[Nut-upsdev] Two APC900 UPS on the same usbbus1

[Charles Lepple]

On Jul 18, 2019, at 2:02 AM, Markus Grundmann wrote:
> 
> ### Both drivers using the right device. Without the serial statement in ups.conf only '/dev/usb/1.5.0' was used.
> 
To be fair, the fact that both drivers can open the same device seems to be a bit of a regression in the FreeBSD USB API. Older versions (and Linux) prevent the same USB device (or interface, really) from being opened more than once.