Operational Basics; Operational Principals; Sleep Mode; Deep Sleep Mode - Teltonika FM4200 User Manual

OPERATIONAL BASICS

5
5.1

Operational principals

FM4200 module is designed to acquire records and send them to server. Records
contain GPS and I/O information. Module uses GPS receiver to acquire GPS data and is
powered with 3 data acquire methods: time-based, distance-based, angle-based methods.
Method's details are described in GPS section. All data is stored in flash memory and later
can be sent via GPRS or SMS channels. GPRS mode is most preferred data sending mode.
SMS mode is mostly used in areas without GPRS coverage or GPRS usage is too expensive.
GPRS and SMS settings are described in GPRS section. FM4200 communicates with
server using special data protocol. Data protocol is described in "FM Protocols" document.
FM4200 can be managed by SMS commands. SMS Command list is described in SMS
Command List section.
Configuration parameters and modes are described in "FM Protocols" document.
5.2

Sleep mode

FM4200 can enter sleep mode (standby mode) under two conditions:
• FM4 does not detect movement. Accelerometer has to be configured properly, so it
provides correct indication about movement. Usually most sensitive settings are
used. See accelerometer settings in chapter 6 for more details.
• FM4 does not send or receive any data for 5 minutes. This means that if coordinate
recording interval is more frequent than 5 minutes, FM4 will never go to sleep mode.
FM4 can exit sleep when:
• FM4 detects movement (accelerometer has to be configured properly).
While in sleep mode, FM4 sets GPS receiver to sleep mode, therefore it does not
record or send any data. The power usage also decreases allowing saving vehicle battery.
5.3

Deep sleep mode

To enter and exit deep sleep mode FM4200 uses same conditions as for simple sleep
mode. Deep sleep forces device to turn off GPS receiver and modem significantly reducing
power consumption. Note that in this mode FM4200 is not able to receive SMS. While in
deep sleep mode, internal battery still gets discharged and reaches its minimum level in about
20 hours. FM4200 will start charging internal battery every 20 hours for two-hour period.
Charging currents is 30 mA. FM4200 only detects events based on AIN, DIN, power supply
and PCB temperature while in deep sleep mode (movement also is detected as it wakes
device up from deep sleep mode).
5.4

Accelerometer

FM4200 has a built in 3 axis accelerometer which allows device to indicate if vehicle is
moving or not as well as measure acceleration. Accelerometer sensitivity can be configured –
it has 5 ongoing parameters: Delta X, Y and Z define angles in 3D space and start/stop
timeouts define time intervals in milliseconds. To indicate that vehicle is moving, FM4200
constantly checks for angle change greater than the one defined in Delta X, Y or Z fields. If
angle keeps changing for defined time interval in 'Start Move Timeout' field, then vehicle is
considered as moving. Same settings for idle indication apply – if angle change is less than
Module configuration can be performed over TCP or via SMS.
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