[TriEmbed] Is that ttyUSB0 or ttyUSB1 this time?

[Pete Soper]

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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