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Downlink Messages

An application server can send downlink messages to the device to trigger actions, request information, or change its behaviour.

The list below gives a quick overview of the main message types. The examples are only there to illustrate each type and are not exhaustive.

Downlink message types have two categories: Command messages and Request messages.

Command Messages​

Command messages are sent to trigger actions on the device. Examples of request messages are

  • Reset the tracker
  • Start or stop SOS
  • Request a position on demand
  • Set the GPS/BeiDou almanac
  • Start or stop BLE connectivity
  • Get buffered uplinks
  • etc.

Request Messages​

Request messages are sent to read information from the device or to update its configuration.

  • Configuration get/set requests
  • BLE connectivity status request
  • CRC configuration request
  • Sensor value requests
  • Debug information requests
  • FUOTA (Firmware Update Over The Air) requests

Further Reading​