GL100 @Track Air Interface Protocol
4.3. Fixed Timing Report
“Fixed timing report” is a basic function of the @Track Protocol. The backend server can
configure the <
start time
> and <
end time
> to schedule periodical position reports. In the
pre-defined period of time, the terminal will start up GPS every <
fix interval
> time and report the
recorded position log to the backend server every <
send interval
> time.
The following is an example of “fixed timing report”:
AT+GTTRI=gl100,
1000
,
2300
,
5
,
60
,20090101000000
<
start time
> = 1000
<
end time
> = 2300
<
send interval
> = 5
<
fix interval
> = 60
¾
Fix and send interval
The terminal has two modes to operate the GPS module according to the value of <
fix interval
>:
“Normal mode”: If the <
fix interval
> is more than 60 seconds, the terminal will close the
GPS part every time after GPS fixing finishes in order to save power.
“Emergency mode”: If the <
fix interval
> is less than 60 seconds, the terminal will never close
the GPS part. In this mode, the <
send interval
> will be ignored, the terminal reports every
<
fix interval
> time, and the <
fix interval
> will be forced to longer than 5 seconds.
If the terminal is in “Force on SMS Mode” (<
report mode
> = 2), it will only send fixed timing
report when <
send interval
> = <
fix Interval
>. This means that every report message only includes
one position record.
Due to the maximum length limitation of the report message, it must be assured that: <
send
interval
> / <
fix Interval
> <= 15.
If <
send interval>
or <
fix Interval
> is 0, the fixed timing report will be disabled.
¾
Action time range
<
begin time
> < <
end time
>: reports in the time period (begin time, end time) every day.
<
begin time
> > <
end time
>: reports starting from “Begin time” and stopping at “End time”
on the following day.
<
begin time
> = <
end time
>: reports on the whole day.
Examples:
AT+GTTRI=gl100,
1000
,
2300
,
8
,
120
,20090101000000
Reports from
10:00
to
23:00
every day.
Power on GPS every
120
seconds and power off after GPS fixing finishes.
Send fixed timing report every 8 minutes.
Please note in this example each fixed timing report message will include 4 (
8
*60/
120
)
TRACGL100AN002
- 35 -
Quectel
Confidential
