[Discuss] Generic USB devices

[markw at mohawksoft.com]

> On Fri, Jun 9, 2023 at 2:30 PM <markw at mohawksoft.com> wrote:
>
>> pi at pi-top:~/scpi $ lsusb
>
> You might try 'lsusb -v' to see if any details are different.
> Or 'lsusb -t' if you can connect the devices on different sides or
> front/back of your computer.   Youmight
> be able to figure it out based on neighbors to where they are connected.
>
> Bill Bogstad
>

LOL, there is no real difference. Doing a diff found this:

   idProduct          0x7523 CH340 serial converter
-  bcdDevice           81.34
+  bcdDevice            2.63
   iManufacturer           0

-    MaxPower              104mA
+    MaxPower               98mA

Yes, of course, you could visually inspect and find some arcane difference
between two devices, but that isn't the point. The usb system supplies a
vendor/product ID so that "plug & play" works, however, when that "plug &
play" mechanism only presents you with a generic serial device, it is
broken.