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           This man page only documents the hardware-specific features of the
           blazer driver. For information about the core driver, see nutupsdrv(8).


           The blazer driver is known to work with various UPSes from Blazer,
           Energy Sistem, Fenton Technologies, Mustek and many others. The NUT
           compatibility table lists all the known supported models. Keep in mind,
           however, that other models not listed there may also be supported, but
           haven't been tested.
           All devices with a serial interface (use the blazer_ser driver) and
           many with a USB interface (use the blazer_usb driver) are supported.


           You may need to override or provide defaults for some values, depending
           on the make and model of your UPS. The following are the ones that most
           likely will need changing (see ups.conf(5)):
           default.battery.voltage.high = value
               Maximum battery voltage that is reached after about 12 to 24 hours
               charging. If you want the driver to report a guesstimated
               battery.charge, you need to specify this (see BATTERY CHARGE).
           default.battery.voltage.low = value
               Minimum battery voltage just before the UPS automatically shuts
               down. If you want the driver to report a guesstimated
               battery.charge, you need to specify this (see BATTERY CHARGE).
           default.battery.voltage.nominal = value,
           override.battery.voltage.nominal = value
               Some devices show a wrong nominal battery voltage (or none at all),
               so you may need to override or set a default value.
           override.battery.packs = value
               Some devices report a part of the total battery voltage. For
               instance, if battery.voltage.nominal is 24 V, but it reports a
               battery.voltage of around 2 V, the number of battery.packs to
               correct this reading would be 12. The driver will attempt to detect
               this automatically, but if this fails somehow, you may want to
               override this value.
           ondelay = value
               Time to wait before switching on the UPS (minutes). Note that a
               value below 3 minutes, may cause earlier firmware versions to not
               switch on automatically, so it defaults to 3 minutes.
           offdelay = value
               Time to wait before shutting down the UPS (seconds). This value is
               truncated to units of 6 seconds (less than 60 seconds) or 60
               seconds (more than 60 seconds). Defaults to 30 seconds.
               Parameter used in the (optional) runtime estimation. This takes two
               runtimes at different loads. Typically, this uses the runtime at
               full load and the runtime at half load. For instance, if your UPS
               has a rated runtime of 240 seconds at full load and 720 seconds at
               half load, you would enter
                   runtimecal = 270,100,720,50
               The first load should always be higher than the second. If you have
               values available for loads other than 100 and 50 % respectively,
               you can use those too, but keep them spaced apart as far as
               reasonably possible. Just don't get too close to no load
               (prediction of runtime depends more on idle load for the battery
           chargetime = value
               The time needed to fully recharge the battery after being fully
               discharged. If not specified, the driver defaults to 43200 seconds
               (12 hours). Only used if runtimecal is also specified.
           idleload = value
               Minimum battery load used by the driver to estimate the runtime. If
               not specified, the driver defaults to 10%. Only used if runtimecal
               is also specified.


           cablepower = string
               By default the driver will set DTR and clear RTS (normal). If you
               find that your UPS isn't detected or the communication with the UPS
               is unreliable, you may try if clear DTR and set RTS (reverse), set
               DTR and RTS (both) or clear DTR and RTS (none) improves this


           vendorid = regex, productid = regex, vendor = regex, product = regex,
           serial = regex
               Select a specific UPS, in case there is more than one connected via
               USB. Each option specifies an extended regular expression (see
               regex(7)) that must match the UPS's entire vendor/product/serial
               string (minus any surrounding whitespace), or the whole 4-digit
               hexadecimal code for vendorid and productid. Try -DD for finding
               out the strings to match.
               -x vendor="Foo.Corporation.*"
               -x vendorid=051d    # (APC)
               -x product=".*(Smart|Back)-?UPS.*"
           bus = regex


           This driver supports some instant commands (see upscmd(8)):
               Toggle the UPS beeper. (Not available on some hardware.)
               Turn on the load immediately.
               Turn off the load immediately (see KNOWN PROBLEMS).
           shutdown.return [value]
               Turn off the load and return when power is back. Uses the timers
               defined by ondelay and offdelay.
           shutdown.stayoff [value]
               Turn off the load and remain off (see KNOWN PROBLEMS). Uses the
               timer defined by offdelay.
               Stop a shutdown in progress.
               Perform a long battery test (Not available on some hardware.)
               Perform a (10 second) battery test.
           test.battery.start value
               Perform a battery test for the duration of value seconds (truncated
               to units of 60 seconds).
               Stop a running battery test (not available on some hardware.)


           Due to popular demand, this driver will report a guesstimated
           battery.charge and optionally battery.runtime, provided you specified a
           couple of the EXTRA ARGUMENTS listed above.
           If you specify both battery.voltage.high and battery.voltage.low in
           ups.conf(5), but don't enter runtimecal, it will guesstimate the state
           of charge by looking at the battery voltage alone. This is not reliable
           under load, as this only gives reasonably accurate readings if you
           disconnect the load, let the battery rest for a couple of minutes and
           then measure the open cell voltage. This just isn't practical if the
           power went out and the UPS is providing power for your systems.
                                    battery.voltage - battery.voltage.low
               battery.charge =  ------------------------------------------ x 100 %
           guesses the initial state of charge based on the battery voltage, so
           this may be less than 100 %, even when you are certain that they are
           full. There is just no way to reliably measure this between 0 and 100 %
           full charge.
           This is better than nothing (but not by much). If any of the above
           calculations is giving you incorrect readings, you are the one that put
           in the values in ups.conf(5), so don't complain with the author. If you
           need something better, buy a UPS that reports battery.charge and
           battery.runtime all by itself without the help of a NUT driver.


           The blazer drivers having replaced the megatec ones, some configuration
           changes may be required by users switching to blazer.
           Part of this, the following megatec options, in ups.conf, have to be
               You need to use default.battery.voltage.high and
           dtr and rts
               You need to use cablepower
               This parameter can simply be discarded, since it was a wrong
               understanding of the specification.


           Some UPS commands aren't supported by all models. In most cases, the
           driver will send a message to the system log when the user tries to
           execute an unsupported command. Unfortunately, some models don't even
           provide a way for the driver to check for this, so the unsupported
           commands will silently fail.
           Both the and shutdown.stayoff instant commands are meant to
           turn the load off indefinitely. However, some UPS models don't allow
           Some models report a bogus value for the beeper status (will always be
           enabled or disabled). So, the beeper.toggle command may appear to have
           no effect in the status reported by the driver when, in fact, it is
           working fine.
           The temperature and load value is known to be bogus in some models.


           Arjen de Korte <adkorte-guest at>, Alexander Gordeev
           <lasaine at>



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