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  1 use Device::USB;
  2 
...
  6   $dev->open();
  7   print "Manufactured by: $dev->manufacturer()\n";
  8   print "Product: $dev->product()\n";

Can't call method "idVendor" on an undefined value at kk.pl line 5, <D
+ATA> line 1.

[349416.436284] usb 4-2: new full-speed USB device number 3 using uhci
+_hcd
[349416.634282] usb 4-2: New USB device found, idVendor=0403, idProduc
+t=6001
...
[349416.642618] usb 4-2: Endpoint 2 MaxPacketSize 64
[349416.642624] usb 4-2: Setting MaxPacketSize 64
[349416.644397] usb 4-2: FTDI USB Serial Device converter now attached
+ to ttyUSB0