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== Debugging == [[File:Ibutton normal.png|thumbnail|right|Normalbetrieb]] [[File:Ibutton bork.png|thumbnail|right|Einschalten der Neonröhre?]] [[File:Ibutton bork zoom.png|thumbnail|right|Mit Zoom]] [[File:Ibutton reset.png|thumbnail|right|Reset des Readers?]] Der iButton-Reader scheint nicht für größere Entfernungen zum tatsächlichen Lesekontakt ausgelegt zu sein. Der One-Wire-Bus kann durch ein- bzw. ausschalten der Leuchtstoffröhre über der Tür (Kabel / Röhre verlaufen parallel zum RJ45-Kabel vom iButton-Reader) so stark gestört werden, dass sich diese Störung auf den USB-Teil des Readers fortpflanzt und den angeschlossenen Host beeinträchtigt. Auf der Tür-Dockstar ist es kein Problem, an einem Raspberry Pi funktioniert der iButton-Reader schlecht bis gar nicht, eine x86-Kiste kann das Problem erkennen und sich davon erholen. Relevanter Kernel-Log beim Einschalten der Röhre auf {{H|lastlight}}: <syntaxhighlight lang="text"> Jan 19 05:09:08 lastlight kernel: [214347.808082] hub 3-0:1.0: port 1 disabled by hub (EMI?), re-enabling... Jan 19 05:09:08 lastlight kernel: [214347.808227] usb 3-1: USB disconnect, device number 20 Jan 19 05:09:08 lastlight kernel: [214348.088041] usb 3-1: new full-speed USB device number 21 using uhci_hcd Jan 19 05:09:08 lastlight kernel: [214348.246910] usb 3-1: New USB device found, idVendor=04d8, idProduct=feb9 Jan 19 05:09:08 lastlight kernel: [214348.246919] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Jan 19 05:09:08 lastlight kernel: [214348.246926] usb 3-1: Product: IBL USB iButton reader Jan 19 05:09:08 lastlight kernel: [214348.246931] usb 3-1: Manufacturer: IBL Jan 19 05:09:08 lastlight kernel: [214348.254139] input: IBL IBL USB iButton reader as /devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/input/input21 Jan 19 05:09:08 lastlight kernel: [214348.254681] generic-usb 0003:04D8:FEB9.0011: input,hidraw0: USB HID v1.00 Keyboard [IBL IBL USB iButton reader] on usb-0000:00:1d.1-1/input0 </syntaxhighlight> Vorläufiger Workaround: iButton-Reader nur an {{H|door}} betreiben.
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