Serial port identification

Development
1

I have been hearing OctoPrint On Air #24...

There is a reliable way of identifying serial ports which I use routinely: in Linux using udev I can assign a name to a serial port based on the adapter's serial number.

I just add a file /etc/udev/rules.d
ATTRS{manufacturer}=="FTDI", ATTRS{serial}=="A6007yX8", KERNEL=="ttyUSB*", MODE="666", SYMLINK+="ttyUSB42"

I believe that there is a method to fix a COM port number manually in Windows too...

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All of that is something that needs to be done by the user on their OS though. It's nothing that the printer can do on its own and hence not something suitable for the target audience of OctoPrint (which these days mostly shys away from touching the command line let alone configuring udev rules).