This Arduino based DIY kit is ideal for putting up a customizable vehicle telematics data logging device with OBD-II/GPS/G-force data data logging, live data display and Bluetooth SPP and BLE wireless connectivity. The whole setup is powered by OBD-II port. Our actively maintained Arduino sketches and libraries for this kit make it easy-to-go and ready-to-hack. The kit consists of following parts:

  • Freematics OBD-II Adapter for Arduino
  • Bluno MEGA 1280 board
  • Telematics Shield for Arduino MEGA (with 3.5″ TFT LCD touch display, microSD seat and I/O sockets)
  • 10Hz GPS/GLONASS Receiver for Arduino

Parts of Advanced Telematics Kit

Arduino Board

The kit comes with a Bluno MEGA 1280 board (Arduino MEGA 1280 + BLE) which directly works with Arduino IDE. It’s BLE (Bluetooth Low Energy) feature allows simple wireless data exchange with iOS and Android devices.


BLE USB Dongle

With a dedicated BLE USB dongle, you can perform wireless serial communication easily with the Bluno board from a computer. More interestingly, you can upload sketch to the Bluno board via BLE without a USB cable.


Telematics Shield

Together with DFRobot, We developed a Arduino Mega shield dedicated for telematics applications. The shield features a 3.5″ 480×320 color TFT LCD, a microSD card seat, and 4 I/O sockets for connecting OBD-II adapter, GPS receiver and additional devices. More technical information about shield is available here.

dfr0387kit3-lcd35-2 kit3-lcd35-1

Telematics Shield with 3.5″ LCD (R61581 controller)


OBD-II Adapter

The kit comes with Freematics OBD-II UART Adapter V2 which provides access OBD-II data and built-in MPU-6050 motion sensor.



OBD-II adapter and GPS receiver are both connected to the Telematics Shield via 2 of 4 I/O sockets. For I2C version of the OBD-II adapter, the 4-pin connector (marked I2C) goes into I2C socket on the Telematics Shield. For UART version, the 4-pin connector (marked Serial1) goes into Serial1 socket. The 4-pin connector (marked Serial2) from GPS receiver goes into Serial2 socket. That’s it. Guess you can’t mess it up.


telematics_shield_socketsOBD-II adapter line definition:

  • Red: VCC (5V)
  • Black: GND
  • Green: SDA
  • White: SCL

GPS connector line definition:

  • Red: VCC
  • Black (thick): GND
  • White: Tx (to Arduino Serial2 Rx)
  • Black: Rx (to Arduino Serial2 Tx)


Arduino Libraries

Following libraries are provided for using the kit.


Arduino Sketch

MegaLoggerHD is an Arduino sketch developed for the kit working as a OBD-II, GPS and 6-axis MEMS data logger with live display. Please make sure to import all libraries in the repository before compiling the sketch. Refer to Developers Guide for some instructions.

megaloggerHD_configSketch loaded in Arduino IDE

Kit3_assembled_1Sketch uploaded running on the assembled kit


What does this kit do out-of-box?

  • Obtain, display and record OBD-II data
  • Obtain, display and record GPS data
  • Obtain, display and record MEMS sensor (accelerometer, gyroscope, temperature sensor) data
  • Transmit collected data to computer via USB
  • Transmit collected data to mobile device wirelessly via BLE (Bluetooth Low Energy)


How to view logged data?

When loading with MegaLogger sketch, all vehicle data is logged on microSD in this format. As it is a text based format, it is easy to manipulate the data with some data processing software.

The easiest way to view the logged data is using Freematics Data Charting Service (might be under maintenance currently), an online service which renders data log file into interactive chart and map in your web browser.



If you prefer to do everything offline, Data2KML is provided as an open-source utility for converting data log file to KML format which can be loaded by Google Earth.

Wollongong Mount Dash




Shipping List

  • Freematics OBD-II UART Adapter V2 *1
  • Bluno MEGA 1280 Board *1
  • Telematics Shield * 1
  • M8030 GPS Receiver *1
  • MicroUSB Cable *1
  • BLE USB Dongle (limited time bonus offer) *1




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