Ruby/SerialPort is a Ruby library that provides a class for using
RS-232 serial ports. This class also contains low-level functions to
check and set the current state of the signals on the line.
It support POSIX (Linux, *BSD, Solaris, AIX, Mac OS X), Cygwin and native Windows.
The native Windows version of this library supports Microsoft's Visual C++
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Version 2, June 1991
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