Micro Tracker User Guide FW1.6 V1.1
Page 5 of 17
11 October 2018
Company Confidential
–
restricted distribution
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)
➢
Low battery
➢
Downlink request
Standby mode:
The tracker is sending periodically short LoRa messages, called heartbeat at the
chosen period (
lora_period
). Device position can be obtained in this mode by using the side
operations features (see next 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. Additional positions can be obtained by using the on-demand side
operations features.
Note: Whatever the chosen geolocation policy, the first position is always established via WI-FIWi-
Fi 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.
Motion Start/End tracking mode
: In this mode, position messages are sent twice, at the start and
at the end of a motion (one Wi-Fi and one using the
geoloc_sensor
geolocation technology). The
end of the motion is detected when there is no movement detection for a period of 120 seconds.
Heartbeat messages are sent if there are no uplink message during
lora_period
seconds. Additional
positions can be obtained by using the on-demand side operation feature.
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 up the LoRa link at the
ul_period
frequency. Heartbeat
messages are sent if there are no uplink messages during
lora_period
seconds. Additional positions
can be obtained by using the on-demand side operations features.
Note
:
The accuracy of the different frequencies is not guaranteed as extra delay may be introduced
by the LoRa network duty cycle.
