MeiTrack VT310 User manual

GPS
Vehicle
Tracker
User Manual
V7.1
VT310

- 2 -
Contents
1. Product Overview................................................................................................................. - 3 -
2. For Your Safety .................................................................................................................... - 3 -
3. VT310 Characteristics ........................................................................................................... - 4 -
4. Getting Started.................................................................................................................... - 5 -
4.1 Hardware and Accessories ............................................................................................. - 5 -
4.2 View ........................................................................................................................... - 5 -
4.3 Functional Parts............................................................................................................ - 5 -
4.4 Connecting and Installation............................................................................................ - 7 -
5. Change Password................................................................................................................. - 7 -
6. Time Zone........................................................................................................................... - 8 -
7. Track .................................................................................................................................. - 8 -
7.1 Track by SMS ............................................................................................................... - 8 -
7.2 Track by Calling ............................................................................................................ - 9 -
7.3 Track by Preset Interval................................................................................................. - 9 -
7.4 Google Earth and Google Map ........................................................................................ - 9 -
7.5 Track by MS01/MS02 ...................................................................................................- 10 -
7.6 Track by GPRS (Meiligao Protocol) between Server and Tracker .........................................- 10 -
7.6.1 Set Tracker‟s GPRS ID..........................................................................................- 10 -
7.6.2 Set APN .............................................................................................................- 11 -
7.6.3 Set IP and Port ...................................................................................................- 11 -
7.6.4 Set DNS Server IP (optional) ................................................................................- 11 -
7.6.5 Enable GPRS Tracking ..........................................................................................- 11 -
7.6.6 Set GPRS Interval ...............................................................................................- 11 -
7.7 Track by GpsGate ........................................................................................................- 12 -
8. Authorization......................................................................................................................- 12 -
9. Application Examples for Inputs ............................................................................................- 12 -
9.1 SOS Button Connection ................................................................................................- 12 -
9.2 Detecting Lock Status of Car‟s Door or Trunk (Car Boot). ..................................................- 13 -
9.3 Connecting with Switch Sensors ....................................................................................- 13 -
9.4 Ignition Detection ........................................................................................................- 13 -
9.5 Analog Input (AD1 and AD2).........................................................................................- 13 -
10. Speeding Alarm ................................................................................................................- 14 -
11. Movement/Geo-fence.........................................................................................................- 14 -
11.1 Movement Alarm........................................................................................................- 15 -
11.2 Geo-fence Alarm........................................................................................................- 15 -
12. Track by Distance ..............................................................................................................- 16 -
13. Listening-in (Optional) .......................................................................................................- 16 -
14. Set Sensitivity of Tremble Sensor ........................................................................................- 16 -
15. Output Control..................................................................................................................- 16 -
15.1 Output Control (Immediate)........................................................................................- 16 -
15.2 Output Control (Conditional) .......................................................................................- 17 -
15.3 Application Examples for Outputs.................................................................................- 17 -
15.3.1 Engine Cut........................................................................................................- 17 -
15.3.2 Connecting with Car Alarm .................................................................................- 17 -
16. Heading Change Report .....................................................................................................- 18 -
17. Heartbeat.........................................................................................................................- 18 -
18. Track Log .........................................................................................................................- 18 -
18.1 Log by Interval ..........................................................................................................- 18 -
18.2 Auto Log when no GPRS .............................................................................................- 19 -
18.3 Format Buffer ............................................................................................................- 19 -
19. Power Down .....................................................................................................................- 19 -
20. Get IMEI ..........................................................................................................................- 20 -
21. Initialization .....................................................................................................................- 20 -
22. Password Initialization .......................................................................................................- 20 -
23. Parameter Editor ...............................................................................................................- 20 -
24. Copyright and Disclaimer ...................................................................................................- 21 -
Annex 1. SMS Command List ...................................................................................................- 21 -
Annex 2. Troubleshooting ........................................................................................................- 27 -
Contacts ................................................................................................................................- 29 -

