CPJex(CarPc Joycon EX) converts steering wheel controls into USB keyboard and HID remote controller.
You can control MediaPlayer, Winamp or front-end(ex. CentraFuse) with your steering wheel controls.

 

Hardware feature
- Converts resistance-output steering wheel remote controller into USB HID keyboard and HID remote controller.
- Works same as standard USB HID keyboard and HID remote controller by hardware.
- 24V tolerant 4 channel resistance input.
- Supports 28 physical buttons, 52 programmable logical buttons.
- 2 logical button for one physical button, up to 5 simultaneous key strokes by one button.
- 2 programmable LED port.
- Remote wake-up(resume PC from sleep with steering wheel remote controller).
- Temperature range : -40 ~ +85°C

JoyCon Explorer aided feature
- Preset change by Preset up and down buttons.
- Speech and OSD when preset is changed.
- Application link(application launches and popup with preset changing).
- Speech when application launches and a button is pressed.
- User definable Button Speech
- Automatic Button Detection
- Online firmware update.

- No external power or driver installation needs.
- Available OS : Windows 7, Vista, XP, 2003
(JoyCon Explorer supports Windows XP and the later version. JoyCon Explorer does not support Linux. But CarPC JoyCon EX works on Linux and Mac after it is configured at Windows.)

App Link enables to launch application with steering wheel remote control's button and switch application when preset is changed.

http://www.changjack.com/software/Jex_Setup_XP(101020).zip
http://www.changjack.com/software/Jex_Setup_Win7(101020).zip

Connect two wires of CarPC JoyCon EX’s input channel to the remote controls, and connect USB.

This is the typical resistance-output steering wheel remote controller's circuit.
You can put additional buttons like green box below by DIY, if you want.

You can control two external LED.

UserGuide
http://www.changjack.com/user_guide/cpjex/CarPC_JoyCon_EX_UserGuide_eng.pdf

You can use typical USB cam as rearview camera with CarPC JoyCon EX.
Any USB camera or video capture device can be rearview camera. 


Rearveiws popups when Channel C detects reversing light,


Jex Cam shows when reversing light is detected.
Any video capture device can be rearview camera.
Horizontal and Vertical Mirror is supported.

This video shows rearveiw test with USB camera.

Boot trouble of previous version with some Intel ITX mainboard(D945GCLF2) and USB hub was solved.

How to use Steering wheel remote controls in Centrafuse
Using remote controls both for Car Audio and CarPC

Supported cars(reported so far):

Alfa Romeo 156 2.0 JTS
Chevrolet Captiva
Chevrolet Cavalier
Citroen Xantia
Citroen XSARA 1997-2000
Dodge Durango
Fiat GrandePunto
Ford Fiesta
Ford Focus
Ford Mondeo
Ford Ranger(Cruise control only)
GM Cadilac Escalade 2002
GM Daewoo all model
Honda CRZ
Honda Ridgeline
Hyundai all model(except Sonata2/3, Marcia, Santamo)
KIA all model
Land Rover Discovery 4
Mazda3 2004-2009
Mitsubishi 380GT 2006
Nissan 350Z
Nissan Cube
Nissan Murano
Nissan Navara 2007
Peugeot 806
Pontiac Firebird 96
Renault Samsung SM5/7(Audio controller only)
Rover
SAAB 9-3 9-5
Scion TC 2006
Subaru Impreza
Toyota Camry 2005 - 2010
Toyota Corolla 2004(Cruise control only)
Toyota Corolla 2009-2010
Toyota Land Cruiser 2004
Toyota Landcruiser 200 series ( 2007 – 2010)
Toyota Lexus 330
Toyota supra 1990
Toyota Yaris
Vauxhall Astra G 1998-2004
Vauxhall Vectra 1999-2002
Vauxhall Vectra B 1996-2002
Vauxhall Zaffira A 1998-2005
and many other cars with resistive steering wheel controls

Supported remote controller:
Sony RM-X2S

Sony RM-X11M