Querying Subdevices

Function

Querying Subdevices

Authorization Information

Each account has all the permissions required to call all APIs, but IAM users must be assigned the required permissions. For details about the required permissions, see Permissions Policies and Supported Actions.

URI

GET /v2/{project_id}/link/instances/{instance_id}/devices/{device_id}/subsets

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID. The default value is default for compatibility with 20.0.Project ID. For details about how to get the project ID, see "Appendix" > "Obtaining a Project ID" in this document.
instance_id	Yes	String	Instance ID. The default value is default for compatibility with 20.0.
device_id	Yes	Integer	Device ID.

**Table 2** Query Parameters
Parameter	Mandatory	Type	Description
limit	No	Integer	Number of items displayed on each page. The maximum value is 999. If the value exceeds 999, only 999 items are returned.
product_name	No	String	Product name.
device_name	No	String	Subdevice name.
status	No	Integer	Subdevice status. The options are as follows: 0: enabled; 1: disabled.
online_status	No	Integer	Connection status. The options are as follows: 0: disconnected; 1: online; 2: offline.
offset	No	Integer	Offset, which is the position where the query starts. The value must be greater than or equal to 0.

Request Parameters

**Table 3** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token, which can be obtained by calling the IAM API (value of X-Subject-Token in the response header).

Response Parameters

Status code: 200

**Table 4** Response body parameters
Parameter	Type	Description
total	Integer	Total.
size	Integer	Number of records displayed on each page.
items	Array of SubDevice objects	Device ID list.

**Table 5** SubDevice
Parameter	Type	Description
id	Integer	Device ID.
device_id	Integer	Device ID (compatible with 20.0).
parent_device_id	Integer	Parent device ID.
parent_device_name	String	Parent device name.
product	ProductReferer object	Product.
device_name	String	Device name. The value is a string of 2 to 64 characters, which can contain letters, digits, and the following special characters: ()_,#.?''-@%&!,
instance_id	String	Instance ID.
client_id	String	Client ID, which is the unique device ID generated by the ROMA platform.
node_id	String	Physical number of a device. The value is a string of 2 to 64 characters, which can contain only letters, digits, underscores (_), and hyphens (-). Generally, the MAC address or IMEI is used.
status	Integer	Device status. The options are as follows: 0: enabled; 1: disabled.
online_status	Integer	Connection status. The options are as follows: 0: disconnected; 1: online; 2: offline.
description	String	Description.
authentication	Authentication object	Authentication.
created_user	CreatedUser object	Name of the user who created the attribute.
last_updated_user	LastUpdatedUser object	User who performed the last update.
tags	Array of strings	Tag.
created_datetime	Long	Creation start time. The format is timestamp(ms) and the UTC time zone is used.
last_updated_datetime	Long	Last modification time (timestamp, in milliseconds). The UTC time zone is used.
connect_address	String	Device access address.
ssl_connect_address	String	Device access SSL address.
ipv6_connect_address	String	IPv6 address for device access. This parameter is valid only when IPv6 is enabled.
ipv6_ssl_connect_address	String	IPv6 SSL address for device access. This parameter is valid only when IPv6 is enabled.
app_id	String	Application ID.

**Table 6** ProductReferer
Parameter	Type	Description
product_id	Integer	Product ID. The product ID is mandatory if the manufacturer ID and model are not set.
product_name	String	Product name.
manufacturer_id	String	Manufacturer ID. If the product ID is not specified, the manufacturer ID and model are mandatory.
model	String	Model. If the product ID is not specified, the manufacturer ID and model are mandatory.
protocol_type	Integer	Protocol type of the product. 0: mqtt 1: CoAP 2: modbus 4: opcua 5: extended protocol
product_type	Integer	Product type. The options are as follows: 0: common; 1: gateway.
extend_protocol_name	String	Extended protocol name.

