Main principles of GPS tracking device

Most people are familiar with the phrase GPS tracking device and what its main purpose is. However, not many people know what are the main principles of GPS tracking device. Therefore, we give you a short introduction to the main principles of GPS tracking device.

GPS module

GPS module is used for pinpointing the location of the device and also to synchronize the device time. If the device time drifts for more than 3 seconds from the GPS time, the device is resynchronized to it. This allows to be sure that the device records in server represents events that were happening at that exact time. GPS modules constantly outputs information packets to microcontroller containing information such as speed, altitude, longitude, latitude and the quality of the GPS signal.

Communication part

GSM module is the link connecting GPS tracking device with the world. For this to happen the user has to insert a working SIM card to device. The communication consists of two main functionalities:

  1. GSM communication. GSM connection is established when working SIM card is inserted and there is available operator for it to connect to.
  2. GPRS communication. GPRS connection is used for device communication with server.

Record saving

Before every record is sent to server it is stored in device flash memory (Or SD card if inserted). In most of the cases the device will sent its records to the server, get the acknowledgement that records are received and then delete them.


Accessories are peripheral devices that are used to increase functionality of GPS tracking device. For example, with the help of various accessories you can monitor temperature in different trailer compartments, register and identify drivers, monitor fuel level directly from the fuel tank, track trailer door opening and closing events and many more.