You could use a tied filehandle to read the continuous incoming stream. The documentation of Win32::Serialport on CPAN has a section to cover a tied filehandle.

Another observation is that your code does -
(undef, $string_in) = $ob->read(65536);

[download]
where you discarded the input size with undef. What you should do is -
my $input_string;
{
  my ($size, $str) = $ob->read(4096); # 4k at a time
  $input_string .= $str;
  redo if ($size == 4096); # read more?
}

[download]
So the idea is to keep reading the input, and append to the input string, until there is no more input.

In reply to Re: win32::serialport buffer overflow by Roger
in thread win32::serialport buffer overflow by Anonymous Monk

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