Creating Device Command Revocation Tasks

Typical Scenario

After an NA delivers commands to a device, the IoT platform does not deliver the commands to the device for execution (the commands are in the DEFAULT state) if the commands are in queue or the device is offline. In this case, the NA can call this API to revoke all the undelivered commands of a specified device. Commands that have been delivered cannot be revoked.

API Function

This API is used by an NA to create a command revocation task to revoke all undelivered commands (that is, commands in the DEFAULT state) with the specified device ID on the IoT platform.

API Description

1	public function createDeviceCmdCancelTask($cdcctInDTO, $appId, $accessToken)

Parameter Description

Parameter	Mandatory or Optional	Location	Description
$cdcctInDTO	Mandatory	body	For details, see CreateDeviceCmdCancelTaskInDTO structure.
$appId	Mandatory	query	If the command belongs to the current application, set this parameter to null. Otherwise, set this parameter to the ID of the authorized application.
$accessToken	Mandatory	header	This parameter is set to the value of the access token obtained by calling the Authentication API.

CreateDeviceCmdCancelTaskInDTO

Parameter	Mandatory or Optional	Location	Description
$deviceId	Mandatory	body	Identifies the device whose commands are to be revoked. The revocation task will revoke all commands delivered to this device.

Response Parameters

CreateDeviceCmdCancelTaskOutDTO

Parameter	Description
$taskId	Identifies a command revocation task.
$appId	Identifies the application to which the command revocation task belongs.
$deviceId	Identifies the device whose commands are to be revoked by the revocation task.
$status	Indicates the status of the command revocation task. WAITING: The task is waiting to be executed. RUNNING: The task is being executed. SUCCESS: The task has been successfully executed. FAILED: The task fails to be executed. PART_SUCCESS: Task execution partially succeeds.
$totalCount	Indicates the total number of revoked commands.
$deviceCommands	Indicates the revoked device command list. For details, see DeviceCommandRespV4 structure.

DeviceCommandRespV4 structure

Parameter	Description
$commandId	Identifies a device command.
$appId	Uniquely identifies an NA. This parameter is used to identify an NA that can call open APIs provided by the IoT platform.
$deviceId	Uniquely identifies the device to which the command is delivered.
$command	Indicates information about the delivered command. For details, see CommandDTOV4 structure.
$callbackUrl	Indicates the URL for receiving command status change notifications. When the command status changes, such as execution failure, execution success, timeout, sending, or sent, the NA is notified.
$expireTime	Indicates the command expiration time, in units of seconds. The command will not be delivered after the specified time elapses. The default validity period is 48 hours (86400 seconds x 2).
$status	Indicates the status of the command. DEFAULT: The command has not been delivered. EXPIRED: The command has expired. SUCCESSFUL: The command has been successfully executed. FAILED: The command fails to be executed. TIMEOUT: Command execution times out. CANCELED: The command has been canceled.
$result	Indicates the detailed command execution result.
$creationTime	Indicates the time when the command is created.
$executeTime	Indicates the time when the command is executed.
$platformIssuedTime	Indicates the time when the IoT platform sends the command.
$deliveredTime	Indicates the time when the command is delivered.
$issuedTimes	Indicates the number of times the IoT platform delivers the command.
$maxRetransmit	Indicates the maximum number of times the command can be retransmitted.

CommandDTOV4 structure

Parameter	Mandatory or Optional	Description
$serviceId	Mandatory	Identifies the service corresponding to the command.
$method	Mandatory	Indicates the command name.
$paras	Optional	Indicates a JSON string of command parameters. The specific format is negotiated by the NA and the device.

Error Codes

HTTP Status Code	Error Code	Error Description	Remarks
200	100203	The application is not existed.	The application does not exist. Recommended handling: Check whether appId carried in the HTTP request header is correct. Check whether appId in the request path (URL) is correct.
200	100217	The application hasn't been authorized.	The application has not been authorized. Recommended handling: In scenarios where applications are not authorized, ensure that request parameter appId is null.
200	100418	The deviceData is not existed.	The device data does not exist. Recommended handling: If deviceId carried in the request is incorrect, check whether deviceId belongs to appId or whether deviceId is incorrect. Check whether appId carried in the header contains deviceId. If the URL contains the optional parameter appId, check whether the value of appId is correct.
400	100022	The input is invalid.	An input parameter is invalid. Recommended handling: Check whether parameters carried in the API call request are valid.
403	100203	The application is not existed.	The application does not exist. Recommended handling: Check whether appId carried in the HTTP request header is correct. Check whether appId in the request path (URL) is correct.
403	100217	The application hasn't been authorized.	The application has not been authorized. Recommended handling: In scenarios where applications are not authorized, ensure that request parameter appId is null.
403	1010009	app throttle exceed.	The NA calls the API at a frequency that exceeds the flow control threshold (100 calls per minute by default). Recommended handling: Contact IoT platform maintenance personnel to adjust the flow control threshold or control the API call frequency.
403	1010005	App_key or access_token is invalid.	The access token is invalid. Recommended handling: Check whether accessToken carried in the API request is correct.
500	100001	Internal server error.	An internal server error occurs. Recommended handling: An internal error occurs on the IoT platform. Contact IoT platform maintenance personnel.
500	100220	Get AppKey from header failed.	Failed to obtain the appKey. Recommended handling: Check whether appId is carried in the API request header.
503	100501	Congestion occurs, and the current network has been flow-controlled	Congestion occurs. The current network is under flow control.