Freematics OBD-II Emulator MK2 is a device that emulates a 16-pin female OBD-II port with KWP2000, ISO9141, CAN bus and J1850 data protocols. It responds to requests for standard OBD-II PIDs (including DTC and VIN) from a plugged-in OBD-II compliant device. It simulates up to 6 active vehicle diagnostic trouble code (DTC) for Mode 03, 07, 0A respectively same as what a real car has when encountering a component malfunction or fault.
This product is useful for OBD-II related application development on desk. When coupled with external data source, it can also be used to provide a standard OBD-II port for vehicles that don’t have one and thus existing OBD-II device/software can work with the vehicle.
The emulator can be controlled by GUI software via a USB cable or wirelessly via BLE by Freematics Controller app available for both iOS and Android. It can also be programmatically controlled via USB or serial UART interface for further development.
- Standard 16-pin OBD-II female port (powered)
- Implementing data bus (CAN, KWP2000, ISO9141-2, J1850 PWM, J1850 VPW) used in vehicle
- Simulating OBD-II Mode 01 PIDs (0100-0163)
- Simulating OBD-II DTC (mode 03/07/0A, up to 6 active DTCs)
- Simulating OBD-II readiness monitors
- Simulating VIN data (Mode 09)
- Control by GUI software (via USB), iOS App (via BLE) or programmatically (via serial UART or USB)
- Firmware upgrade via USB
Following protocols are implemented:
- CAN/ISO15765 500Kbps/11bit
- CAN/ISO15765 250Kbps/11bit
- CAN/ISO15765 500Kbps/29bit
- CAN/ISO15765 250Kbps/29bit
- KWP2000/ISO14230 Fast
- KWP2000/ISO14230 5Kbps
- J1850 VPW (optional)
- J1850 PWM (optional)
Please note the emulator does not actively generate CAN signals without presence of OBD device.
The emulator has following sockets on its enclosure:
- 16-pin female OBD-II port
- DC input jack
- USB port
- I/O socket
The I/O socket (6-pin socket at the side or 4-pin socket at the end) provides an interface for serial TTL connection as well as DC power supply. This makes it possible for a micro-controller like Arduino to manipulate the emulator’s states and data in real-time via AT command-set. For 6-pin socket (legacy), the pin definitions are Tx, Rx, GND, 3.3V, 5V (left-to-right). For 4-pin socket, the pin definitions are Tx, Rx, GND, 5V (left-to-right).
PC GUI Software
An open-source GUI software is developed for configuring and controlling the emulator. The Windows binary can be downloaded here. Simply extract the downloaded compressed file and run FreematicsEmulator.exe to launch the GUI.
Android and iOS App
The emulator can be remotely controlled via BLE (Bluetooth Low Energy) by Freematics Controller available as Android App (click here to download the APK) and iOS App (search Freematics Controller in the App Store).
To start using the emulator with PC GUI, follow these steps:
1. Connect DC 12V power adapter to the emulator
The emulator requires DC 12V power supply. If your connected OBD-II device will be power consuming, a power adapter with higher output current rating is necessary. The DC input socket is located beside the USB port.
2. Plug in USB cable and connect to PC
Driver is normally automatically installed on Windows 7/8/10. For Windows XP, please download the driver from here.
3. Open Freematics OBD-II Emulator GUI software and connect with the emulator
Run FreematicsEmulator.exe to launch the GUI software. Once the GUI is loaded, it will automatically attempt to connect with the emulator. Once connected, the Connect button will turn into Disconnect.
4. Plug in your OBD-II device (with OBD-II male connector) into emulator’s OBD-II female port
Now plug in your OBD-II device and it should work as if plugged in the OBD-II port of a real car. You can use the GUI to change the value of OBD-II PIDs, state of readiness monitors, diagnostic trouble code (DTC) and VIN.
To start using the emulator with Freematics App, follow these steps:
1. Connect DC 12V power adapter to the emulator
The emulator requires DC 12V power supply. Connect the power adapter to the emulator.
2. Install Freematics Controller App
Download and install Freematics Controller App on your mobile device. The app is available for Android (click here to download the APK) and iOS (search Freematics Controller in the App Store).
3. Search and connect to the emulator
Once the App is launched, it will search for nearby emulator and found devices will be listed on screen. Tap Connect button to connect and the control interface will be loaded.
4. Plug in your OBD-II device
Now plug in your OBD-II device and it should work as if plugged in the OBD-II port of a real car. You can use your Android or iOS device to adjust the value of PIDs remotely.
Serial Control Interface
The communication between Freematics OBD-II Emulator and the host device (PC or mobile devices) is done by a pre-defined text-based command set. Our GUI software is just implemented on this. If you would like to develop your own GUI software or host control hardware, please refer to Freematics OBD-II Emulator Control Command Set.
The emulator is powered by a DC power source up to 30V. A power adapter rated at 12V/1A with 5.5/2.1mm connector (center positive) can be supplied as courtesy without warranty. It is recommended however to use a DC power supply with higher rating especially when you need to use some OBD-II devices requiring high power surge. A voltage adjustable power source is useful for emulating voltage change in real cars. Please also note the input voltage bypasses to the OBD port pin 16 (battery power pin) and is unfused unless the power supply is fused.
- Freematics OBD-II Emulator MK2 x 1
- USB Cable x 1
- DC 12V Power Adapter (5.5/2.1mm) x 1
- Quick Start Guide
- Freematics Emulator GUI Software Download
- USB Driver Download
- Freematics OBD-II Emulator Control Command Set
- OBD-II PID Codes & Descriptions
- OBD-II Diagnostic Trouble Codes (DTC)
- OBD-II Readiness Monitors Explained
You can quickly place your order from this page with optional accessories for your selection or head to our online store and take your time with our range of products.