serial module

[Paul Rubin]

John Nagle <nagle at animats.com> writes:
>    If a device is registered as /dev/ttyUSBnn, one would hope that
> the Linux USB insertion event handler, which assigns that name,
> determined that the device was a serial port emulator.  Unfortunately,
> the USB standard device classes
> (http://www.usb.org/developers/defined_class) don't have "serial port
> emulator" as a standardized device.  So there's more variation in this
> area than in keyboards, mice, or storage devices.

Hmm, I've been using USB-to-serial adapters and so far they've worked
just fine.  I plug the USB end of adapter into a Ubuntu box, see
/dev/ttyUSB* appear, plug the serial end into the external serial
device, and just use pyserial like with an actual serial port.  I didn't
realize there were issues with this.