Smart Tracker GPS portable tracker, Installation And Operation Manual, Page: 7 / 10

5.5 SOS alarm
Press SOS button for more than 3s to activate sos alarm, meanwhile you could feel the vibration, and
then the device will send an address information message to the sos number. If GPS is located, the
device will send an accurate address information, e.g.: “Emergency call(LBS): Bao’an Road, Bao’an
District, Shenzhen, Guangdong (N22.57139,E113.87710)”.If GPS is not located, the device will send a
LBS location information: e.g.:“Emergency call(LBS): nearby Bao’an Road Bao’an District, Shenzhen,
Guangdong (22.571,113.876)”. Then it will dial the sos numbers by cycle, if any sos number answer the
call, it will stop calling. If there’s no response after all the number been dialed for three cycles, it will stop.
5.6 Geo-fence
You can set a designated area as geo-fence. When the device gets in/out of this area, it will send alarm
to sos numbers when the geo-fence function is ON.
5.6.1 Turn on geo-fence
Geo-fence function is off as default. You can turn on geo-fence via sms command.
Circular fence
You can set a coordinate as the centre of the circular fence and set the radius
Go in fence sms command:
“ FENCE,ON,0, latitude, longitude, radius,IN# ” to open circular fence function
e.g.: FENCE,ON,0,N22.57139,E113.87710,5
，
IN #
It means the radius is 500 meters.
（
radius 1=100M
，
2=200M————and so on
）
The device will reply“OK”if set successfully. When the device is in this circular area, it will send alarm
to the sos numbers.
Go out fence sms:
“ FENCE,ON,0, latitude, longitude, radius,OUT# ” to open circular fence function
e.g.: FENCE,ON,0, N22.57139,E113.87710,5,OUT #
It means the radius is 500 meters.
（
radius 1=100M
，
2=200M————and so on
）
The device will reply“OK”if set successfully. When the device is out of this circular area, it will send alarm
to the sos numbers.
5.6.2 Disable Geo fence
If don’t need geo fence function, send sms to disable it: FENCE,OFF#
After get reply “OK”, geo fence function is off.
5.6.3 Check geo fence
If want to check status of geo fence, send SMS command " SEEFENCE# " to device from any number.
If geo fence is not active, it will reply SMS "Switch: OFF"
If geo fence is active, it will reply SMS "Switch: ON;State:IN&OUT;Lat:N22.567000;Lon:E113,890000,Ra
dius:100M;FenceType:Circle;"
5.7 Low battery alarm
When battery is low, device will send sms to sos numbers as following:
Low battery alarm sms: “Warning! Battery is low, please charge in time!”