- 3 -
1. Product Overview
VT310 is a GPS/GPRS based tracking device, specially developed and designed for vehicle real-time tracking
and fleet management.
VT310 has an inbuilt GPS module to obtain accurate position data. This device utilizes its GSM capability to
send position data to a specified mobile phone or server base for tracking and fleet management.
With internal memory, VT310 can store GPS coordinates when there is no GPRS connection, or at a specified
interval requested by the user.
One optional feature of VT310 is that a microphone can be linked and hidden somewhere inside the vehicle
for listening to the cabin.
VT310 has the following functions and features:
SMS and GPRS TCP/UDP Communication (Meiligao Protocol)
AGPS ( with GSM Base Station ID)
Track on Demand
Show Location Directly on Mobile Phone
Track by Time Interval
Track by Distance
GSM Blind Area Memory
Internal Memory for Logging
Inbuilt Motion Sensor for Power Saving
SOS Panic Button
Movement Alarm
Geo-fencing Control
Low Battery Alarm
Speeding Alarm
GPS Blind Area Alarm (in/out)
Power-cut Alarm
Engine Cut (Stop Engine)
I/O: 5 digital inputs (3 negative and 2 positive triggering), 5 outputs and 2 analog inputs of 10 bits
resolution
2. For Your Safety
Read these simple guidelines. Not following them may be dangerous or illegal.
Proper Connection
Do not connect any parts of this product to other incompatible devices.
When connecting with other devices, read instructions carefully to

- 4 -
ensure proper installation.
Qualified Accessories
Use original parts, qualified batteries and peripheral equipments to
avoid damage to VT310.
Safe Driving
Drivers should not operate this product while driving.
Qualified Service
Only qualified personnel can install or repair VT310.
Water Resistance
VT310 is not water resistant. Keep it dry. Install this device inside the
vehicle or use a waterproof bag for protection if necessary.
Confidential Phone Number
For safety reason, do not tell other people the mobile phone number of
your VT310 without taking precautions of security settings.
3. VT310 Characteristics
Items
Specifications
Power Supply
+9V - +36V / 1.5A
Backup Battery
850mAh
Normal power consumption
85mA/h
Dimension
104mm x 62mm x 24mm
Installation Dimension
104mm x 83mm x 24mm
Weight
190g
Operating temperature
-20°to 55°C
Humidity
5% to 95% Non-condensing
Frequency
Quad Band GSM 850/900/1800/1900Mhz
GPS Module
latest GPS SIRF-Star III chipset
GPS Sensitivity
-159Db
GPS Frequency
L1, 1575.42 MHz
C/A Code
1.023 MHz chip rate
Channels
20 channel all-in-view tracking
Position Accuracy
10 meters, 2D RMS
Velocity Accuracy
0.1 m/s
Time Accuracy
1 us synchronized to GPS time
Default datum
WGS-84
Reacquisition
0.1 sec., average
Hot start
1 sec., average
Warm start
38 sec., average
Cold start
42 sec., average
Altitude Limit
18,000 meters (60,000 feet) max
Velocity Limit
515 meters/second (1000 knots) max
LED
2 LED lights to show GPS/GSM status
Flash Memory
4MB
Button
One SOS Button
Interface
5 digital inputs (3 negative and 2 positive triggering)
2 analog inputs
5 outputs.

- 5 -
4. Getting Started
This section will describe how to set up your VT310.
4.1 Hardware and Accessories
VT310 is supplied in a box which includes:
VT310 with Battery
GPS Antenna
GSM Antenna
Wires with SOS Button
USB Cable
CD
4.2 View
Front View
Side View
Back View
4.3 Functional Parts
GPS LED (Blue)
On
One button is pressed or input is active
Flashing ( every 0.1 second)
The unit is being initialized

