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Thread: Doing more with OBD

  1. #21
    Newbie
    Join Date
    Oct 2006
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    5
    Connecting a PIC to the ELM327 is fine with me... I guess I just need to sit down and do a little research on how to interface the two together in a standalone unit.

    Thanks again for all the help!
    -Chris

  2. #22
    Maximum Bitrate
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    May 2006
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    Seattleish, WA
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    Quote Originally Posted by srracer View Post
    Connecting a PIC to the ELM327 is fine with me... I guess I just need to sit down and do a little research on how to interface the two together in a standalone unit.
    Are you looking to code in assembly or C?

    Here's a GREAT set of tutorials on PIC programming and interfacing:
    http://www.winpicprog.co.uk/pic_tutorial.htm

    #7 is all about interfacing with RS-232:
    http://www.winpicprog.co.uk/pic_tutorial7.htm
    :: Mark

  3. #23
    Newbie
    Join Date
    Oct 2006
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    I know C - Assembly I'd have to learn. But I'd love to be able to build this out of parts that are dirt cheap - which would lean towards using an cheap off the shelf microprocesser and force me to learn assembly I suppose.

    -Chris

  4. #24
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    Quote Originally Posted by srracer View Post
    I know C - Assembly I'd have to learn. But I'd love to be able to build this out of parts that are dirt cheap - which would lean towards using an cheap off the shelf microprocesser and force me to learn assembly I suppose.
    Not really, there are free PIC cross-compilers (compilers that generate code for a platform other than what you're running on) that run on Windows.

    If you've never done a PIC/stamp project, you're gonna have about $100 in start-up costs no matter what. The expense of any platform like this will look like:
    • PIC/stamp cost
    • PIC blaster or i2c interface
    • external parts (resistors, caps, RS232 chip)
    • breadboard and wires (HIGHLY recommended versus blowing through perf board)
    • _time_ (this is a big one, it may take you longer than you think to get the dev environment running)

    Don't discount eBay for stuff like the PIC programmer. You won't need anything fancy for what you're looking at doing.
    :: Mark

  5. #25
    VENDOR - OBDPros
    Join Date
    Mar 2006
    Posts
    359
    I have posted a method to unlock doors on newer GM vehicles, check out

    http://obdpros.com/yabb/YaBB.pl?num=1162750290/0

    Hopefully people find similar messages on other vehicles and we can build up a database.

    Paul
    www.obdpros.com

  6. #26
    Newbie
    Join Date
    Oct 2006
    Posts
    5
    I got my OBDpro and have figured out how to make some interesting changes to the radio & amplifier in my CTS from the computer... I also have ordered an AVR microcontroller and some prototype components... This ought to be fun! I'll update the list if I make some good progress.

    Thanks for everybody's help!!
    -Chris

  7. #27
    VENDOR - OBDPros
    Join Date
    Mar 2006
    Posts
    359
    Quote Originally Posted by srracer View Post
    I got my OBDpro and have figured out how to make some interesting changes to the radio & amplifier in my CTS from the computer... I also have ordered an AVR microcontroller and some prototype components... This ought to be fun! I'll update the list if I make some good progress.

    Thanks for everybody's help!!
    -Chris
    Hey Chris,

    Thats great work, don't be shy please tell us what commands you discovered so far

    Paul

  8. #28
    Newbie
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    Nov 2006
    Location
    SC
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    2
    if only someone knew how to recode the idrive on the bmw thru obdII

  9. #29

  10. #30
    Constant Bitrate
    Join Date
    Jul 2004
    Posts
    127
    I have a 2003 Impala. I'm willing to test.

    Has anyone actually built a device with the cell module? I would love to build one and mate it to the odbii sensor.


    Dwaine
    2003 Black Impala

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