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Old 07-28-2010, 11:45 AM   #1
Registered User
Join Date: Jun 2008
Location: SA
Posts: 37
My Ride: 318i
Carputer Technical Questions

Hi Guys

I decided to embark on my first big DIY, so I need some help with some technical details. I want to install a carputer in my e46, to control basically everything - aircon, audio, cd-shuttle, pdc. It must be interfaceable to my steering wheel audio controls, and removeable when I sell the car. I also want to have a GPS module and rear view camera installed, together with Wifi and Bluetooth.

From my understanding, I will have to interface to the IBUS to gain control/intercept communication between the various devices. From what I have read, I think I am capable of designing my own IBUS interface, similar to this one:

I will install the computer system in the boot, and remove the radio and climate control systems (I'll control these via the carputer). I want to be able to view my PDC sensor distances individually on the screen something like the e60 (I think) 5 series. Also have a solid state hard drive to store music/movies with an auxilliary input somewhere near the driver (USB + 3.5mm jack). I also want to use the bluetooth as a car kit, and if possible add voice control. The GPS must allow for turn by turn navigation. If it's not too difficult, I want to read diagnostic data, and display meaningful messages (not codes) on the screen.

As far as possible, this must be a D.I.Y. i.e. I'm not going to buy a system to do this - I will build my own IBUS interface and assemble my own computer.

I need to know the following:
1. Has anyone fully reverse engineered the IBUS communication on an e46, so that I can know exactly the addresses and data formats to use to control all the OEM equipment?
2. What carputer software is good to use for all the specs listed above? Ideally I don't want to use windows xp and have to browse through the start menu depending on the function I require. There should be some sort of front-end with big buttons and must be easy to use.

yusufm786 is offline   Reply With Quote
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