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Copying the Code from an ELM Chip

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  • Copying the Code from an ELM Chip

    Okay heres my question:

    I recently ordered an ELM323 Chip for communication between by computer and the OBDII port on my Jeep Grand Cherokee...The part socked me $23 after shipping and it got me thinking...this IS a microchip brand microprocessor...so, is there anyway of extracting the code from it so it can be duplicated dirt cheap....

    i know it may not be the right thing to do, but as long as im not selling it - i dont see a problem

    whatcha think, is it possible?
    Current Progress:
    [▓▓▓▓▓▓▓---]80%
    Final Assembly

    Ramline P3 PC
    10.4 inch Touchscreen
    Windows XP Embedded
    Road Runner
    http://www.projektnepa.com
    Electrical Engineer / Mobile DJ

  • #2
    It's not really expensive enough to worry about the cost, surely?

    $23 / 10 is dirt cheap in my book!
    Ford Focus MP3 : www.stevieg.org/carpc Blog Updated 29 January 2009!
    Car PC Status: Complete - Undergoing Software Redevelopment

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    • #3
      Also, Microchip processors have a read inhibit bit that can be set for copy protection. This will prevent a PIC programmer from reading in the firmware to do what you want to do.

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      • #4
        aww, rats - it was worth asking....and hey im a cheap college student. i cant afford the $23 in the beginning!
        Current Progress:
        [▓▓▓▓▓▓▓---]80%
        Final Assembly

        Ramline P3 PC
        10.4 inch Touchscreen
        Windows XP Embedded
        Road Runner
        http://www.projektnepa.com
        Electrical Engineer / Mobile DJ

        Comment


        • #5
          It's possible

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          • #6
            The chip used in ISO is PIC16C505 I think. Do you have the PWM??

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            • #7
              yes
              Current Progress:
              [▓▓▓▓▓▓▓---]80%
              Final Assembly

              Ramline P3 PC
              10.4 inch Touchscreen
              Windows XP Embedded
              Road Runner
              http://www.projektnepa.com
              Electrical Engineer / Mobile DJ

              Comment


              • #8
                I have a great familiarity with PIC chips and have researched their code security pretty throroughly. I have come to the conclusion that they are for all practical pruposes secure as long as the code protection bit is enabled upon programming. This is enabled on the ELM chips. There have been various hoaxes claiming to be able to read a locked down PIC but i havn't seen any valid ones.

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