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This is the 1.0.1 release of the genpower (Generic Power
Monitoring for Linux) package. In reality, this is a maintenance
release of the unipower package under a new name. I was
requested to change the name by a firm that is marketing software
under the name UniPOWER.
NEW FEATURES:
* Users can now select from preconfigured UPS and cable
configurations at runtime. With a sufficient body of UPS and
cable configurations, this should allow most users to just
compile genpower 'right out of the box' and select the desired
configuration while installing.
* genpower will return an error code if it is unable to kill the
UPS's inverter during the shutdown process. This allows for
better error handling.
* genpower can now use the serial data transmit line for
inverter shutdown with the normal command syntax.
WHAT GENPOWER DOES:
The genpower package is basically a hack of Miquel van
Smoorenburg's powerd daemon, which is distributed in the SysVInit
package. The express aim of the genpower package is to add
additional functionally and a simpler means of configuring UPS
monitoring, in a full featured suite that can be configured to
work with most UPSs featuring an RS232 monitoring port.
Depending on the UPS, cable, and the manner in which the genpower
package is configured, the genpower package provides the
following features:
* Line power sensing, to detect when the power has failed and
initiate a delayed shutdown, or other appropriate actions.
This facility also allows the system to cancel the shutdown if
power is restored before the system is shutdown.
* Low battery detection, to detect when the UPS's battery is
running low and initiate an immediate shutdown.
* Physical cable detection, to detect connection errors.
* The ability to kill the UPS's inverter. This shuts the
inverter on the UPS off, to prevent the system from draining
the UPS's battery after it has shutdown. This allows the
system to restart itself, as if the power had been turned on
when line power is restored.
Additionally, this helps the UPS to retain enough power to
deal with power yo-yos, where the power comes up and goes down
several times before being fully restored.
* The unitest program, included in the genpower package, will
monitor the status of a serial line and report changes in the
status of the line. The information provided by unitest can
then be used to configure the genpower package for your UPS
and cable combination.
Instructions for configuring the genpower package are contained
in the documentation (genpower.docs) and should be read carefully
before proceeding.
Please let me know if you find any problems, if you have
suggestions for enhancing the package, or if you have information
on connecting genpower to a UPS that isn't covered in the
documentation.
Tom Webster
webster@kaiwan.com
07/07/95
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