Yes, using the code from AnonMonk...

You have to ask Win32 what the names of the COM ports are or probe up to a certain COMxx number.

There are USB ports that can show up as COM ports and I don't know how to create a complete list. I think its hard to do because a new COM port can just "show up" dynamically (i.e. when you plug in a new USB device).

This may not be right, but this is what it does on my machine.

#!/usr/bin/perl -w
use strict;
use Data::Dumper;

use Win32::SerialPort;
use Win32::OLE('in');
use constant wbemFlagReturnImmediately => 0x10;
use constant wbemFlagForwardOnly => 0x20;

my $computer = ".";

my $objWMIService = Win32::OLE->GetObject
    ("winmgmts:\\\\$computer\\root\\CIMV2") 
    or die "WMI connection failed.\n";
    
my $colItems = $objWMIService->ExecQuery
    ("SELECT * FROM Win32_SerialPortConfiguration",
     "WQL",wbemFlagReturnImmediately | wbemFlagForwardOnly);

foreach my $objItem (in $colItems)
{
    print "Caption: $objItem->{Caption}\n";
    print "Name: $objItem->{Name}\n";
}
__END__
prints:
Caption: COM1
Name: COM1

[download]
I think perhaps another possibility is to "probe COM ports". Use a block "eval" on the "open_uart($_);" statement. >br> Run through the first 32 ports. If a port works works then $_ is a valid COM port and push it onto some stack.

my @valid_com_ports;
foreach my $com ( map{"COM$_"}1..32)
{
   # decide if this $com is ok or not..
   # perhaps use the open_uart function()
   # and then push @valid_com_ports, $com;
}

[download]

In reply to Re^3: finding a serial port with Win32::SerialPort by Marshall
in thread finding a serial port with Win32::SerialPort by pashanoid

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