API Overview

LwM2M Object Resources Supported by the IoT Platform

**Table 1** Supported LwM2M object resources
Path	Object	Resource	Function
/rd?ep={nodeId}	Device	Register	Connecting devices to the platform
/3/0/3	Device	Firmware Version	Querying the firmware version
/4/0/0	Connectivity monitoring	Network Bearer	Identifying the type of the network to which the device is connected
/4/0	Connectivity monitoring	Network Signal Strength	Querying the signal level
/4/0/8	Connectivity monitoring	Cell ID	Identifying a cell
/5/0/1	Firmware Update	Package URI	Delivering the firmware download URL
/5/0/2	Firmware Update	Update	Pushing a firmware upgrade notification
/5/0/3	Firmware Update	State	Pushing a firmware upgrade status notification
/5/0/5	Firmware Update	Update Result	Querying the firmware upgrade result
/19/0/0	BinaryAppDataContainer	Data	Upstream service message transmission
/19/1/0	BinaryAppDataContainer	Data	Downstream service data transmission

BinaryAppDataContainer: To simplify LwM2M object use for device manufacturers, Huawei defines this object, which is implemented by chips or modules. Devices only need to call AT commands or functions to send and receive service data, regardless of the LwM2M protocol. For details, see Specifications.

Authenticating a Device

API	Description
Authenticating a Device	When a device registers with the platform, the platform authenticates the device. The platform subscribes to resources from the device. The device obtains the token delivered by the platform for subscription. Token information must be carried when other APIs (for example, the API for property reporting) are called.

Reporting Device Properties

API	Description
Reporting Device Properties	A device reports properties to the platform by carrying the token delivered by the platform for /19/0/0 subscription.

Delivering a Command

API	Description
Delivering a Command	The IoT platform delivers a command to a device by packing the command into the payload of the LwM2M write message through the /19/1/0 resource object.