Before You Start

When the IoT platform functions as the message subscriber, it has subscribed to related topics by default. The IoT platform can receive messages sent by devices to the corresponding topics.
When a device functions as a message subscriber, the device needs to subscribe to related topics first so that the device can receive messages sent by the IoT platform to the corresponding topics. The device determines the topics to be subscribed to based on the specific business requirements.

Topic	Supported Protocol	Publisher	Subscriber	Function
/v1/devices/{gatewayId}/topo/add	MQTT	Edge device	IoT platform	The edge device adds a subdevice.
/v1/devices/{gatewayId}/topo/addResponse		IoT platform	Edge device	The IoT platform returns a response for adding a subdevice.
/v1/devices/{gatewayId}/topo/update		Edge device	IoT platform	The edge device updates the subdevice status.
/v1/devices/{gatewayId}/topo/updateResponse		IoT platform	Edge device	The IoT platform returns a response for updating the subdevice status.
/v1/devices/{gatewayId}/topo/delete		IoT platform	Edge device	The IoT platform deletes a subdevice.
/v1/devices/{gatewayId}/topo/query		Edge device	IoT platform	The edge device queries gateway information.
/v1/devices/{gatewayId}/topo/queryResponse		IoT platform	Edge device	The IoT platform returns a response for querying gateway information.
/v1/devices/{gatewayId}/command		IoT platform	Edge device	The IoT platform delivers a command to a device or an edge device.
/v1/devices/{gatewayId}/commandResponse		Edge device	IoT platform	The edge device returns a command response to the IoT platform.
/v1/devices/{gatewayId}/datas		Edge device	IoT platform	The edge device reports data.

In the preceding table, {gatewayId} indicates the device ID. Specifications of previous sites are inherited by delete, while specifications are not provided for deleteResponse now.

Parent topic: MQTT Topic Specifications

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