GPS Tracker TK102 Manual




Thank you for purchasing the TK102. This manual shows how to operate the device smoothly and correctly. Make sure to read this manual carefully before using this product. Please note that specification and information are subject to changes without prior notice in this manual. Any change will be integrated in the latest release. The manufacturer assumes no responsibility for any errors or omissions in this document.


Summary ———————————————————————————- 3

Application ——————————————————————————— 3

Hardware description    ———————————————————————- 3

Front face ————————————————————————————- 3

Rear face ————————————————————————————- 3

Side face ————————————————————————————– 3

Bottom face ———————————————————————————– 4

Interior ————————————————————————————— 4

Specifications ——————————————————————————— 4


SIM card installation ———————————————————————– 5

Battery and Charger ———————————————————————— 5

Quick Startup ———————————————————————- 6

Initialization and RESET tracker——————————————————– 6

Change the password ———————————————————————- 6

Authorization ————————————————————————– 7

Real-time polling ———————————————————————— 7

Auto track ——————————————————————     8     

Voice Surveillance ———————————————————————— 8

Modes switch between “track” and “monitor” ————————-     8

Geo-fence ———————————————————————– 8

Movement Alert ———————————————————————–     9

Over speed Alert ———————————————————————- 9

IMEI Check ———————————————————————- 9

SOS Button ——————————————————————– 10

Low battery alert ——————————————————————– 10

Hidden number tracking    ——————————————————– 10

SMS center ——————————————————————– 10

GPRS setting ——————————————————————– 11

Cautions ——————————————————————— 11

Faults & Solutions ——————————————————————— 11


Working Based on existing GSM/GPRS network and GPS satellites, this product can locate and monitor any remote targets by SMS or internet.


Vehicle rental / Fleet management etc.

Protect child / the old / the disabled / pet etc.

Provide peace-of-mind for businessmen

Manage personnel

Track criminals secretly

Hardware Description

Front face 3.2 Rear face



64mm x 46mm x 17mm(1.8″*2.5″*0.65″)
850/1800/1900Mhz or 900/1800/1900Mhz
SIRF3 chip
Siemens MC55 or Siemens MC56
Cold status 45s
Warm status 35s
Hot status 1s
12—24V input
5V output
110?220V input
5V output
Chargeable changeable 3.7V 800mAh Li-ion battery
-40°C to +85°C
-20°C to +55°C
5%–95% non-condensing

SIM card installation

Make sure that there is no call transfer and call display is on, and PIN code off. The SMS message must in Text format, can’t be identified for PDU format.


1 Open the rear cover, and pick out the battery.

3 Put the SIM card into the holder, and turn the foil right and fasten it in place.

Battery and Charger

Do charge the battery to capacity in 8 -12 hours for first use. Please use the battery and charger provided by the manufacturer. This unit adopts built-in Li-ion battery, and full battery will support around 48 hours use on end. After first use, the battery can be charged fully in 3-5 hours.


a: For it’s Li-ion battery, which contains harmful chemicals and may burst, please don’t bump, puncture it violently and keep it off fire.

b: Please charge the battery in time to keep it working normally.

Start up

Put the SIM card and battery in place.

Turn on the unit outdoors by pressing the “on/off” button until the indicator is on.

For first use, please initialize the unit and restore it to default setting.( please refer to 5.4 for instruction.)

In 10 or 40 seconds, the unit will begin to work and acquire the GSM signals as well as the GPS signals.

The indicator will keep flashing every 4 seconds when the unit has received the signals, otherwise it will keep on.

When this unit receives GPS signals normally, you can use it and do all the following



Send “begin+password” in SMS to the unit, it will reply “begin ok” and initialize all the

settings. (default password: 123456) The instruction “begin+password” is also suitable

to reset the tracker to its basic settings. If it seems, your tracker is “damaged”, it could also be because of wrong settings! Try to reset and to start the initialization again.

Change the password

Send SMS password+old password+space+new password to change the password.


5.5.1 Be sure keep the new password in mind, you have to upload the software to restore the original setting in case of losing the new password.

