The subject of the Linux UDEV subsystem is covered in many, many places on the net. UDEV is the event-based system that does things, like detecting a new device, and determining what to do with it.
Unfortunately, most of the articles I saw on the web are NOT COMPLETE! Some had this part, some had that part. Do I use this with that, or that with the other thing? The Gist.Github article was the ONE and ONLY place on the Internet that I have seen, that had the whole, entire, complete story. For example, after writing your new UDEV rules, you need to make UDEV reload all rules, AND cause a trigger to make UDEV evaluate them. Most articles and posts would mention triggering UDEV, and a few mentioned reloading the rules, but nobody, except the GitHub article, told me you had to do both! GAAAA.
Anyway, I wrote a pair of UDEV rules to get past the problem of UDEV sometimes swapping USB serial ports. I created a pair of symlinks pointing to the USB ports the USB dongles are plugged into. So far, L14 has been running great for nearly three days.
Now I can move on to other SPOCS features.
LEFT: The home of SPOCS: DellroyGMs' lab.
CENTER: The Penguin Farm. machines SPARCL12, L10, L11, & SPARCL14.
RIGHT: finally off the roof.