- 6 -
Flashing (0.1 second on and 2.9 seconds off)
VT310 has a GPS fix
Flashing (1 second on and 2 seconds off)
VT310 has no GPS fix
GSM LED (Green)
On
A call is coming in / a call is being made
Flashing ( every 0.1 second)
The unit is being initialized
Flashing (0.1 second on and 2.9 seconds off)
VT310 is connected to the GSM network
Flashing (1 second on and 2 seconds off)
VT310 is not connected to the GSM network
Power On/Off Button
Press and hold for 3~5 seconds to turn on/off VT310
SOS Button
SOS button is connected with the wires. Press it to send SOS alarm to
the preauthorized phone number.
Mini USB
Used for firmware update, configuration on PC and exporting stored
data. (USB-to-Serial Adaptor is required for firmware update,
configuration and exporting stored data)
SIM Card Holder
Insert SIM card here
GSM Antenna
Connector for GSM antenna
GPS Antenna
Connector for GPS antenna
Screw Holes
There are 4 screw holes on the tracker, 2 along either side that act as
fixing points to the vehicle
Microphone (optional)
A microphone to be linked out for listening to the cabin (wiretapping)
PINs Connector
PIN
Color
Function
Power
Red
DC In (power input). Input voltage: 9V~36V. 12V suggested
GND
Black
Ground
In
White
Digital Inputs. In1, In2 and In3 are negative triggering; In4 and In5 are positive triggering
Out
Yellow
Outputs. Low voltage (0V) when effective and open drain when ineffective
Output open drain sink voltage (ineffective): 45V max.
Output low voltage sink current (effective): 500mA max.
AD
Blue
10 Bits Resolution Analog Inputs. Input voltage: 0~6V
DC Characteristics of PINs
PIN
Inactive
Active
Maximum
Input 1/2/3
Open drain or >1V
0V(GND)
45V
Input 4/5
Open drain or 0V(GND)
>3V
45V
Output 1/2/3/4/5
Open drain
0V (GND)
45V/500mA
DC IN
/
9-36V
45V

- 7 -
AD 1/2
/
0-6V
45V
4.4 Connecting and Installation
Read this manual before using your VT310. Check to make sure all parts are included in the packaging box.
4.4.1 Ensure that your VT310 has a working SIM card installed.
- Check that the SIM card has not run out of credit (test the SIM card in a phone to
make sure it can send and receive SMS)
- Check that the SIM card lock code is turned off
- If you require the function of sending an SMS location report to the authorized
phone number when it makes a call to the VT310, please make sure the SIM installed
supports displaying caller ID.
Before inserting SIM card, cut off the power for VT310.
Install SIM Card
- Unscrew and remove the front cover of VT310.
- Insert the SIM card by sliding it into the card slot with the chip module facing the
connectors on PCB.
- Replace the front cover and screw it in.
4.4.2 Antenna Connection
Connect the GSM Antenna to VT310.
Connect the GPS Antenna to VT310.
- GPS antenna is used to receive satellite signals in the sky. It should be fixed to face
the sky, (It is recommended to place this device under the windshield) and should not
be covered or shielded by any objects containing metal.
4.4.3 Find a suitable place inside the car for installing VT310. Wiring connections
must be firm and reliable. The joints should be wrapped tightly with insulating tape.
The unused electrical wire should be properly insulated.
Check to make sure all wirings have been connected correctly. Then connect the AVL
unit to the motor power.
Make a missed phone call the VT310 using a mobile phone to check if the call can go
through. The VT310 should reply with an SMS indicating longitude, latitude, speed
and date.
5. Change Password
Command: W******,001,######
Description: Change user‟s password.
Note:
1. ****** is user‟s password and the default password is 000000. The tracker will only accept commands
from a user with the correct password. Commands with wrong password will be ignored.

- 8 -
2. ###### is the new password. Password should be 6 digits.
Example:
W000000,001,123456
W123456,001,999999
6. Time Zone
Command: W******,032,T
Description: Correct time to your local time
Note:
1. Default time of the tracker is GMT
2. This correction is applied to location reports by SMS and SMS alarms.
T=0, to turn off this function;
T=_[-32768,32767] to set time difference in minutes to GMT.
For those ahead of GMT, input the time difference in minutes directly.
For example, for GMT+8, W000000,032,480. (8 Hours is 480 minutes)
„-„is required for those behind GMT.
For example, W000000,032,-120. (2 hours or 120 minutes behind GMT)
Example:
W000000,032,480
W000000,032,-120
7. Track
7.1 Track by SMS
- Track on Demand - Reply with longitude, latitude, speed and date
Command: W******,000
Description: To get the current location of the tracker, send this command as an SMS or make a telephone
call directly to the tracker. After doing so, the device will report its longitude and latitude by SMS with the
format as follows:
Latitude = 22 32 36.63N Longitude = 114 04 57.37E, Speed = 2.6854Km/h, 2008-12-24,01:50
Example:
W000000,000
- Track on Demand - Reply with a link to Google Maps
Command: W******,100
Description: Send this command to the tracker and you will receive an SMS with an http link. Click on the
link and the location will be shown directly on your mobile phone using Google maps. For example:
http://maps.google.com/maps?f=q&hl=en&q=22.540103,114.082329&ie=UTF8&z=16&iwloc=addr&om=1
Note: Only smart phones and PDAs support this function.

