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Freematics OBD-II UART Adapter MK2

Freematics OBD-II UART Adapter MK2 - Sensors & Modules - The Pi Hut - 1
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£ 48.00


Freematics OBD-II UART Adapter MK2 is the second generation of our popular OBD-II UART Adapter for Arduino. It works as data bridge between a car’s OBD-II port and Arduino with easy-to-use Arduino library provided. Besides OBD-II data access, it also integrates 6-axis MEMS sensor module and voltmeter for measuring vehicle battery power. The adapter draws power from OBD-II port and convert it to 5V (up to 2A) for powering itself and attached device (Arduino board, shield or other components).
The adapter plugs into the OBD port usually located under the steering column or slightly to the left of it. To check if your vehicle is OBD-II certified, open your hood and find the sticker that looks like this:


Note: Vehicles using following vehicle protocols are supported:

CAN 500Kbps/29bit
CAN 250Kbps/29bit
KWP2000 Fast
KWP2000 5Kbps

This version 5V-10W is for cars with both 12V & 24V batteries.


  • Supporting CAN bus & KWP2000 protocols
  • Built-in MPU-6050 MEMS module (accelerometer, gyroscope & temperature)
  • Built-in voltage meter for measuring car battery voltage
  • Serial UART data interface for micro-controllers
  • Micro USB port for computer/tablet OBD-II access and firmware upgrade
  • Compatible and extended ELM327 AT command-set 
  • Fast (up to 100Hz) read-out of OBD-II PIDs available with vehicle’s ECU 
  • Reading multiple (up to 8) OBD-II PIDs from a single query
  • Reading and clearing vehicle diagnostic trouble code (DTC)
  • Powering attached devices with DC 5V (up to 2A)
  • Arduino library and sketches available 


  • Output Power: 5V@2A-10W
  • Weight:94g