5.5.2 Make sure the new password is in 6 digits, or else the tracker can not recognize the password.


There are only 5 numbers able to be authorized.

5.6.1 Call the tracker for 10 times, it will make the cell phone number as the authorized number automatically.

5.6.2 Send SMS admin+password+space+cell phone number to set up a authorized number. The other authorized numbers should be set by the first authorized number. If the number is successfully authorized, the unit will reply “admin ok!” in SMS.

5.6.3 Send SMS noadmin+password+space+authorized number to delete the authorized number.

5.6.4 For roaming purpose, you have to add your country code ahead of the cell phone number, for example, please send admin123456 008613322221111 to tracker to set 13322221111 as an authorized number.

Real-time polling

5.7.1 If there is no authorized number, when any number dials up the unit, it will report a Geo-info; If there is already an authorized number, then it will not respond when an unauthorized number calls it up.

5.7.2 When an authorized number dials up the unit, it will hang up and report a real-time Geo-info as below:

Auto Track

Report a Geo-info at 30s intervals to the authorized numbers for 5 times:

5.8.1 Set up: Send SMS t030s005n+password to the unit, it will report the Geo-info at 30s intervals for 5 times.(s: second, m: minute, h: hour). The setting must be in 3 digits and at maximum 255 in value.

5.8.2 Send SMS t030s***n+password to the unit, it will reply SMS heaps of times

5.8.3 Cancel: Send notn+password to delete the ” auto track ” Remark: the interval must not be less than 20s.

Voice Surveillance

In this mode, the user can dial up the unit to monitor the voice (please refer to 5.10 for instruction).

Modes switch between “track” and “monitor”

5.10.1. The default mode is “track”.

5.10.2. Send SMS monitor+password to the unit, and it will reply “monitor ok!” and switch to “monitor”mode.

5.10.3. Send SMS tracker+password to the unit, it will reply “tracker ok!” and restore to “track” mode.


Set up a geo-fence for the unit to restrict its movements within a district. The unit will send the message to the authorized numbers when it breaches the district.

5.11.1 Set up: When the unit stays immobile in a place for 3-10 minutes, the user can Send

SMS stockade+password+space+latitude,longitude; latitude,longitude to unit to set the restricted district. In case of breach, it will send SMS “stockade!+geo-info” to the authorized numbers.

Remark : The first latitude&longitude is coordinate of the top left corner of the Geo-fence, while the second latitude&longitude is the coordinate of the bottom right corner. It will alarm one time in each setting.

5.11.2 Cancel: Send SMS nostockade+password to deactivate this function.

This function will be out of effect after the unit moves outside the district.

Movement alert

5.12.1 Set up: When the unit stays immobile in a place for 3-10 minutes, the user can send SMS move+password to the unit, then the unit will reply “move ok!”. In case of such a movement, it will send SMS “Move” along with a Geo-info to the authorized numbers. It will alarm one time in each setting.

5.12.2 Cancel: Send SMS nomove+password to deactivate the movement alert.

Remark: This function will be out of effect after the unit moves outside the district.

Over speed alert:

5.13.1 Set up: Send SMS speed+password+space+080 to the unit (suppose the speed is 80km/h), and it will reply “speed ok!”. When the target moves exceeding 80 km/h, the unit will send

SMS speed+080!+Geo-info to the authorized numbers. It will alarm one time in each setting.

5.13.2 Cancel: Send SMS nospeed+password to deactivate the overspeed alert

Remark: It is recommended that the speed alarm is set at not less than 50km/h. For below that rate, it may cause the excursion of the GPS signal influenced by clounds etc.

IMEI checking:

Send SMS imei+password to the unit to check the IMEI number.

SOS button

Press the SOS for 3 second, it will send ” help me !+ Geo-info” to all the authorized numbers every 3 minutes. It will stop sending such a SMS when any authorized number reply SMS “help me!” to the tracker.

Low battery alert

It begins to alert when it is 3.7V and sends you SMS in 30m interval.

SMS format: low battery+Geo-info.

