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First of all, before using this product, we need to know that this is a vehicle GPS tracking units, so we need to connect the product to the vehicle power supply for use. Of course, most of the cheap GPS tracking unit also will install the built-in battery in advance, which will help the customer to configure or test by computer before installing the device on the vehicle.

gps vehicle tracking unit

Then we need to understand that the GPS vehicle tracking unit can be connected to the computer via a USB cable for testing or we can set functions via SMS.

The following is the basic operation flow by SMS set after getting the device:

(1)Before insert a SIM card on GPS tracking units for trucks or car, please make sure the SIM card has GPRS Service, (Caller ID Display, send /receive SMS function.).

cheap gps tracking unit

(2)After insert SIM card, please ensure that the GPS antenna is not covered by metal. If we are testing indoors, we need to place the vehicle GPS tracking units at the window because there is no GPS signal coverage inside the room. After 1 minute if the GSM indicator and GPS indicator flash (0.1 seconds on and 2.9 seconds off), you could do as followings to set by SMS command. (All “******” below are device password, the default password is 000000 )

A: Enable GPRS Tracking

Description: Enable GPRS tracking function.

The SMS command format is W******,013,X


X=0, to turn off GPRS tracking (default);

X=1, to enable GPRS tracking via TCP;

X=2, to enable GPRS tracking via UDP.

Normally we choose X=1, enable GPRS Tracking via TCP for VT600 series product.

Example : W000000,013,1

Device reply: Open TCP ok

B.Set GPRS Time interval

The SMS format is W******,014,X

Description: Set time interval for sending GPRS packets.

Note Set time interval for sending GPRS packets.

X should be in the decimal string and in-unit of 10 seconds.

X=0, to turn off this function;

X=1~65535, the time interval for sending GPRS packet and in-unit of 10 seconds.


The tracker will send every 60 seconds

C.set APN

The SMS command format is W******,011,APN,Username,Password 

Description: Set APN details for the tracker


(1)APN username and password are optional. If no APN username and password is required, just input APN


(2)APN is the APN of the SIM Card which inserts on the device.


Device reply: Set APN ok/CMNET

D.Set IP and Port

The SMS command format is W******,012,IP,Port 

Description: Set the IP and Port of tracker for GPRS communication.

(1)IP is your server’s IP or the domain name.

(2)Port: [1,65534]


Our platform IP is or (set data to the domain is recommended), Port is 8011 if you are

using our platform for testing, the SMS command is :


Device reply: Set IP OK/,8011

gps tracking units for trucks

After the above four settings are completed, the vehicle GPS tracking units can be used normally, and then we can set other functions of the product according to our own needs.

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    Technical Support: Magic Lamp