TMT250 First Start

Main Page > Autonomous Trackers > TMT250 > TMT250 First Start

How to insert micro SIM card and connect the battery

  1. Unscrew 4 screws counterclockwise.
  2. Remove the cover.
  3. Insert Micro-SIM card as shown. Make sure that Micro-SIM card cut-off corner is pointing forward to slot.
  4. Connect the battery as shown to the device.
  5. Attach device cover back and screw in all 4 screws.
  6. Device is ready to be used.

  • NOTE: In order to prevent device's cover from mechanical damage it is recommended to use screwdriver, which is included in the package.


Correct Battery Connection


PC Connection (Windows)

  1. Connect device to computer using Magnetic USB cable or Bluetooth® connection:
    • Using Magnetic USB cable
    • Using Bluetooth®
      • TMT250 Bluetooth® is enabled by default. Turn on Bluetooth® on your PC, then select Add Bluetooth® or other device > Bluetooth®. Choose your device named – “TMT250_last_7_imei_digits”, without LE in the end. Enter default password 5555, press Connect and then select Done.
  2. You are now ready to use the device on your computer.

How to install USB drivers (Windows)

  1. Please download COM port drivers from here.
  2. Extract and run TeltonikaCOMDriver.exe.
  3. Click Next in driver installation window.
  4. In the following window click Install button.
  5. Setup will continue installing the driver and eventually the confirmation window will appear. Click Finish to complete the setup.

Configuration (Windows)

At first TMT250 device will have default factory settings set. These settings should be changed according to the user's needs.
Main configuration can be performed via Teltonika Configurator software. Get the latest TMT250 Configurator version from here. Configurator operates on Microsoft Windows OS and uses prerequisite MS .NET Framework. Make sure you have the correct version installed.

MS .NET requirements
Operating system MS .NET Framework version Version Link
  • Windows Vista
  • Windows 7
  • Windows 8.1
  • Windows 10
MS .NET Framework 4.6.2 32 and 64 bit .NET Framework

Downloaded Configurator will be in compressed archive. Extract it and launch Configurator.exe. After launch software language can be changed by clicking   in the right bottom corner:


Configuration process begins by pressing on connected device:


After connection to Configurator Status window will be displayed:  

Various Status window tabs display information about GNSS, GSM, I/O, Maintenance and etc. TMT250 has one user editable profile, which can be loaded and saved to the device. After any modification of configuration the changes need to be saved to device using Save to device button. Main buttons offer following functionality:

  1.   Load from device – loads configuration from device.
  2.   Save to device – saves configuration to device.
  3.   Load from file – loads configuration from file.
  4.   Save to file – saves configuration to file.
  5.   Update firmware – updates firmware on device.
  6.   Read records – read records from device.
  7.   Reboot device – restarts device.
  8.   Reset configuration – sets device configuration to default.

Most important configurator section is GPRS – where all your server and GPRS settings can be configured and Data Acquisition – where data acquiring parameters can be configured. More details about TMT250 configuration using Configurator can be found here.

Quick SMS configuration

Default configuration has optimal parameters present to ensure best performance of track quality and data usage.
Quickly set up your device by sending this SMS command to it:

"  setparam 2001:APN;2002:APN_username;2003:APN_password;2004:Domain;2005:Port;2006:0"

GPRS settings:

  • 2001 – APN
  • 2002 – APN username (if there are no APN username, empty field should be left)
  • 2003 – APN password (if there are no APN password, empty field should be left)

Server settings:

  • 2004 – Domain
  • 2005 – Port
  • 2006 – Data sending protocol (0 – TCP, 1 – UDP)

Note: Before SMS text, two space symbols should be inserted.

After successful SMS configuration, TMT250 device will synchronize time and update records to configured server. Time intervals and default I/O elements can be changed by using Teltonika Configurator or SMS parameters.


  Operate the device in suitable conditions

Do not use the device where mobile connectivity is forbidden.

  Road safety first

Comply with local traffic laws, always hold your hands on a steering wheel when using a device. Your safety is of utmost importance when you drive.


All wireless devices are sensitive to electromagnetic interference, as a result wireless devices affect the performance of each other.

  Limit the use of device in hospitals

Please follow all restrictions. Turn off the device in the vicinity of medical devices when required.

  Limit the use of device in vehicles

Please follow all restrictions. Wireless devices can interfere with other electronic equipment in vehicles.

  Be cautious near flammable materials and liquids
  Charging precautions

SELV LPS chargers, personal computers or laptops that device will be connected to must comply with the requirements of IEC 60950:2005 standard.

  Use only original batteries

Using uncertified manufacturer or different type batteries may cause an explosion.

  Use batteries safely

Protect batteries from moisture. Place them in a cool and dry place when storing. Avoid extensive operation at high temperatures. Do not attempt charging battery directly from the electrical mains. All utilised batteries shall comply with IEC 62133.

  Power supplies

Power supply circuits used to charge the device connection must have safeguards, which prevent power leakage, short circuits or incorrect electrical grounding. Any used switches ought to be installed in a readily accessible location. Power must be uninterrupted and the distance between the contacts must be 3 mm or larger.

  Remove device safely

Device must be disconnected from computer or charger by unplugging the magnetic USB cable from the device.


In order to prevent device from mechanical damage it is advisable to transport it in a shock–resistant packaging. If device stopped working properly regardless of the settings only a qualified specialist can help. It is recommended to contact your local seller or your UAB Teltonika manager in such a case.

  Use the right screwdriver

In order to prevent device's cover from mechanical damage it is recommended to use screwdriver, which is included in the package. Do not use electrical screwdrivers.