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Thread: using Com port for signalling

  1. #46
    xiptron Newbie
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    Ok. As an aside, is there a restriction on the length of the filenames? I have noticed that it doesn't seem to like long filenames. At the moment I'm sticking to three letters plus extension.


  2. #47
    ccurtis Okay
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    Ziptron, here are the mods for the 1 key to force DSR.

    With regards to your last question, there is a filename limitation of 8 characters.

    Best wishes
    Attached Files

  3. #48
    xiptron Newbie
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    Have fitted 10k pulldown resistor. See next post.
    Last edited by xiptron; 4th July 2009 at 02:24 PM.

  4. #49
    xiptron Newbie
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    Pin 7 RTS is +12v continuously so I'm taking my output from Pin 4 DTR which is normally -12v, going +12v on trigger. Pin 6 DSR is about +200mV without the resistor but about -3.3v when connected to Pin 4 DTR via the 10k. Are these voltages what you'd expect?

    I'll be watching for false triggers but hopefully there won't be any now.
    Last edited by xiptron; 4th July 2009 at 02:52 PM.

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