Placing Device Management Client in alert state

Device Management Client has a state called Alert(). In this state, the client halts all nonessential timers and stops automatic message sending to Device Management. Only application-triggered notifications are delivered in the alert state. Alert() is suitable when the device risks running out of battery or has limited amount of network bandwidth to ensure critical (alert) notifications can be sent. In the alert() state, the client ignores any confirmable requests from the service. (The server retransmits these.)

To continue client operations, the application should call MbedCloudClient::resume();

    MbedCloudClient::alert();

The result of that request can be:

• Success

  If Device Management Client is successfully placed in the Alert() state, the application receives the AlertMode result through the on_status_callback callback.

• Failure

  If Device Management Client can't go to the Alert() state, it instead places itself in the Pause() state. The application receives the Paused result through the on_status_callback callback.

It's the responsibility of the application to resume() the client operations before the device lifetime expires.