CPJexd(CPJexd) 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.

CPJexd includes all the function of Exr

Hardware feature
– Converts resistive and digital steering wheel remote controls into USB HID keyboard and HID remote controller
– Resistance range adjustable

– Supported digital steering wheel remote controls :
BMW IBUS, AUDI ‘99-’04 (LIN), VW ‘99-’04 (LIN), Renault Clio, Hyundai(digital, Sonata2/3, Marcia,
Santamo), Renault SM (digital), Volvo XC70 ‘03

– Works same as standard USB HID keyboard and HID remote controller by hardware
– 24V tolerant 4 channel resistive(voltage) input
– Supports 28 physical buttons, 52 programmable logical buttons
– Long and Short 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 controls)
– Channel Master/Slave selectable
– Supports J2P BUS peripherals(BSGr, CPJ MIX)
– Phone/Mute signal output
– Supports BSGd(Button Signal Generator digital) : Controls genuine car radio
BSGd emulates BMW IBUS, AUDI ‘99-’04(LIN), VW ‘99-’04(LIN)
– Remote signal output for CPJ MIX
– Temperature range : -40 ~ +85°C

Manager feature(for Windows PC)
– Preset switching by buttons.
– Application Launcher(application launches and pops up with preset switching).
– Voice and OSD by button and preset switching.
– User definable button voice and OSD.
– Rearview by reversing light
– Online firmware update.
– No external power or driver installation needs. (External power is optional.)
– Available OS : Windows 8, Windows 7, Vista, XP, 2003

Interface Manager supports Windows XP and the later version.
Interface Manager does not support Linux, Mac. But CPJexd works on Linux and Mac after it is configured at Windows.
Interface Manager does not support Android devices. But CarPC Interface Exd works on Android devices (from Android version 3.1) after it is configured at Windows.

You can control Android device with steering wheel controls by CPJexd.
Android 3.1 or later version is required to use CPJexd in Android.
How CPJexd works in Android

Supported cars(reported so far):

Digital steering wheel controls
BMW IBUS(eg. E39 E46 E45 E38 E36 E37 E38(Z3) E53 E83, X3, X5)
AUDI ‘99-’04 (LIN)
VW ‘99-’04 (LIN)
Renault Clio
Peugeot 206 307 406
Peugeot 306
Ford Mondeo MK2 ‘96-’00
Hyundai(digital, Sonata2/3, Marcia,Santamo),
Renault SM (digital)
Volvo XC70 ‘03

Resistive steering wheel controls
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 Fusion 2010
Ford Mondeo
Ford Mondeo MK2 1996-2000(Resistive PCB is required)
Ford Ranger(Cruise control only)
GM Cadilac Escalade 2002
GM Daewoo all model
Honda Civic 2007 Type R (Euro version)
Honda CRZ
Honda Ridgeline
Hyundai all model(except Sonata2/3, Marcia, Santamo)
KIA all model
Land Rover Discovery 4
Mazda MX-5 2007
Mazda3 2004-2009
Mitsubishi 380GT 2006
Mitsubishi NATIVA/MONTERO/PAJERO SPORT 2010
Nissan 350Z
Nissan Cube
Nissan Murano
Nissan Navara 2007
Peugeot 306(Resistive PCB is required)
Peugeot 806
Pontiac Firebird 96
Renault Samsung SM5/7(Audio controller only)
Rover
SAAB 9-3 9-5
Scion TC 2006
Subaru Impreza
Subaru Liberty 2006
Suzuki Grand vitara 2006-2010
Suzuki SX4
Toyota Camry 2005 – 2011
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-X4S
Sony RM-X11M

Manager
https://www.exinterface.com/manager/

User Guide
https://www.exinterface.com/d/man/cpjexd/CPJexd_UserGuide_eng.pdf