How to Setup MT78 via USB Config Tool

Contents

MT78 Can be programmed via USB Cable, SMS. This post will show you how to setup your MT78 via the USB Config Tool.

Install SIM Card

Prepare one Micro 3FF SIM card.
Insert the SIM card into the slot with the cut corner oriented correctly, with the contacts facing up.

Warning!
Make sure SIM Card direction is correct or maybe broken the sim card slot.

Power ON

After installing the SIM card, press the power button twice to turn on the device.
The MT78 will power on automatically, and the blue LED will light up.

Download Config Tool

Click h e reto download the “MT78_Config_Tool_User_Guide” to your PC;
Unzip all of them to the same folder;

Please make sure to unzip them into the same folder, or the commands will be lost in the SSCOM tool.

Install GPS Driver

Click the “GPS Driver” and install it.

Connect to Tracker

Connect the USB Config Cable (NOT USB Charging Cable)between the PC and MT78

Please make sure to use the “USB Config Cable,” or it may not be recognized.

The MT78 Config cable is customized and not the standard cable on the market. so please make sure to connect the MT78 with the MT78 config cable.

Check Com Port

You can open Device Manager (press the Windows button then type ‘device’).

Right-click the “Windows Start” ;
Select the “Device Manager”;
Click “Port (COM & LPT) and confirm Port number (“USB-SERIAL CH340 (COM15)“

In the image above COM15 disappears when I unplug my USB Config cable, so COM15 is the port I need to choose on sscom tool.

If Insert the USB Config Cable and show “PL2303HXA PHASED OUT” please check this article to fix it.

SSCOM tool

Open “sscom” tool
Select the Comm Port number that shows on “Port (COM & LPT)” (step 1)
Choose the BaudRate 115200 (step 2)

The Default BaudRate is 115200, it can’t work at other baudrate.

Click “OpenCom” (step 3 in picture)
Click “EXT” (step 4 in the picture)

Do not select “ AddCrLf ” on the sscom tool, or send the commands will fail.

Send Commands to Tracker

Now you can send the commands to GPS Tracker MT78.

Click “START” comamnd it will show the config info
Input the correct SIM Card APN and then click “APN”
Input the IP and Port and then click “IP/Port” etc.
In put the ACC ON/OFF report interval time

Commands List

Item	Command format	Example	Reply
Start	AT%TEST=START	AT%TEST=START	OK
APN	AT%TEST=SMS[][apn,123456,cmnet]	AT%TEST=SMS[][apn,123456,cmnet]	OK
IP/Port	AT%TEST=SMS[][IP demo.tracccar.org 5013]	AT%TEST=SMS[][IP demo.tracccar.org 5013]	OK
ACC ON	AT%TEST=SMS[][FREQ,123456,30]	AT%TEST=SMS[][FREQ,123456,30]	OK
ACC OFF	AT%TEST=SMS[][STATIC,123456,30]	AT%TEST=SMS[][STATIC,123456,30]	,OK
Sleep	AT%TEST=SMS[][sleep,123456,5]	AT%TEST=SMS[][sleep,123456,5]	OK
Heartbeat	AT%TEST=SMS[][HBT,123456,60,7200]	AT%TEST=SMS[][HBT,123456,60,7200]	OK
Change password	AT%TEST=SMS[][password,123456,771700]	AT%TEST=SMS[][password,123456,771700]	OK
Reboot	AT%TEST=SMS[][CQ]	AT%TEST=SMS[][CQ]	OK
Reset	AT%TEST=SMS[][NVFORMAT]	AT%TEST=SMS[][NVFORMAT]	OK
Exit	AT%TEST=STOP	AT%TEST=STOP	OK

MT78 USB config commands list

FAQ

I can’t find the com port number on sscom tool, what happens?

Make sure the “GPS Driver” is installed on your PC. If installed and then check if connect the tracker with the USB Config cable and NOT the Charging cable.

Why do I get the alert “USB Device not recognized”?

If get the alert when you connect the USB cable to the PC, please check if you use the MT78 Config cable (this is the customized cable not standard)

The MT78 ONLY works with the Config cable.

The USB Config cable is connected and tries to send the command but no response?

Maybe the battery is low pls check if the LED is light.

How do I query the current setting?

There are two ways to check the settings:
1. SMS command: CXZT
2. USB command: AT%TEST=START

Updated on December 29, 2025

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