Querying Information About a Device

Typical Scenario

If an NA needs to view detailed information (such as the manufacturer, model, version, status, and service attributes) of a device that has been registered on the IoT platform, the NA can call this API to obtain the information.

API Function

This API is used by an NA to query detailed information of a specified device based on the device ID on the IoT platform, such as configuration, status and service attributes.

API Description

1	QuerySingleDeviceInfoOutDTO querySingleDeviceInfo(String deviceId, String select, String appId, String accessToken) throws NorthApiException

Parameter Description

Parameter	Mandatory or Optional	Type	Location	Description
deviceId	Mandatory	String	path	Identifies a device. The device ID is allocated by the IoT platform during device registration.
select	Optional	String	query	Indicates the query condition. The value can be IMSI.
appId	Mandatory	String	query	If the device belongs to the current application, set this parameter to null. Otherwise, set this parameter to the ID of the authorized application.
accessToken	Mandatory	String	header	If the Periodically Refreshing a Token API is called, set this parameter to null. Otherwise, set this parameter to the accessToken obtained by the Authentication API.

Response Parameters

QuerySingleDeviceInfoOutDTO structure

Parameter	Type	Description
deviceId	String(256)	Identifies a device.
gatewayId	String(256)	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 a non-directly connected device, the gateway ID is the device ID of the directly connected device (that is, the gateway) with which it associates.
nodeType	Enum	Indicates the node type. The value options are ENDPOINT, GATEWAY, and UNKNOW.
createTime	String(256)	Indicates the time when the device is created. The value is in the format of yyyyMMdd'T'HHmmss'Z'. An example value is 20151212T121212Z.
lastModifiedTime	String(256)	Indicates the last time when the device is modified.
deviceInfo	DeviceInfo	Indicates information about the device. For details, see DeviceInfo structure.
services	List<DeviceService>	Indicates the device service list. For details, see DeviceService structure.

DeviceInfo structure

Parameter	Type	Description
nodeId	String(256)	Identifies a device.
name	String(256)	Indicates the device name.
description	String(2048)	Indicates the device description.
manufacturerId	String(256)	Uniquely identifies a manufacturer.
manufacturerName	String(256)	Indicates the manufacturer name.
mac	String(256)	Indicates the MAC address of the device.
location	String(2048)	Indicates the device location.
deviceType	String(256)	Indicates the device type. The upper camel case is used, for example, MultiSensor, ContactSensor, and CameraGateway.
model	String(256)	Indicates the device model. In Z-Wave, the format is productType + productId. The value is a hexadecimal value in the format of XXXX-XXXX. Zeros are added if required, for example, 001A-0A12. The format in other protocols is still to be determined.
swVersion	String(256)	Indicates the software version of the device. In Z-Wave, the format is major version.minor version, for example, 1.1.
fwVersion	String(256)	Indicates the firmware version of the device.
hwVersion	String(256)	Indicates the hardware version of the device.
protocolType	String(256)	Indicates the protocol type used by the device. The value options are CoAP, huaweiM2M, Z-Wave, ONVIF, WPS, Hue, WiFi, J808, Gateway, ZigBee, and LWM2M.
bridgeId	String(256)	Identifies the bridge through which the device accesses the IoT platform.
status	String	Indicates whether the device is online. The value options are ONLINE, OFFLINE, and ABNORMAL.
statusDetail	String(256)	Indicates the device status details. The value of this parameter varies with the value of status. For details, see status and statusDetail structure.
mute	String	Indicates whether the device is in the frozen state. Based on the value of this parameter, the IoT platform determines whether to manage and store data reported by the device. TRUE: The device is in the frozen state. FALSE: The device is not in the frozen state.
supportedSecurity	String	Indicates whether the security mode is supported. TRUE: The security mode is supported. FALSE: The security mode is not supported.
isSecurity	String	Indicates whether the security mode is enabled. TRUE: The security mode is enabled. FALSE: The security mode is disabled.
signalStrength	String(256)	Indicates the signal strength of the device.
sigVersion	String(256)	Indicates the SIG version of the device.
serialNumber	String(256)	Indicates the serial number of the device.
batteryLevel	String(256)	Indicates the battery level of the device.

status and statusDetail

status	statusDetail
OFFLINE	NONE CONFIGURATION_PENDING
ONLINE	NONE COMMUNICATION_ERROR CONFIGURATION_ERROR BRIDGE_OFFLINE FIRMWARE_UPDATING DUTY_CYCLE NOT_ACTIVE

NOTE:

When the device status information is reported to the IoT platform, status and statusDetail must be included. It is recommended that statusDetail be used only for display but not for logical judgment.

DeviceService structure

Parameter	Type	Description
serviceId	String(256)	Identifies a service.
serviceType	String(256)	Indicates the service type.
serviceInfo	ServiceInfo	Indicates the masked device service information. For details, see ServiceInfo structure.
data	ObjectNode(2097152)	Indicates an attribute-value pair (AVP).
eventTime	String(256)	The value is in the format of yyyyMMdd'T'HHmmss'Z'. An example value is 20151212T121212Z.

ServiceInfo structure

Parameter	Type	Description
muteCmds	List<String>	Indicates the device command list.

Error Codes

HTTP Status Code	Error Codes	Error Description	Remarks
400	100405	The request parameter is invalid.	The request message contains invalid parameters. Recommended handling: Check whether parameters in the API request are correct by referring to the request parameter description.
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.
404	100403	The device is not existed.	The device does not exist. Recommended handling: Check whether deviceId is correct.
404	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.
500	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.
500	50252	Internal server error.	An internal server error occurs. Recommended handling: An internal error occurs on the IoT platform. Contact IoT platform maintenance personnel.