问题
I have two Arduinos now used by my program. SInce I'm on Linux and new to Linux, the port isn't static, like "com3" and "com6", I think it's "ttyUSB0" for the first Arduino which is connected, and "ttyUSB1" for the second and so on. But since both are connected when the OS boots, can I be certain that the port names will remain the same? Or is there some other way to access ports by name?
回答1:
use udev!
udevadm info -a -n /dev/ttyUSB1 | grep '{serial}' | head -n1
should give you the USB interfaces serial number.
then you can write udev rules:
example
SUBSYSTEM=="tty", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", ATTRS{serial}=="A6008isP", SYMLINK+="arduino"
SUBSYSTEM=="tty", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", ATTRS{serial}=="A7004IXj", SYMLINK+="buspirate"
SUBSYSTEM=="tty", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", ATTRS{serial}=="FTDIF46B", SYMLINK+="cisco.serial"
来源：https://stackoverflow.com/questions/32702885/permanent-usb-port-names-linux