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This tutorial shows you how to always assign the same alias to a particular |
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Problem description
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Linux creates a special file when you connect USB devices. Those file are in the form /dev/ttyUSB0 for for the first one you plug in, /dev/ttyUSB1 for for the second, etc...
Those name are created dynamically and depends on the order devices are plugged in.
It might me is sometimes useful to assign static name names to those devices, e.g. to always flash reflash the right mote.
udev allows allows you to assign alias on certain devices depending on some of their properties.
First let's find the serial number of each USB devices:
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$ udevadm info --attribute-walk -n /dev/ttyUSB5 | grep serial |
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SUBSYSTEMS=="usb-serial" |
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ATTRS{serial}=="AK004SL3" |
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ATTRS{serial}=="0000:00:14.0" |
Repeat this step for all your devices, changing the /dev/ttyUSB to to yours.
Once you have the mapping between the aliases you want to apply and the serial number of devices you can put them in a udev rules files rules file like this one :
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$ cat /etc/udev/rules.d/10-local.rules |
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ACTION=="add", ATTRS{serial}=="A9040YRU", SYMLINK+="sniffer" |
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ACTION=="add", ATTRS{serial}=="AK004SL3", SYMLINK+="dr" |
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ACTION=="add", ATTRS{serial}=="AK004SL6", SYMLINK+="6n" |
You can also see which device an alias points to by doing:
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$ ls -all /dev/sniffer |
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lrwxrwxrwx 1 root root 7 août 30 14:17 /dev/sniffer -> ttyUSB3 |
Related
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Reference :