- 9 -
Example:
W000000,100
7.2 Track by Calling
Make a missed call to the tracker and it will report its longitude and latitude by SMS with the following
format:
Latitude = 22 32 36.63N Longitude = 114 04 57.37E, Speed = 2.6854Km/h, 2008-12-24, 01:50
7.3 Track by Preset Interval
Command: W******,002,XXX
Description: Set an interval for the tracker to continuously report its location by SMS
Note:
1. XXX is the interval in minutes;
2. XXX=000 to turn off tracking by time.
Example:
W000000,002,030
The tracker will send location data back to your mobile phone every 30 minutes.
7.4 Google Earth and Google Map
Download Google Earth from http://earth.google.com/.
Start Google Earth (For more information about Google Earth please refer to http://earth.google.com/ or go
to http://maps.google.com)
Input the latitude and longitude that you received from the tracker by SMS and click the search button.
Google Earth or Google Maps will display the location for you.
Example:
When you receive: Latitude = 22 32 40.05N Longitude = 114 04 57.74E
Type as the following picture shows:
(Note: you should input the latitude and longitude as: 22 32 40.05N 114 04 57.74E)
And then you can find the location of your tracker:

- 10 -
You can also use local map software on PDA or car navigation device to input the coordinates.
7.5 Track by MS01/MS02
You can also see a physical location on a map with our GPS Tracking Software MS01 or MS02.
This software is available for purchase and can be used for tracking after proper configuration.
Please refer to MS01/MS02 User Guide for more information.
7.6 Track by GPRS (Meiligao Protocol) between Server and Tracker
7.6.1 Set Tracker’s GPRS ID
Command: W******,010,ID
Description: Set a digital GPRS ID for the tracker.
Note: GPRS ID must not be over 14 digits.
Example:
W000000,010,00001

- 11 -
7.6.2 Set APN
Command: W******,011,APN,Username,Password
Description: Set APN details for the tracker
Note:
1. APN username and password are optional. If no APN username and password are required, just input APN
only;
2. APN defaulted as „CMNET‟;
3. APN + username + password should not over 39 characters.
Example:
W000000,011,CMNET,Meiligao,6688
W000000,011,CMNET
7.6.3 Set IP and Port
Command: W******,012,IP,Port
Description: Set the IP and Port of tracker for GPRS communication.
Note:
1. IP is your server‟s IP or the domain name.
2. Port: [1,65534]
Example:
W000000,012, 220.121.7.89,8500
W000000,012,www.meiligao.net,8500
7.6.4 Set DNS Server IP (optional)
Command: W******,009,DNS Server IP
Description: If the domain name you set by the last command (W******,012,IP, Port) doesn‟t work, your
server IP is not properly set. You can first use this command to set DNS Server IP (please check with your
DNS server provider for the DNS Server IP) and then redo the command W******,012,IP, Port.
Example: W000000,009,220.23.4.90
7.6.5 Enable GPRS Tracking
Command: W******, 013, X
Description: Enable GPRS tracking function.
Note:
X=0, to turn off GPRS tracking (default);
X=1, to enable GPRS tracking via TCP;
X=2, to enable GPRS tracking via UDP.
Example: W000000,013,1
7.6.6 Set GPRS Interval
Command: W******,014,XXXXX
Description: Set time interval for sending GPRS packets.
Note:
XXXXX should be in five digits and in unit of 10 seconds.

