4 Functioning
4.1 Main operating modes
This section describes the different operational modes supported by the trackers.
OFF mode: The tracker is in deep low power mode. No uplinks are sent in this mode. A long button press is
required to wake it up. Three possibilities to set the tracker in OFF mode:
➢ User action (long button press, if bit1 of config_flags is set)
➢ Low battery
➢ Downlink request
Standby mode: The tracker is sending periodically short LoRa messages, called heartbeat at the chosen
period (lora_period). Device positions can be obtained in this mode by using the side operations features (see
side operations section).
Motion tracking mode: The tracker provides positions when the device is moving. The reporting is done at
the chosen period (ul_period). The positions are acquired based on the geoloc_sensor geolocation
technology. If the device is not moving, heartbeat messages are sent regularly at the lora_period frequency.
End of motion is validated when the device hasn’t moved for 2 minutes.
When the device is static, only heartbeat messages are sent at the chosen period (lora_period). (like in
standby mode)
Note:
1- Whatever the chosen geolocation policy, the first position is always a WIFI one, sent immediately
after the beginning of the motion.
Permanent tracking mode: The device reports its positions at ul_period frequency regardless the motion. It
uses the geoloc_sensor geolocation technology. Heartbeat messages are sent if there are no uplink message
during lora_period seconds.
Note:
1- Having regular position can also be obtained using standby mode + side operation periodic position
See section Example to have an example of configuration
Motion Start/End tracking mode: In this mode, position messages are sent (motion_nb_pos +1)
times at the start and the end of a motion (one WIFI plus motion_nb_pos times using the geoloc_sensor
geolocation technology). The end of the motion is detected when there is no movement during 120 seconds.
Heartbeat messages are sent if there are no uplink message during lora_period seconds.
Activity mode: This mode sends activity reports instead of positions. The tracker focuses on detecting
movements. Each shake detection increases a counter (after applying an integration period). The value of
the counter is reported via the LoRa link at the ul_period frequency. Heartbeat messages are sent if there are
no uplink message during lora_period seconds.
Notes:
1- The accuracy of the different frequencies is not guaranteed as extra delays may be introduced by
the LoRa network duty cycle.
2- In all these modes, side operation can be used to obtain additional positions
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