Specifications

GV300 @Track Air Interface Protocol
 <Mode>: The working mode of the fixed report.
z 0: Disable this function.
z 1: Fixed Timing Report. The positional report message is sent to the backend server
periodically according to the parameter <Send Interval>.
z 2: Fixed Distance Report. The positional report message is sent to the backend server
when the straight-line distance between the current GPS position and the last sent
GPS position is greater than or equal to the distance specified by parameter
<Distance>.
z 3: Fixed Mileage Report. The positional report message is sent to the backend server
when the path length between the current GPS position and the last sent GPS position
is greater than or equal to the mileage specified by parameter <Mileage>. This
function need connect the vehicle ignition signal to the specified digital input port of
the device.
z 4: Optimum Report. Simultaneously observe both time interval and path length
between two adjacent reports. Report device position if the calculated time interval
per current time against the last report time is greater than the <Send Interval>, and
the length of path between the current position and the last position is greater than the
<Mileage> setting. This function need connect the vehicle ignition signal to the
specified digital input port of the device.
 <Discard No Fix>: Disable/enable reporting when there is no GPS fixing
z 0: Enable reporting
z 1: Disable reporting
 <Period Enable>: Disable/enable the time range specified by <Start time> and <End time>. If
the time range is enabled, the position reporting is limited within the time range.
 <Start Time>: The start time of the scheduled fixed report. The valid format is “HHMM”. The
value range of “HH” is “00”–“23”. The value range of “MM” is “00”–“59”.
 <End Time>: The end time of the scheduled fixed report. The valid format and range are
same as <Start Time>.
 <Check Interval>: The interval time to fix GPS, its value range is 30 – 86400 and the unit is
second. The parameter is used only when the parameter <GPS On Need> in AT+GTCFG is
set to 1.
If <GPS On Need> was set as 1, the device has two modes to operate the GPS module
according to the value of <Check Interval>:
z “Normal mode”: If the <Check Interval> is no less than 60 seconds, the terminal will
close the GPS chip every time after GPS fixing finishes in order to save power.
z
“Emergency mode”: If the <Check Interval> is less than 60 seconds, the terminal
will never close the GPS chip unless <Power Saving Enable> is 1 and the state in
+RESP:GTINF is 0x16(Tow) or 0x1A(Fake Tow) or 0x11(Ignition Off Rest) or
0x12(Ignition Off Motion) or 0x41(Sensor Rest). In this mode, the <Send Interval>
will be ignored, the terminal reports every <Check Interval> time, and the <Check
Interval> will be forced to 30 seconds if it is less than 30 seconds.
Due to the limitation of the maximum report message length, it must be assured that: <Send
Interval> / <Check Interval> <= 15.
 <Send Interval>: Period to send the position information. The value range is 5 – 86400 and
TRACGV300AN002 – 33 –
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