Queries the shadow information of a specified device.

Limits

Each Alibaba Cloud account can run a maximum of 500 queries per second (QPS).

Note RAM users of an Alibaba Cloud account share the quota of the account.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes GetDeviceShadow

The operation that you want to perform. Set the value to GetDeviceShadow.
DeviceName String Yes device1

The name of the device.
ProductKey String Yes a1T27vz****

The key of the product to which the device belongs.
IotInstanceId String No iot_instc_pu****_c*-v64********

The ID of the instance. This parameter is not required for public instances. However, the parameter is required for the instances that you have purchased.

In addition to the preceding operation-specific request parameters, you must specify common request parameters when you call this API operation. For more information about common request parameters, see Common request parameters.

Response parameters

Parameter Type Example Description
Code String iot.system.SystemException

The error code returned if the call fails. For more information, see Error codes.

ErrorMessage String A system exception occurred.

The error message returned if the call fails.
RequestId String A56E345A-0978-4993-ACBA-3EF444ED187F

The globally unique identifier that Alibaba Cloud generated for the request.
ShadowMessage String {"method":"update","state":{"desired":{"color":"green"}},"version":1}

The shadow information returned if the call is successful.

Note The structure of the shadow information varies based on the status of the device. For more information, seeConfigure device shadows.
Success Boolean true

Indicates whether the call was successful.

  • true: The call was successful.
  • false: The call failed.

Examples

Sample requests

https://iot.cn-shanghai.aliyuncs.com/?Action=GetDeviceShadow
&ProductKey=a1T27vz****
&DeviceName=device1
&<Common request parameters>

Sample success responses

XML format 

<GetDeviceShadowResponse>
        <RequestId>BB71E443-4447-4024-A000-EDE09922891E</RequestId>
        <Success>true</Success>
        <ShadowMessage>{"method":"update","state":{"desired":{"color":"green"},"reported":"\"},"version":1}</ShadowMessage>
  </GetDeviceShadowResponse>

JSON format 

{
    "ShadowMessage": {"method":"update","state":{"desired":{"color":"green"}},"version":1},
    "RequestId": "A56E345A-0978-4993-ACBA-3EF444ED187F",
    "Success": true
}

Error codes

For a list of error codes, visit the API Error Center.