[Nut-upsdev] Re: [Nut-upsuser] Atlantis-Land UPS with Cypress CY7C63723 chip

Charles Lepple clepple at gmail.com
Tue Dec 13 15:31:24 UTC 2005

On 12/13/05, Peter Selinger <selinger at mathstat.dal.ca> wrote:
> ngpost1 wrote:
> >    If I ls the /dev directory, there are no ttyUSBxx nodes. Only tty's
> > and ttySxx. I believe there should be a ttyUSBsomething being created,
> > and this should be entered in the ups.conf file.
> No, USB devices are handled through /proc/bus/usb, not /dev/tty*.

This Cypress chip can show up as one of many different USB device
classes. The most common use is a USB-to-serial converter (which would
yield a /dev/ttyUSB* node), but as Peter and Lonnie explained, the UPS
manufacturer has programmed this chip to be a HID device.

- Charles Lepple

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