12.8. Application Messaging and Configuration

GEISA LwM2M object 3600 provides a bi-directional messaging facility for applications, with distinct resources defined for Client to Server messaging and Server to Client messaging. Object 3600 SHALL be used by ADM compliant platforms and EMS for sensor data reporting on the uplink (Client to Server) and edge app configuration on the downlink (Server to Client).

An ADM compliant EMS MAY Observe resource 1 to receive asynchronous LwM2M Notifications (containing app data) whenever the platform writes to resource 1 on behalf of the edge app.

An ADM compliant platform will receive asynchronous callbacks from its LwM2M Client whenever the EMS writes to resource 0 to reconfigure an edge app, and the platform SHALL forward that resource 0 payload (containing an app configuration) via GEISA API to the app identified in resource 4050.

Resource ID	Name	Operation	Data Type	Description
0	Server Message	Write	Opaque	Server to Client message used for edge app configuration.
1	Client Message	Read	Opaque	Client to Server message used for edge app data reporting.
2	Message Priority	ReadWrite	Integer	Priority: 0=Immediate, 1=BestEffort, 2=Latest
3	Message Desc	ReadWrite	Integer	Description: 0=AppConfiguration, 1=AppData
4050	AppID	ReadWrite	Integer	ID of the edge app using this object instance.

Edge App Data Reporting

Edge App Configuration