Query the Device List

Function

This API is used by an application to query the device list on the IoT platform.

Debugging

You can debug this API through automatic authentication in API Explorer or use the SDK sample code generated by API Explorer.

URI

GET /v5/iot/{project_id}/devices

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Parameter description: project ID. For details about how to obtain the project ID, see Obtaining a Project ID.

**Table 2** Query Parameters
Parameter	Mandatory	Type	Description
product_id	No	String	Parameter description: unique ID of the product associated with the device. The value is allocated by the platform after the product is created. For details, see Creating a Product. Value: The value can contain a maximum of 36 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed.
gateway_id	No	String	Parameter description: gateway ID, which is the device ID of the parent device. If this parameter is carried, child devices under the parent device are queried. By default, the child devices at the nearest lower level are queried. To query all levels of child devices, set is_cascade_query to true. If this parameter is not carried, all your devices are queried. Value: The value can contain a maximum of 128 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed.
is_cascade_query	No	Boolean	Parameter description: whether cascading query is performed. This parameter is valid only when gateway_id is carried. The default value is false. Options: true: All child devices under the device whose ID is the value of gateway_id are queried. false: The child devices at the nearest lower level under the device whose ID is the value of gateway_id are queried.
node_id	No	String	Parameter description: device identifier. This parameter is set to the IMEI, MAC address, or serial number. Value: The value can contain a maximum of 64 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed.
device_name	No	String	Parameter description: device name, which uniquely identifies a device in a resource space. Value: The value can contain a maximum of 256 characters. Only letters, digits, and special characters (_?'#().,&%@!-) are allowed.
limit	No	Integer	Parameter description: number of records to display on each page. Value: The value is an integer ranging from 1 to 50. The default value is 10.
marker	No	String	Parameter description: ID of the last record in the previous query. The value is returned by the platform during the previous query. Records are queried in descending order of record IDs (the marker value). A newer record will have a larger ID. If marker is specified, only the records whose IDs are smaller than marker are queried. If marker is not specified, the query starts from the record with the largest ID, that is, the latest record. If all data needs to be queried in sequence, this parameter must be filled with the value of marker returned in the last query response each time. Value: The value is a string of 24 hexadecimal characters. The default value is ffffffffffffffffffffffff.
offset	No	Integer	Parameter description: If offset is set to N, the query starts from the N+1 record after the last record in the previous query. The value is an integer ranging from 0 to 500. The default value is 0. If offset is set to 0, the output starts from the first record after the last record in the previous query. To ensure API performance, you can use this parameter together with marker to turn pages. For example, if there are 50 records on each page, you can directly specify offset to jump to the specified page within page 1 and 11. If you want to view records displayed on pages 12 to 22, you need to use the marker value returned on page 11 as the marker value for the next query. Value: The value is an integer ranging from 0 to 500. The default value is 0.
start_time	No	String	Parameter description: Records of devices registered after the value of this parameter are queried. The value is in the format of yyyyMMdd'T'HHmmss'Z', for example, 20151212T121212Z.
end_time	No	String	Parameter description: Records of devices registered before the value of this parameter are queried. The value is in the format of yyyyMMdd'T'HHmmss'Z', for example, 20151212T121212Z.
app_id	No	String	Parameter description: resource space ID. This parameter is optional. If you have multiple resource spaces, you can specify this parameter to query devices in the specified resource space. If this parameter is not carried, devices in all resource spaces are queried. Value: The value can contain a maximum of 36 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed.

Request Parameters

**Table 3** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	No	String	Parameter description: user token. You can obtain the token by calling the IAM API Obtaining a User Token Through Password Authentication. X-Subject-Token in the response header returned by the API is the desired user token. For details about how to obtain the token, see Token Authentication.
Instance-Id	No	String	Parameter description: instance ID. Unique identifier of each instance in the physical multi-tenant scenario. Mandatory for professional editions and recommended in other cases. Log in to the IoTDA console and choose Overview in the navigation pane to view the instance ID. For details, see Viewing Instance Details.

Response Parameters

Status code: 200

**Table 4** Response body parameters
Parameter	Type	Description
devices	Array of QueryDeviceSimplify objects	Device information list.
page	Page object	Pagination information of the query results.

**Table 5** QueryDeviceSimplify
Parameter	Type	Description
app_id	String	Resource space ID.
app_name	String	Resource space name.
device_id	String	Device ID, used to uniquely identify a device. The value of this parameter is specified during device registration or allocated by the platform. If the value is allocated by the platform, the value is in the format of [product_id]_[node_id].
node_id	String	Device identifier. This parameter is set to the IMEI, MAC address, or serial number.
gateway_id	String	Gateway ID, which is the device ID of the parent device. 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 with which it associates.
device_name	String	Device name.
node_type	String	Device node type. ENDPOINT: an indirectly connected device. GATEWAY: a directly connected device or gateway. UNKNOWN: The device node type is unknown.
description	String	Device description.
fw_version	String	Firmware version of the device.
sw_version	String	Software version of the device.
device_sdk_version	String	Device SDK information.
product_id	String	Unique ID of the product associated with the device.
product_name	String	Name of the product associated with the device.
status	String	Device status. ONLINE: The device is online. OFFLINE: The device is offline. ABNORMAL: The device is abnormal. INACTIVE: The device is not activated. FROZEN: The device is frozen.
tags	Array of TagV5DTO objects	List of device tags.

**Table 6** TagV5DTO
Parameter	Type	Description
tag_key	String	Parameter description: tag key, which is unique for a resource. If the specified key already exists, the value of the existing tag is overwritten. If the specified key does not exist, a new tag is added. Value: The value can contain a maximum of 64 characters. Only letters, digits, underscores (_), periods (.), and hyphens (-) are allowed.
tag_value	String	Parameter description: tag value. Value: The value can contain a maximum of 128 characters. Only letters, digits, underscores (_), periods (.), and hyphens (-) are allowed.

**Table 7** Page
Parameter	Type	Description
count	Long	Total number of records that meet the query conditions.
marker	String	ID of the last record in this query, which can be used in the next query.

Example Requests

Queries all devices in a list.

GET https://{endpoint}/v5/iot/{project_id}/devices

Example Responses

Status code: 200

{
  "devices" : [ {
    "app_id" : "jeQDJQZltU8iKgFFoW060F5SGZka",
    "app_name" : "testAPP01",
    "device_id" : "d4922d8a-6c8e-4396-852c-164aefa6638f",
    "node_id" : "ABC123456789",
    "gateway_id" : "d4922d8a-6c8e-4396-852c-164aefa6638f",
    "device_name" : "dianadevice",
    "node_type" : "ENDPOINT",
    "description" : "watermeter device",
    "fw_version" : "1.1.0",
    "sw_version" : "1.1.0",
    "product_id" : "b640f4c203b7910fc3cbd446ed437cbd",
    "product_name" : "Thermometer",
    "status" : "INACTIVE",
    "tags" : [ {
      "tag_key" : "testTagName",
      "tag_value" : "testTagValue"
    } ]
  } ],
  "page" : {
    "count" : 100,
    "marker" : "5c8f3d2d3df1f10d803adbda"
  }
}