Operational Basics; Operational Principals; Sleep Modes; Gps Sleep Mode - Teltonika FMB920 User Manual

4 OPERATIONAL BASICS

4.1

Operational principals

FMB920 module is designed to acquire records and send them to the server. Records
contain GNSS data and I/O information. Module uses GNSS receiver to acquire GNSS data and is
powered with three data acquiring methods: time-based, distance-based and angle-based. Note,
that if FMB920 loses connection to GNSS satellites, it continues to make records, however
coordinate in these records remains the same (last known coordinate). All data is stored in flash
memory and later can be sent via GPRS.
GPRS and SMS settings are described in later sections. FMB920 communicates with server
using special data protocol.
FMB920 can be managed by SMS commands. SMS Command list is described in
26 ICCID
27
SD Status
28 Eco Score
SMS COMMAND LIST
4.2

Sleep modes

There are three sleep modes: GPS sleep, Deep sleep and Online sleep mode.
4.2.1

GPS Sleep mode

FMB920 is able to go to GPS sleep mode if such mode is enabled.
Sleep mode timeout (defined period in minutes) starts counting when device is in STOP
mode. After timeout is reached and all conditions for GPS sleep mode are met, device goes to
sleep mode. While in GPS sleep mode, FMB920 turns GPS module off and it is still making new
periodic records. As a result power usage decreases, in turn saving vehicle battery.
FMB920 can enter GPS sleep mode if ALL of these conditions are met:
 FMB920 has to be configured to work in GPS Sleep mode and start sleep timeout is
reached;
 Device must be synchronized time with GNSS satellites and have GPS fix;
 No movement by configured movement source or movement sensor is detected;
 Ignition (configured Ignition Source) is off.
 Forced wakeup is not set;
 Have no SMS to read;
FMB920 exits GPS sleep mode when if ONE of following conditions are true:
 Movement by movement source or movement sensor is detected;
 Ignition (configured Ignition Source) is turned on.
4.2.2

Deep Sleep mode

While in deep sleep mode, FMB920 sets GNSS receiver to sleep mode and turns off
GSM/GPRS module (it is not possible to wake up device via SMS). Despite records with last
known coordinate are being saved and send to AVL server (GSM/GPRS module is turned on to
send data and after that it is turned off again), power usage is decreased to save vehicle's
Integrated Circuit Card Identifier
0 – SD card not inserted
1 – SD card inserted
Eco driving score during particular trip, 0 - 10
section. Module configuration can be performed only via SMS.
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