My kludge for this was to interrogate the device, figure out what it was
with a label had stored in it, then create a hard link.
-Pete
On 2/19/21 5:54 PM, Michael Monaghan via TriEmbed wrote:
As I add more USB devices to my army, I've run into the issue that
ttyUSBx device names are first come, first served. I knew there had
to be a better way! This article
<https://medium.com/@inegm/persistent-names-for-usb-serial-devices-in-linux-dev-ttyusbx-dev-custom-name-fd49b5db9af1> introduces
udev, the Linux system that names USB devices and an easy way to
create unique aliases for each device. They'll all still get assigned
ttyUSBx based on the fastest electron out of the process scheduler,
however you can alias them to whatever your heart desires. ttyESP42?
No problem. SoilMonitor8? Sure thing.
One issue I ran into is my cheap clone manufacturer's love affair
ATTRS{serial}=0001. While the article relies on ATTRS{serial} to
discern the unique device, this fails when everyone is number 1. I'm
curious if there is some way post manufacturing to change those serial
numbers. Fortunately I have enough with actual numbers that it isn't
a real problem for me. For some devices, comparing attributes with
diff has helped.
Mike
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