I tried using Win32::Serial in a Windows 7 64 bit environment.
I pilfered this line from one of the examples, and it isn't working for me:
my $ob = Win32::SerialPort->new ("COM1") || die "Can't open port COM1: $!\n";
The error I get is:
Access is denied.
can't open device: COM1
Do you have any idea how to correct that?