- 12 -
XXXXX=00000, to turn off this function;
XXXXX=00001~65535, time interval for sending GPRS packet and in unit of 10 seconds.
Example: W000000,014,00060
In this example, the tracker will send every 600 seconds (10 minutes).
For more information regarding GPRS tracking please refer to GPRS Communication Protocol.
7.7 Track by GpsGate
The GT30i supports GpsGate Software.
Please contact our company or GpsGate for more information for settings.
8. Authorization
Command: W******,003,F,P,T
Description: Authorize phone numbers for the SOS/inputs, receiving location reports, SMS alarms or
phone calls
Note:
F=0, to turn off this function; (default)
F=1, only sends SMS to the authorized phone number;
F=2, only calls the authorized phone number;
F=3, both SMS and calling.
(Note: VT310 doesn‟t support two-way conversation. Calling only gives ring and reminder to the authorized
phone.)
P=1, set an authorized number for SOS button (Input 1);
P=2, set an authorized number for Input 2;
P=3, set an authorized number for Input 3.
T: Preset phone number. Max.16 digits.
Example:
W000000,003,1,1,88888888
9. Application Examples for Inputs
9.1 SOS Button Connection
Connect the SOS button and wires as below picture shows:
Note: input voltage to Input must not over 45V
After above authorization is completed, once the SOS is pressed, an SOS SMS - “SOS Alarm” will be sent to
Input 1 or Input 2 or Input 3
White
SOS Button

- 13 -
the preauthorized phone number. Then a message with longitude and latitude will follow.
(Note: An SOS button is already connected to VT310 in standard packing)
9.2 Detecting Lock Status of Car’s Door or Trunk (Car Boot).
When the lock is opened, there will be a negative trigger to Input 1 or Input 2 or Input 3. After this, an SMS
alarm will be sent to the authorized phone number, or a GPRS alarm will be sent to the server (please refer
to the GPRS Command 0x9999 in GPRS Communication Protocol).
9.3 Connecting with Switch Sensors
The SMS alarm will be sent to the authorized phone number.
9.4 Ignition Detection
Input 4 or Input 5 (positive triggering) can be used for ignition detection. The detection alarm will be sent to
the server via GPRS. Please refer to <GPRS Communication Protocol> Alarm Command 0x9999 for more
information.
9.5 Analog Input (AD1 and AD2)
Input voltage should be 0~6V. Please refer to GPRS Communication Protocol for more information for
AD1 and AD2 data.
For example:
094506.000,A,2232.5412,N,11404.6919,E,0.00,,290709,,*12|1.7|110|0000|00AA,0267
AD1 is 0x00AA and AD2 is 0x0267.
White
Switch Sensor
Ignition Switch
Input 4 or Input 5
Battery
Lock Controller
lock
unlock
Input 1 or Input 2 or Input 3
White
Lock Switch
Power supply
Input 1 or Input 2 or Input 3
Power for ignition

- 14 -
Voltage Formula: Input Voltage=(AD*6)/1024
0x00AA=>170(decimal)=>(170*6)/1024=0.99609375V(voltage)
0x0267=>615(decimal)=>(615*6)/1024=3.603515625V(voltage)
Application Example - Fuel Level Sensor
Fuel level sensors supplied by us are resistance-type sensors with output
resistance: 0-200Ω(ohm).
For the circuit shown on the right picture, if VCC is 12V, R should be
200Ω(ohm) and if VCC is 24V then R should be 600Ω(ohm) to make the
input range to AD1 or AD2 is 0-6V.
The below formula is for calculating the fuel percentage left for this fuel
level sensor:
Note: The value must be converted into decimal, for example, 0x0267 is
615 in decimal.
10. Speeding Alarm
Command: W******,005,XX
Description: Turn on speeding alarm. When the tracker speeds higher than the preset value, it will send an
SMS alarm to the authorized phone number for SOS.
Note: XX is the preset value of speed and in 2 digits.
=00 , to turn off this function;
=[01, 20] (unit: 10Km/h).
Example: W000000,005,08
When the tracker‟s speed is over 80km/h, an SMS alarm will be sent out.
11. Movement/Geo-fence
Percentage Left =
AD value
* 100%
1024*2 –AD value

