Online Deep Sleep Mode; Virtual Odometer - Teltonika FMB920 User Manual

battery. Note, that power saving depends on two configurable parameters: send period and min.
record saving period in "X on Stop Mode".
FMB920 can enter deep sleep mode if ALL of these conditions are met:
 FMBXX has to be configured in Deep Sleep Mode and Sleep timeout is reached
 Device must be synchronized time with GNSS satellites and have GPS fix;
 Ignition (configured Ignition Source) is off.
 Movement by accelerometer or configured movement source is not detected;
 Min. Record Saving Period (Data Acquisition Mode settings) must be bigger than Active
Data Link Timeout parameter, that FMB920 could close GPRS link.
 Send period (Data Acquisition Mode settings) minus Active Data Link Timeout must be
more than 90 sec., that FMB920 could close GPRS link for at least 90 sec.
 Forced wakeup is not set;
 Have no SMS to read;
 Data socket(s) are close;
 Data sending is not in progress;
 FOTA is not in progress;
FMB920 exits deep sleep mode when if ONE of following conditions are true:
 Movement by accelerometer or configured movement source is detected;
 Ignition (configured Ignition Source) is turned on.
4.2.3

Online Deep Sleep mode

In this mode device works as in Deep Sleep mode, but without deregistering from GSM
network. GSM part stays powered, so this increases power consumption. In this mode, device
should receive/send SMS and make/receive calls. Also not closes GPRS context, if previously
opened.
Conditions to enter Online Sleep mode is the same as entering Deep Sleep mode.
FMB920 exits Online Sleep mode when if ONE of following conditions are true:
 Movement by accelerometer or configured movement source is detected;
 Ignition (configured Ignition Source) is turned on.
4.3

Virtual odometer

Virtual odometer is used to calculate traveled distance in FMB920 as separate I/O
elements. When FMB920 detects movement, it starts counting distance using GNSS signal: every
second it checks current location and calculates distance between current and previous point. It
keeps adding these intervals until it is time to make a record, then FMB920 records its location
and adds odometer value, which is equal to the sum of all distances, measured every second. The
are two odometers I/O elements: Total odometer and Trip odometer.
Total odometer counts all distance traveled by vehicle. After device restart the value in this
I/O element will not be erased. Total odometer value can be changed by SMS command
"odoset" (SMS Command list is described in
26 ICCID Integrated Circuit Card Identifier
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