I don't think it's the loop, but here's the code: 
#!/usr/local/perl -w

use Win32::OLE('in');
use strict;

# Variables
my @devIds       = ();
my @devPnPDevIds = ();

my $wmiService = Win32::OLE->GetObject("winmgmts:\\\\.\\root\\cimV2");
my $colDisks = $wmiService->ExecQuery("Select * from CIM_LogicalDevice
+");
foreach my $obj ( in( $colDisks ) )
{
  if($obj->{DeviceID} =~ /.*VID_0AF0&PID_(\d*)&MI_\d*\\(\d&.*&\d&).*/i
+)
  {
    my $tmpId = $obj->{DeviceID};
    $tmpId =~ s/\\/\\\\/g;
    my $tmpPnpId = $obj->{PNPDeviceID};
    $tmpPnpId =~ s/\\/\\\\/g;
    push(@devIds,$tmpId);
    push(@devPnPDevIds,$tmpPnpId);
  }
}

for(my $tel = 0; $tel < @devPnPDevIds; $tel++)
{
  print "The detected PNP device ID is: ".$devPnPDevIds[$tel]."\n";
  my $deviceID = $devPnPDevIds[$tel];
  my $subDevices = $wmiService->ExecQuery('ASSOCIATORS OF {Win32_PnPEn
+tity.DeviceID="'.$deviceID.'"} WHERE AssocClass=Win32_PnPDevice');
  foreach my $subDevProp ( in( $subDevices ) )
  {
    print "CreationClassName: ".$subDevProp->{CreationClassName}."\n";
    print "Caption: ".$subDevProp->{Caption}."\n";
    print "Description: ".$subDevProp->{Description}."\n";
    print "DeviceID: ".$subDevProp->{DeviceID}."\n";
    print "HardwareID: ".$subDevProp->{HardwareID}."\n";
    print "PNPDeviceID: ".$subDevProp->{PNPDeviceID}."\n";
    print "Service: ".$subDevProp->{Service}."\n";
    print "SystemName: ".$subDevProp->{SystemName}."\n";
  }
}

[download]
My guess is I'm missing some bus relations which I can't retrieve with "Win32_Bus". (The IDs I get with this call are not unique, hence I cann't use it).

Am I missing something in this query?

Update: Guess I'm looking for a logical bus, not a phisical one. But were (and how) to find it...?


Update:
Win32_Bus retrieves the phisical Bus devices. This is not the thing I needed, since more devices are connected on 1 physical bus.
I did found a solution however.
I have to querry the PDO (Physical Device Object). These can give me enough date (along with the deviceID) to combine all instances, created by the drivers, that belong to a single device.

In reply to Re^2: WMI: Bus relations by jschollen
in thread WMI: Bus relations by jschollen

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