- 15 -
11.1 Movement Alarm
Command: W******,006,X
Description: When the tracker moves out of a preset circle scope, it will send an SMS alarm to the
authorized phone number for SOS.
Note:
1. X is the preset radii to the tracker‟s original place.
=0, to turn off this function.
=1, 30m
=2, 50m
=3, 100m
=4, 200m
=5, 300m
=6, 500m
=7, 1000m
=8, 2000m
2. Radii: [1, 4294967295] meter(s), suggest to be set above 100 meters.
3. GPRS command is 0x12.
Example: W000000,006,1
When tracker moves out of this circle scope, it will send out an SMS alarm.
11.2 Geo-fence Alarm
Command: W******,302,X
Description: Turns on Geo-fencing alarm. When the tracker moves in/out the preset scope, it will send an
SMS alarm to the authorized phone number for SOS.
Note:
1. X is the parameters which include: latitude, longitude, radii, in, out.
2. Latitude and longitude should be in ASCII format as follows:
Latitude is ddd.dddddd, „0‟ is needed to be stuffed if no value available. „-‟should be added for south.
Longitude is dd.dddddd, „0‟ is needed to be stuffed if no value available. „-‟should be added for west.
3. Radii: [1, 4294967295] meter(s), suggested to be set above 100 meters, if set above 8, it is
corresponding radii.
4. If In and Out are 0, corresponding function is invalid. If In and Out are 1, valid.
5. Reply as Geo-Fence Alarm.
6. GPRS exiting command is 0x12, entering command is 0x13.
7. Send W******, 302 to turn off Geo-fence function.
Example:
W000000,302,22.000000,-114.123456,3000,1,1
Remarks:
1. Only one alarm can be set in either In or Out;
2. Only one alarm can be set in either Movement Alarm or Geo-fence Alarm.

- 16 -
12. Track by Distance
Command: W******,303,X
Description: Send this command to set distance interval
Note:
1. X= [1, 4294967295], suggested to be set above 300 meters;
2. X=0, turn off.
Example: W000000,303,1000
13. Listening-in (Optional)
Command: W******,030,T
Description: Authorize a phone number to make a silent call to the tracker. The tracker will answer the call
automatically and allows the caller to listen to what is happening around the tracker. There is no sound when
the tracker is working.
Note:
1. T is phone number, Max. 16 digits;
2. If incoming call is not from authorized phone number, it will be treated as a normal call and would not
enter Listening-in status.
Example: W000000,030,138000000
14. Set Sensitivity of Tremble Sensor
Command: W******,035,XX
Description: Send this command to set sensitivity of tremble sensor
Note:
1. XX=[1,255], it will be more sensitive if XX is smaller.
2. Default value is 30.
Example: W000000,035,30
15. Output Control
15.1 Output Control (Immediate)
Command: W******,020,P,F
Description: Send this command to control the Output of VT310
Note:
P=1, Output1;
P=2, Output2;
P=3, Output3;
P=4, Output4;
P=5, Output5.
F=0, to close the output (open drain);
F=1, to open the output (low voltage).
Example: W000000,020,1,1

- 17 -
15.2 Output Control (Conditional)
Command: W******,120,ABCDE or W******,220,ABCDE
Description: Send this command to control the Output of VT310. This command is only workable when the
speed is below 10km/h(command 120) or 20km/h(command 220) and GPS is available.
Note:
ABCDE represents Out1, Out2, Out3, Out4, and Out5 respectively.
If A or B or C or D or E,
=0, to close the output (open drain);
=1, to open the output (low voltage);
=2, to remain previous status.
Example:
W000000,120,10000
W000000,220,10000
15.3 Application Examples for Outputs
15.3.1 Engine Cut
Relay Connection: Connect a relay as below picture shows:
Calculate the correct VCC value according to relay‟s parameter to comply with the following requirements:
Output open drain sink voltage (ineffective)
45V max
Output Low voltage sink current (effective)
500mA max
Normally two green wires are connected solidly (P1 and P2 are Normal Close[NC] in the relay), when output
is open (Output be low voltage), two green wires will disconnect, the engine is then cut.
Take Output1 as an example:
W000000,020,1,1 (cut engine)
W000000,020,1,0 (cancel engine-cut)
15.3.2 Connecting with Car Alarm
When the Output that connected to the car alarm is open, the alarm will start to work.

