22
Figure 15. FM3620 firmware updating finished
When you see a table like in Figure 15, it means that the firmware is sent to FM3620
successfully. Wait until system led stops blinking fast and you may now close the update window
and start using your FM3620 device.
5
OPERATIONAL BASICS
5.1
Operational principals
FM3620 module is designed to acquire records and send them to server. Records contain
GNSS data and I/O information. Module uses GNSS receiver to acquire GNSS data and is powered
with four data acquire methods: time-based, distance-based, angle-based and speed-based
method. Note, that if FM3620 loses connection to GNSS satellites, it continues to make records,
however coordinate in these records remains the same (last known coordinate). Method’s
details are described in section 5.13. All data is stored in flash memory and later can be sent via
3G, GPRS or SMS. 3G mode is the most preferred data sending mode. If 3G coverage is not
available the device sends data through GPRS network. FM3620 can also be configured to send
data over GPRS and SMS only. This mode can be used to save bills or in the areas where 3G is not
available. The least preferred data sending mode is SMS, which is mostly used in areas without
GPRS coverage or GPRS usage is too expensive.
3G, GPRS and SMS settings are described in further sections. FM3620 communicates with
server using special data protocol. Data protocol is described in “FMXXXX Protocols” document.
FM3620 can be managed by SMS commands. SMS Command list is described in SMS
COMMAND LIST section
.
Module configuration can be performed over TCP or via SMS.
Configuration parameters and modes are described in “FMXXXX Protocols” document.
5.2
Sleep modes
5.2.1
Sleep mode
FM3620 is able to go to Sleep mode after configured interval of time. While in sleep mode,
FM3620 sets GNSS receiver to sleep mode and it isn’t making periodic records (only event
records is being recorded with last known coordinate and sent to AVL server). As a result power
usage decreases allowing saving vehicle battery.