**Table 7** Authentication
Parameter	Type	Description
user_name	String	One-model-one-secret or one-device-one-secret username.
password	String	One-model-one-secret or one-device-one-secret password. The password must contain 16 to 32 characters, including at least one digit, one uppercase letter, one lowercase letter, and one special character (~!@#$%^&*()-_=+\|[{}];:<>/?).

**Table 8** CreatedUser
Parameter	Type	Description
user_id	String	User ID (reserved).
user_name	String	Username.

**Table 9** LastUpdatedUser
Parameter	Type	Description
user_id	String	User ID (reserved).
user_name	String	Username.

Status code: 400

**Table 10** Response body parameters
Parameter	Type	Description
error_code	String	System error code, which is the detailed error code of HTTP error codes 4xx and 5xx.
error_msg	String	Error description.
request_id	String	Message ID.

Status code: 404

**Table 11** Response body parameters
Parameter	Type	Description
error_code	String	System error code, which is the detailed error code of HTTP error codes 4xx and 5xx.
error_msg	String	Error description.
request_id	String	Message ID.

Status code: 500

**Table 12** Response body parameters
Parameter	Type	Description
error_code	String	System error code, which is the detailed error code of HTTP error codes 4xx and 5xx.
error_msg	String	Error description.
request_id	String	Message ID.

Example Requests

GET /{project_id}/link/instances/{instance_id}/devices/{device_id}/subsets

Example Responses

Status code: 200

{
  "total" : 1,
  "size" : 1,
  "items" : [ {
    "id" : 711537,
    "parent_device_id" : 711536,
    "parent_device_name" : "parent-device",
    "product" : {
      "product_id" : 116303,
      "product_name" : "p1",
      "manufacturer_id" : "p1",
      "model" : "p1",
      "product_type" : 0,
      "protocol_type" : 0
    },
    "device_name" : "device",
    "instance_id" : "8993a690-cf61-46af-880d-587d823d14e5",
    "client_id" : "D116303711537sGDtK",
    "node_id" : "string",
    "status" : 0,
    "online_status" : 2,
    "description" : "device",
    "authentication" : {
      "user_name" : "F01A8D25FE6E4CF5A286B711B31888AE",
      "password" : "************************"
    },
    "created_user" : {
      "user_id" : "",
      "user_name" : "user"
    },
    "last_updated_user" : {
      "user_id" : "",
      "user_name" : "user"
    },
    "tags" : [ ],
    "created_datetime" : 1607408244841,
    "last_updated_datetime" : 1607422571094,
    "connect_address" : "xx.xx.xx.xx",
    "ssl_connect_address" : "xx.xx.xx.xx",
    "ipv6_connect_address" : "xx.xx.xx.xx",
    "ipv6_ssl_connect_address" : "xx.xx.xx.xx",
    "app_id" : "cb4b3ec0-8f7f-432f-b05e-fc149d05da5d"
  } ]
}

Status code: 400

Bad Request

{
  "error_code" : "SCB.00000000",
  "error_msg" : "Parameter is not valid for operation [romalink.link-device.batchQuerySubDevices]. Parameter is [deviceOid]. Processor is [path].",
  "request_id" : "cb39e78a-afd3-4e04-901d-70468b1c23dc-1619602712496-cnnorth7a-P-romalink-service01"
}

Status code: 404

Not Found

{
  "error_code" : "SCB.00000000",
  "error_msg" : "Not Found",
  "request_id" : "624c8be1-39b6-47b7-941d-c159aced368a-1619602544650-cnnorth7a-P-romalink-service01"
}

Status code: 500

Internal Server Error

{
  "error_code" : "ROMA.00110002",
  "error_msg" : "The instance does not exist. project_id: 397cd10b30544c588b2f4a56d83856c4, instance_id: f3bb386a-23ec-47aa-9943-4c60ac658611",
  "request_id" : "c8c06d0a-be92-4fdf-9d10-bc20131ab158-1619593104919-cnnorth7a-P-romalink-service01"
}