of multiple service attributes.

API Function

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

Note

When Subscribing to Service Data of the IoT Platform, an NA must subscribe to the specified callback address in the API description. The server and port in the callback address are the public IP address and specified port of the NA server.
An NA receives the content of a push message by inheriting the PushMessageReceiver class and rewriting the callback API.
If the callback address is not the address of the NA, the NA must implement the original callback API. For details on the API content, see Message Push in the Huawei IoT Platform Northbound API Reference.

API Description

Callback URL	https://server:port/v1.0.0/messageReceiver
Callback API	def handleDeviceDatasChanged(self)
Class	PushMessageReceiver

Parameter Description

The input parameter is request.json.

Parameter	Mandatory or Optional	Type	Location	Description
nddscDTO	Mandatory	NotifyDeviceDatasChangedDTO	body	For details, see NotifyDeviceDatasChangedDTO structure.

NotifyDeviceDatasChangedDTO structure

Parameter	Mandatory or Optional	Type	Location	Description
notifyType	Mandatory	String	body	Indicates the notification type. The value is deviceDatasChanged.
requestId	Mandatory	String	body	Indicates the sequence number of the message, which uniquely identifies the message.
deviceId	Mandatory	String	body	Uniquely identifies a device.
gatewayId	Mandatory	String	body	Uniquely identifies a gateway.
services	Mandatory	List<DeviceService>	body	Indicates a service list. For details, see DeviceService structure.

DeviceService 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 is reported in the format of yyyyMMddTHHmmssZ, for example, 20151212T121212Z.

Response Parameters

Status Code: 200 OK

Request Example

Method: POST
request: {callbackUrl}
Header:
Content-Type:application/json
Body:
{
    "notifyType":"deviceDatasChanged",
    "requestId":"*************",
    "deviceId":"********************************",
    "gatewayId":"*************",
    "service":[
        {
            "serviceId":"Brightness",
            "serviceType":"Brightness",
            "data":{
                "brightness":80
            },
            "eventTime":"20170311T163657Z"
        },
        {
            "serviceId":"Color",
            "serviceType":"Color",
            "data":{
                "value":"red"
            },
            "eventTime":"20170311T163657Z"
        }
    ]
}