[Nut-upsdev] Free and well documented NUT driver protocol

[Stuart Henderson]

On 2023-03-20, Łukasz Przeniosło <lukasz at przenioslo.com> wrote:
> I would like to create a new UPS device that communicate with the outer=20
> world over USB. The USB protocol can be either CDC serial or HID. I am=20
> looking for an existing protocol that can be legally used by me, so I=20
> don't need to come up with a new protocol + ask anyone to add any new=20
> code to the NUT project. It should also be well documented, since I need=20
> to reimplement it in my device.
>
> What would be the best approach here? I would appreciate all help and=20
> feedback!

Many of the HID-based UPS use the Power Device Class, docs are at
https://usb.org/sites/default/files/pdcv11.pdf