Hidden number tracking

When a hidden authorized number calls the tracker, the tracker will reply SMS with the hidden number&Geo-info to all the authorized numbers.

5.17.1 Send SMS “hide number” to set up the hidden number.

5.17.2 Send SMS “nohide number” to delete the hidden number.

SMS center

5.18.1 Send SMS adminsms+password+space+cell phone number to set the SMS center. If the SMS center is set up, when an authorized number sends SMS to the tracker, the tracker will reply a SMS with Geo-info & authorized number to SMS center.

5.18.2 Send SMS noadminsms+password to cancel the SMS center.

Response SMS format: authorized number+Geo-info

GPRS setting

In order to use GPRS function, the user needs to set IP, Port and APN ( access point name ) by either cell phone, or our PC software.

5.19.1 Set an IP address and port:

Setup: Send SMS adminip+123456+space+IP address+space+port.

If setup successful, the tracker will reply SMS adminip ok

Cancel: Send SMS noadminip+123456

5.19.2 Set APN

We will offer a PC compatible software for you to set the APN. Please refer to the instruction of how to use our PC software

As soon as the IP & Port & APN are set up, the user can make a call or send SMS to tracker.

The tracker will hand up the telephone and report the coordinates to IP address.

The message sent by tracker to IP address is as following:

Serial number + authorized number + GPRMC + GPS signal indicator + command + IMEI number + CRC16 checksum.

For example, it will send GPS coordinates as below illustrated


Please comply with the instructions to extend the unit life:

Keep the unit dry. Any liquid, i.e. rain, moisture, may destroy or damage the inside circuitry.

Don’t use & store the unit in dusty places.

Don’t put the unit in overheated or over cooled places.

Handle carefully. Don’t vibrate or shake it violently.

Clear the unit with a piece of dry cloth. Don’t clean in chemicals, detergent.

Don’t paint the unit, this may cause some foreign materials left in between the parts.

Don’t disassemble or refit the unit.

Please use the battery and charger provided by manufacturer. Using other batteries and chargers will cause unwanted situation.

Don’t dismount the antenna randomly, or use other antennas. This may interfere the transmission, and increase the radiation as well.

Faults & The solutions


Check the battery and see if it is fully charged or correctly installed.

In existence of an authorized number, an unauthorized number dials up the unit. Please initialize the unit and re-set up the authorized numbers.

Check if the authorized number is setup or in the coverage of signals.

Don’t use it in the place beyond reach of signals. Place the

unit outdoors, especially when starting it up.

Recent Comments

  1. If I did not receive SW CD from the seller, is it possiable to download? Thannx

  2. I was found a Free website which looks good and support this model. It’s easy to use and no device limit. You can follow your devices in real time and check historical tracks also. I hope everybody will find it useful. You find the site here:

  3. hi
    my device sends me the location ,but i camt do resret factory beaccuse it doesnt send me any sms.
    please help me
    thank you

  4. czesc u mnie nic nie dziala , nie moge jej uruchomic – prosze o pomoc

    • Miałem ten sam problem, najpierw trzeba ustawić APN komendą apn+password+spacja+networknae, np: apn123456 orange (powinna wrócić odpowiedź apn ok!
      Później trzeba ustawić numer telefonu adminstracyjnego
      powinna wrócić odpowiedź admin ok!

  5. But nothing comes up

  6. Hello,
    i setup the settings, and when i call the tracker, he send me long and lat as “0”. Where I’am wrong?

    • Did you get help on this problem? The same thing is been happening to me..

      • Raul, this usually indicates that the tk102 device has poor GPS signal and cannot get an accurate fix…

        It is crucial that the device be tested before use in optimum functioning conditions (outside under clear blue sky and in an area where you know you have full GSM signal).

  7. Francisco Montes de Oca

    What is the margin of error?

  8. If I have accidentally pressed SOS button and do not have tracker with me how do I stop it from sending me help text every 3 minutes. Thanks

  9. How do I change the date on the tracker? I have managed to change the time but there is nothing about changing the date

  10. I am getting Username/ password error . But i did not change the password. Pls let me know how to recover my password..?

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