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When I plug in a device that uses the LUFA USB framework (or any USB<->serial peripheral), Ubuntu creates a /dev/ttyACM* device file. It also creates a /dev/bus/usb/001/002 file and a /sys/bus/usb/devices/usb1/1-1/1-1.3/1-1.3.1/ tree.

What are the differences between these? I ask because I am using pyudev, which provides device nodes such as the /dev/bus/... example, but I don't know if this is different to the tty. Is it?

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