This man page only documents the hardware-specific features of the usbhid-ups driver. For information about the core driver, see nutupsdrv(8).
This driver, formerly called newhidups, replaces the legacy hidups driver, which only supported Linux systems.
usbhid-ups brings USB/HID UPS monitoring to NUT on all platform supporting USB through libusb. It should detect any UPS that uses the HID power device class, but the amount of data will vary depending on the manufacturer and model.
At the present time, usbhid-ups supports:
For a more complete list, refer to the NUT hardware compatibility list, available in the source distribution as data/drivers.list, or on the NUT website. You may use the "explore" driver option to gather information from HID UPSes which are not yet supported; see below for details.
This driver is known to work on:
This driver also supports the following optional settings:
The default value is 20 (in seconds). Usually this must be lower than ondelay, but the driver will not warn you upon startup if it isn't.
The default value is 30 (in seconds). Usually this must be greater than offdelay, but the driver will not warn you upon startup if it isn't. Some UPS'es will restart no matter what, even if the power is (still) out at the moment this timer elapses. In that case, you could try if setting ondelay = -1 in ups.conf helps.
vendor=regex, product=regex, serial=regex, vendorid=regex, productid=regex
-x vendorid=051d* (APC)
This driver is not built by default. You can build it by using "configure --with-usb=yes". Note that it will also install other USB drivers.
You also need to install manually the legacy hotplug files (libhidups and libhid.usermap, generally in /etc/hotplug/usb/), or the udev file (nut-usbups.rules, generally in /etc/udev/rules.d/) to address the permission settings problem. For more information, refer to the README file in nut/scripts/hotplug or nut/scripts/udev.
On Linux with MGE equipment, you will need at least a 2.4.25 or 2.6.2 kernel as well as libusb-0.1.8 or later to disable hiddev support and avoid conflict.
The driver ignores the "port" value in ups.conf. Unlike previous versions of this driver, it is now possible to control multiple UPS units simultaneously with this driver, provided they can be distinguished by setting some combination of the "vendor", "product", "serial", "vendorid", and "productid" options. For instance:
[mge] driver = usbhid-ups port = auto vendorid = 0463 [tripplite] driver = usbhid-ups port = auto vendorid = 09ae
Some models tends to be unresponsive with the default polling frequency. The result is that your system log will have lots of messages like:
usb 2-1: control timeout on ep0in usb 2-1: usbfs: USBDEVFS_CONTROL failed cmd usbhid-ups rqt 128 rq 6 len 256 ret -110
In this case, simply modify the general parameter "pollinterval" to a higher value (like 10 for 10 seconds). This should solve the issue.
You have forgotten to install the hotplug files, as explained in the INSTALLATION section above. Don't forget to restart hotplug so that it applies these changes.
The hardware which was used for development of this driver is almost certainly different from what you have, and not all manufacturers follow the USB HID Power Device Class specifications to the letter. You don't want to find out that yours has issues here when a power failure hits your server room and you're not around to manually restart your servers.
If you rely on the UPS to shutdown your systems in case of mains failure and to restart them when the power returns, you must test this. You can do so by running upsmon -c fsd. With the mains present, this should bring your systems down and then cycle the power to restart them again. If you do the same without mains present, it should do the same, but in this case, the outputs shall remain off until mains power is applied again.
Originally sponsored by MGE UPS SYSTEMS. Now sponsored by Eaton http://opensource.eaton.com Arnaud Quette, Peter Selinger, Arjen de Korte
The NUT (Network UPS Tools) home page: http://www.networkupstools.org/