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Freematics OBD-II Emulator MK2 is world's smallest OBD-II emulator with KWP2000, ISO9141 and CAN bus simulation. It provides an 16-pin female OBD-II port which is identical to that of a real car and responds to requests for standard OBD-II PIDs from plugged-in OBD-II compliant device. It emulates up to 6 active vehicle diagnostic trouble code (DTC) as if a real car has when encountering a component malfunction or fault. Request for VIN is also responded and the VIN can be altered. The emulator connects to PC via USB cable and is operated via an easy-to-use software GUI. Secondary development is possible with serial TTL connector available for connection of interaction with Arduino or other embedded system with source of data (e.g. sensors). Freematics OBD-II Emulator is practically useful and cost effective for OBD-II related application development on desk. Once extended with external data source, it can even be used to provide an OBD-II port for vehicles that don't have a real one and thus existing OBD-II device/software can also work with the vehicle. The emulator is controlled by GUI software via USB interface. The BLE enabled version provides additional wireless control by iOS device (iPad/iPhone) with our Freematics Emulator App. Hardware Features

  • Emulating standard 16-pin OBD-II port
  • Simulating vehicle data bus (CAN, KWP2000, ISO9141-2)
  • Responding to all OBD-II PIDs polls
  • Responding to DTC and VIN requests
  • Providing both power and emulated data for OBD-II compliant devices
  • Adjusting values of all OBD-II PIDs
  • Setting diagnostic trouble code (DTC)
  • Changing vehicle identification number (VIN)
  • Switching between supported protocols
  • USB and TTL serial controlling interfaces (controlled by PC or micro-controller/Arduino)
  • Firmware upgradable
  • Embedded BLE for wireless control via iOS App
Following protocols are simulated
  • CAN 500Kbps/11bit
  • CAN 250Kbps/11bit
  • CAN 500Kbps/29bit
  • CAN 250Kbps/29bit
  • ISO9141-2
  • KWP2000 Fast
  • KWP2000 5Kbps


  • OBD-II Port: 16-pin female
  • Power Input: DC 12V
  • 6-pin XH-2.54 socket (Tx/Rx/GND/3.3V/5V/12V)
  • Support USB port



  • Freematics OBD-II Emulator MK2 x1
  • USB Cablex1
  • Wall Adapter Power Supply 12V@2Ax1

The Freematics OBD-II Emulator MK2 appears in the following collections: