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cygwin /dev/ttyS2: Device or resource busy

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Old 08-21-2009
cygwin /dev/ttyS2: Device or resource busy
Ciao a tutti!!!
il mio problema è questo: sto cercando di inviare dei comandi AT da PC a cellulare utilizzando il bluetooth e cygwin e vorrei visualizzare le risposte nella shell bash. Per farlo apro due terminali utilizzando le seguente istruzioni:

xterm &

Sul primo scrivo

cat /dev/ttyS2

in quanto il dispositivo è collegato alla com3 e questo mi dovrebbe permettere di visualizzare a video i dati che entrano nella porta.
Il secondo terminale invece mi consente di inviare le istruzioni con il comandi AT, ad esempio:

echo "AT">/dev/ttyS2

L'errore che mi si presenta a questo punto è però il seguente:

/dev/ttyS2: Device or resource busy

Qualcuno sa come potrei risolvere questo problema??AIUTOOOOOO Smilie
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module::install::with

Module::Install::With(3)				User Contributed Perl Documentation				  Module::Install::With(3)

   interactive
       The "interactive" function tests for an install that has a user present (or at least, one in which it is reasonable for us to present
       prompts and other similar types of things).

       Returns true if in an interactive environment, or false otherwise.

   automated_testing
       Are we currently running in an automated testing environment, such as CPAN Testers.

       This is primarily a cleaner and more human-readable equivalent of checking $ENV{AUTOMATED_TESTING} yourself, but may be improved in line
       with best practices at a later date.

   release_testing
       Are we currently running in an release testing environment. That is, are we in the process of running in a potential highly-intensive and
       high dependency bloat testing process prior to packaging a module for release.

       This is primarily a cleaner and more human-readable equivalent of checking $ENV{RELEASE_TESTING} yourself, but may be improved in line with
       best practices at a later date.

   win32
       The "win32" function tests if the Makefile.PL is currently running in a native Microsoft Windows Perl, such as ActivePerl or Strawberry
       Perl.

       This is primarily a cleaner and more human-readable equivalent of checking "$^O eq 'MSWin32'" yourself, but may be improved in line with
       best practices at a later date.

   winlike
       The "winlike" function tests if the Makefile.PL is currently running in a Microsoft Windows Perl, under either cygwin or a native Win32
       Perl.

       This is primarily a cleaner and more human-readable equivalent of checking "$^O eq 'MSWin32' or $^O eq 'cygwin'"yourself, but may be
       improved in line with best practices at a later date.

SEE ALSO

       Module::Install

AUTHORS

       Adam Kennedy <adamk@cpan.org>

COPYRIGHT

       Copyright 2007 - 2012 Adam Kennedy.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       The full text of the license can be found in the LICENSE file included with this module.

perl v5.16.3							    2012-03-01						  Module::Install::With(3)