- 18 -
16. Heading Change Report
Command: W******,036,degree
Description: When the heading direction of the tracker changes over the preset degree, a message with
location data will be sent back to the server by GPRS. This enhances the accuracy when the tracker makes
a direction change.
Note:
degree=0, to turn off this function;
degree=[1,360], to set degree of direction change.
Example: W000000,036,90
When the tracker turns more than 90 degree, a message will be sent back to the server.
17. Heartbeat
Command: W******,015,data
Description: Set an interval for heartbeat.
Note:
data is the interval unit of minutes.
data=0, to turn off this function;
data=1~65535, set interval for heartbeat.
Example:
W000000,015,10
In this example, the tracker will send heartbeat every 10 minutes.
18. Track Log
18.1 Log by Interval
Command: W******,031,X
Description Set time interval for logging GPS information. Log information is stored within the device
memory. When the memory gets full, the newest record will be overwritten on top of the oldest (FIFO - First
In, First Out). In this case, only the newest information is stored.
Note:
1. X=0, to turn off this function. X=[1, 65535] to set interval in the unit of SECOND.
2. The logged message is in GPRMC format and includes:
Output 2 or Output 3 or Output 4 or Output5
Alarm

- 19 -
Date and time
Longitude
Latitude
Speed
Direction
3. All data, stored within the memory, may be exported to the PC using the USB connector. To do this, the
“GPSLog” program has to be used (please refer to GPSLog User Guide and GPRS Communication
Protocol for more information).
4. The device has 4MB of internal memory space for storing the track log. The Device is able to store up to
180,000 records within the memory.
Example:
W000000,031,60
The tracker will store GPS data every 60 seconds.
18.2 Auto Log when no GPRS
When there is no GPRS connection, the tracker can store all GPS information triggered by preset tracking
interval, alarms, request, or button activation and send this information (FIFO - First In, First Out) to server
by GPRS or preauthorized mobile phone by SMS when GPRS connection recovers.
The interval memory can store up to 1500 SMS and 4600 GPRS message.
18.3 Format Buffer
Command: W******, 503
Description: This command clears the data stored in the buffer.
Note: Deleted data can no longer be recovered
Example: W000000,503
19. Power Down
Command: W******,026,XX
Description: This command puts the tracker in power down mode when it is inactive or immobile for a
period of time. In Power Down mode, GPS stops working, GSM enters sleep mode and stops sending out
messages. The device remains in this mode until it is activated by message, incoming calls, movement, or
triggered by the button.
Note:
XX=00, to turn off this function;
XX=01~99, to turn on Power Down after a specified period of being inactive (or stationary). It is in unit of
minute.
Example: W000000,026,10
The tracker will enter power down mode after it is inactive (or stationary) for 10 minutes.

- 20 -
20. Get IMEI
Command: W******,601
Description: Get IMEI of the tracker. IMEI is 15 digits
Example: W000000,601
21. Initialization
Command: W******,990,099###
Description: This sets all settings (except for the password) back to factory default.
Note: Send SMS “Default?”to the device. Within 120 seconds, send this SMS command to the tracker.
### is the ending character and is required in the text message.
Example: W000000,990,099###
22. Password Initialization
Command: W888888,999,666
Description: This resets the password back to factory default and can be used in case you forget your
password.
Note: Send SMS “Default?”to the device, and then, within 120 seconds, send this SMS command to the
tracker to set the password back to factory default (000000).
If you have set an authorized telephone number, when the password has been successfully preset, the
telephone will receive W888888,999,666
Example: W888888,999,666
For more details regarding SMS commands, please go to Annex 1 Command List
23. Parameter Editor
The tracker can also be configured by computer using the Parameter Editor. This method is much easier and
user friendly.