190 lines
6.8 KiB
Groff
190 lines
6.8 KiB
Groff
.TH USBHID-UPS 8 "Tue Nov 10 2009" "" "Network UPS Tools (NUT)"
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.SH NAME
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usbhid-ups \- Driver for USB/HID UPS equipment
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.SH NOTE
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This man page only documents the hardware\(hyspecific features of the
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usbhid-ups driver. For information about the core driver, see
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\fBnutupsdrv\fR(8).
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This driver replaces the legacy hidups driver, which only supported
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Linux systems, and was formerly called newhidups.
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.SH SUPPORTED HARDWARE
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.B usbhid-ups
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brings USB/HID UPS monitoring to NUT on all platform supporting USB
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through libusb.It should detect any UPS that uses the HID power device
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class, but the amount of data will vary depending on the manufacturer
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and model.
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At the present time, usbhid-ups supports:
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the newer Eaton USB models,
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all MGE USB models,
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all the Dell USB models,
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some APC models,
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some Belkin models,
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some Cyber Power Systems models.
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some TrippLite models
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For a more complete list, refer to the NUT hardware compatibility list,
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available in the source distribution as data/drivers.list, or on the
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NUT website. You may use the "explore" driver option to gather
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information from HID UPSes which are not yet supported; see below for
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details.
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This driver is known to work on:
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most Linux systems,
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FreeBSD (beta stage) and maybe other *BSD,
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Darwin / Mac OS X,
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Solaris 10.
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.SH EXTRA ARGUMENTS
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This driver also supports the following optional settings:
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.IP "offdelay=\fInum\fR"
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Set the timer before the UPS is turned off after the kill power command is
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sent (via the \fB\-k\fR switch).
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The default value is 20 (in seconds). Usually this \fBmust be lower\fR than
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ondelay, but the driver will \fBnot\fR warn you upon startup if it isn't.
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.IP "ondelay=\fInum\fR"
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Set the timer for the UPS to switch on in case the power returns after the
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kill power command had been sent but before the actual switch off. This
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ensures the machines connected to the UPS are, in all cases, rebooted after
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a power failure.
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The default value is 30 (in seconds). Usually this \fBmust be greater\fR
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than offdelay, but the driver will \fBnot\fR warn you upon startup if it
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isn't. Some UPS'es will restart no matter what, even if the power is
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(still) out at the moment this timer elapses. In that case, you could try
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if setting 'ondelay = -1' in \fBups.conf\fR helps.
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.IP "pollfreq=\fInum\fR"
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Set polling frequency, in seconds, to reduce the USB data flow.
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Between two polling requests, the driver will wait for interrupts (aka UPS
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notifications), which are data changes returned by the UPS by itself.
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This mechanism allow to avoid or reduce staleness message, due to the UPS
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being temporarily overloaded with too much polling requests.
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The default value is 30 (in seconds).
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.IP "pollonly"
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If this flag is set, the driver will ignore interrupts it receives from the
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UPS (not recommended, but needed if these reports are broken on your UPS).
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.IP "vendor=\fIregex\fR"
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.IP "product=\fIregex\fR"
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.IP "serial=\fIregex\fR"
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.IP "vendorid=\fIregex\fR"
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.IP "productid=\fIregex\fR"
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Select a specific UPS, in case there is more than one connected via
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USB. Each option specifies an extended regular expression (see
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\fBregex(7)\fR) that must match the UPS's entire vendor/product/serial
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string (minus any surrounding whitespace), or the whole 4-digit
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hexadecimal code for vendorid and productid. Try \fB-DD\fR for
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finding out the strings to match.
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Examples:
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\fB-x vendor="Foo.Corporation.*"\fR
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\fB-x vendorid=051d\fR (APC)
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\fB-x product=".*(Smart|Back)-?UPS.*"\fR
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.IP "bus=\fIregex\fR"
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Select a UPS on a specific USB bus or group of busses. The argument is
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a regular expression that must match the bus name where the UPS is
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connected (e.g. bus="002", bus="00[2-3]").
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.IP "explore"
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With this option, the driver will connect to any device, including
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ones that are not yet supported. This must always be combined with the
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"vendorid" option. In this mode, the driver will not do anything
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useful except for printing debugging information (typically used with
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\fB-DD\fR).
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.SH INSTALLATION
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This driver is not built by default. You can build it by using
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"configure \-\-with\-usb=yes". Note that it will also install other USB
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drivers.
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You also need to install manually the legacy hotplug files (libhidups
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and libhid.usermap, generally in /etc/hotplug/usb/), or the udev file
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(nut-usbups.rules, generally in /etc/udev/rules.d/)to address the
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permission settings problem. For more information, refer to the README
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file in nut/scripts/hotplug or nut/scripts/udev.
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On Linux with MGE equipment, you will need at least a 2.4.25 or 2.6.2 kernel as
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well as libusb-0.1.8 or later to disable hiddev support and avoid conflict.
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.SH IMPLEMENTATION
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The driver ignores the "port" value in \fBups.conf\fR. Unlike previous
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versions of this driver, it is now possible to control multiple UPS
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units simultaneously with this driver, provided they can be distinguished
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by setting some combination of the "vendor", "product", "serial",
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"vendorid", and "productid" options. For instance:
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.nf
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[mge]
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driver = usbhid-ups
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port = auto
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vendorid = 0463
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[tripplite]
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driver = usbhid-ups
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port = auto
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vendorid = 09ae
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.fi
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.SH KNOWN ISSUES AND BUGS
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.SS "Repetitive timeout and staleness"
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Some models tends to be unresponsive with the default polling frequency.
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The result is that your system log will have lots of messages like:
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.nf
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usb 2-1: control timeout on ep0in
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usb 2-1: usbfs: USBDEVFS_CONTROL failed cmd usbhid-ups rqt 128 rq 6 len 256
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ret -110
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.fi
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In this case, simply modify the general parameter "pollinterval" to a higher
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value (like 10 for 10 seconds). This should solve the issue.
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.SS "Got EPERM: Operation not permitted upon driver startup"
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You have forgotten to install the hotplug files, as explained
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in the INSTALLATION section above. Don't forget to restart
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hotplug so that it applies these changes.
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.SS "Unattended shutdowns"
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The hardware which was used for development of this driver is almost
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certainly different from what you have and not all manufacturers follow
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the USB HID Power Device Class specifications to the letter. You don't
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want to find out that yours has issues here when a power failure hits
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your server room and you're not around to manually restart your servers.
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If you rely on the UPS to shutdown your systems in case of mains failure
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and to restart them when the power returns, you \fBmust\fR test this. You
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can do so by running 'upsmon -c fsd'. With the mains present, this should
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bring your systems down and then cycle the power to restart them again.
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If you do the same without mains present, it should do the same, but in
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this case, the outputs shall remain off until mains power is applied
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again.
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.SH AUTHORS
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.SS Sponsored by MGE UPS SYSTEMS <http://opensource.mgeups.com/>
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Arnaud Quette, Peter Selinger, Arjen de Korte
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.SH SEE ALSO
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.SS The core driver:
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\fBnutupsdrv\fR(8)
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.SS Internet resources:
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The NUT (Network UPS Tools) home page: http://www.networkupstools.org/
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