Reference guide overview
This document details the Asset Tracker 3 (AT3) application firmware v1.4, covering:
Functioning
High level features
Release Notes
New features
Application design
The application design can be represented as follows:
Event manager
The event manager handles the application events. Any part of the application can register one or more event classes with the event manager to receive the corresponding events.
Geolocation manager
AT2 defines an operational mode used to select the geolocation mode
GNSS manager
Overview
Networking
Overview
Payload manager
This manager is responsible of creating the uplink messages and
Application uplinks
This section defines the frame format of uplinks sent to the network.
Uplink Data Buffering
Uplink Data Buffering helps reduce data loss when network coverage is unavailable or packets are lost, by allowing the device to replay uplink messages that may have been missed by the target application server.
Application downlinks
This section defines the downlinks sent by the network. The network can
Device and power monitoring
This manager monitors the system. It generates a core system event when
User Interface
This chapter explains how to configure the User Interface (UI), which
Device Firmware Update (DFU)
Firmware types and firmware update methods
Configuration
This section describes the current AT3 configuration parameters. It
BLE scan
This section focuses on the BLE scan geolocation technology.
System time update
Currently, the tracker requests the current date and time via the LoRaWAN or LTE network at startup, once it has successfully joined the network. Note that the system clock will drift over time due to the accuracy of the 32 kHz clock (approximately 10 ppm), so the system time should be updated periodically.