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Thread: E31 I-Bus protocol?

  1. #26
    Join Date
    Jul 2009
    Location
    Del Mar, CA
    Posts
    742
    My Cars
    91 850i, 01 740i, 06 760
    I've been using my Raspberry setup for about a year and a half now. My biggest regret was mounting everything up behind the glove box which made it very difficult to service/modify.

    So I repackaged it this weekend and mounted it to the upper glove box. Now it is very easy to access/service and the audio is now free of alternator whine which was unexpected!

    Below is the HD Radio module, Raspberry Pi and sound card along with my diagnostic interface (built around an Arduino).



    Last edited by BMSman; 12-23-2018 at 11:12 PM.

  2. #27
    Join Date
    Nov 2012
    Location
    OC, CA, USA
    Posts
    127
    My Cars
    '97 840Ci, '02 X5 4.6is
    Do you like your "HD Radio" module? I have got DMHD-1000 and it is far from perfect. Looks like it does not have any buffering for HD radio.
    So when signal is not very strong and the car is moving it sometimes looses HD signal and switches back to analog, a couple of seconds later it catches HD signal again and switches back to HD. It is very noticeable and annoying. I wish it had analog only mode option for weak stations.
    WBR, Tony

  3. #28
    Join Date
    Jul 2009
    Location
    Del Mar, CA
    Posts
    742
    My Cars
    91 850i, 01 740i, 06 760
    Yes I'm using the same module and it has the same problem you describe but only on weak signals, most of the time it is fine on the stations I listen to. I only drive the car once a week to work and back and usually only listen to a couple of stations. I bought a couple of these on Ebay for not much money and am generally very pleased with them.
    Last edited by BMSman; 12-23-2018 at 11:58 PM.

  4. #29
    Join Date
    Mar 2013
    Location
    Aventura, FL
    Posts
    49
    My Cars
    1993 BMW 850Ci
    Hi BMSman,

    Nice Job with the the Raspberry PI and the setup, interesting the approach you took on the project.

    I just saw this thread for the first time today had I seen it sooner I would have contributed from another BMW enthusiast with a e46. His name is Trent Seed he had files on github with the e46 codes with a Rasberry pi running Linux with Reslers usb device connected to a Android Tablet via bluetooth. Java app on the android

    The UI was very basic but there was alot of coding completed. The code values for the iBus I think are different for the e46 than the e31.

    I believe he took the project to a certain level and stopped working on it. I tried reaching out to him via email to see if he was interested in doing additional coding and paying him a reasonable fee but never got a response.

    I am not a programmer but am an IT consultant so I enjoy the techie stuff.

    I reached out to a friend of mine who is a programmer to assist in my project will create anew thread once I have made some progress.

    If you want send me a PM and we can chat

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