Help Center/ROMA Connect/Developer Guide/Developer Guide for Device Integration/MQTT Topic Specifications/Querying Gateway Child Device Information
Updated on 2025-07-21 GMT+08:00
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Querying Gateway Child Device Information

Topic

Topic

/v1/devices/{gatewayId}/topo/query

Publisher

Edge device

Subscriber

IoT platform

Parameter Description

Field

Mandatory/Optional

Type

Description

mid

Mandatory

Integer

Command ID.

nodeId

Mandatory

String

Device identifier.

The value must contain 2 to 64 characters and can consist of only uppercase and lowercase letters, digits, and hyphens (-).

Example

{
	"mid": 2,
	"nodeId": "test123"
}