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

4 OPERATIONAL BASICS

4.1

Operational principals

FMB900 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 FMB900 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. FMB900 communicates with server
using special data protocol.
FMB900 can be managed by SMS commands. SMS Command list is described in SMS
COMMAND LIST section.
4.2

Sleep modes

4.2.1

Sleep mode

FMB900 is able to go to sleep mode if such mode is enabled.
This timeout (defined period) starts counting when device is in STOP mode. After timeout
is reached and all conditions for sleep mode are met, device goes to sleep mode. While in sleep
mode, FMB900 turns GPS module off and it is still making new periodic records. As a result
power usage decreases, in turn saving vehicle battery.
FMB900 can enter sleep mode if ALL of these conditions are met:
 FMB900 has to be configured to work in Sleep mode and start sleep timeout is
reached;
 Device must have synchronized time with GNSS satellites;
 No movement by movement sensor is detected;
 Ignition (configured Ignition Source) is off.
FMB900 exits sleep mode when if ONE of following conditions are true:
 Movement by movement sensor is detected;
 Ignition (configured Ignition Source) is turned on.
4.2.2

Deep Sleep mode

While in deep sleep mode, FMB900 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
battery. Note, that power saving depends on two configurable parameters: send period and min.
record saving period in "X on Stop Mode".
FMB900 can enter deep sleep mode if ALL of these conditions are met:
parameter);
Module configuration can be performed only via SMS.
FMB900 has to be configured to work in Deep Sleep mode;
Device must be synchronized time with GNSS satellites;
FMB900 has to be in „X on Stop Mode" (Configured by Mode switch
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