APC UPS
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[edit] APC UPS Daemon Installation
This document describes how to install the APC UPS daemon. The main advantage of using an APC UPS (for me) is that it can communicate with your Linux box through either a RS-232 or USB serial connection. In the event of a prolonged power outage, should the APC UPS lose most of its battery capacity, it can tell the Linux box to perform a safe shutdown.
[edit] Install the Package
Make sure that you have uncommented the [community] repo in your /etc/pacman.conf file.
Install by using:
# pacman -Sy apcupsd
[edit] Configure APC UPS
The main configuration file for the APC UPS daemon can be found here: /etc/apcupsd/apcupsd.conf
In the following example, the lines of text are changed to support a USP style cable:
Before:
UPSCABLE smart UPSTYPE smartups DEVICE /dev/ttyS0
After:
UPSCABLE usb UPSTYPE usb DEVICE /dev/usb/hiddev[[0-15]]
[edit] Test
First, start the daemon:
# /etc/rc.d/apcupsd start
Next, wait about a minute and confirm the daemon is running and properly monitoring the battery:
# apcaccess status APC : 001,033,0819 DATE : Sat Mar 05 SOMETIME 2005 HOSTNAME : somehostname RELEASE : 3.10.16 VERSION : 3.10.16 (04 November 2004) unknown UPSNAME : somehostname CABLE : USB Cable MODEL : Back-UPS ES 725 UPSMODE : Stand Alone STARTTIME: Sat Mar SOMETIME 2005 STATUS : ONLINE LINEV : 119.0 Volts LOADPCT : 23.0 Percent Load Capacity BCHARGE : 100.0 Percent TIMELEFT : 30.5 Minutes MBATTCHG : 5 Percent MINTIMEL : 3 Minutes MAXTIME : 0 Seconds LOTRANS : 088.0 Volts HITRANS : 138.0 Volts ALARMDEL : Always BATTV : 13.5 Volts NUMXFERS : 0 TONBATT : 0 seconds CUMONBATT: 0 seconds XOFFBATT : N/A STATFLAG : 0x02000008 Status Flag MANDATE : 2002-12-02 SERIALNO : QB0249360043 BATTDATE : 2000-00-00 NOMBATTV : 12.0 FIRMWARE : 02.n2.D USB FW:n2 APCMODEL : Back-UPS ES 725 END APC : Sat SOMETIME 2005
To fully test your setup:
- Change TIMEOUT form 0 to 1 in the /etc/apcupsd/apcupsd.conf file
- Remove wall power from the UPS
- Observe that your Linux box powers down, in short order
- Plug the UPS back into the wall
- Power on your Linux box
- Change TIMEOUT from 1 back to 0 in the /etc/apcupsd/apcupsd.conf file
[edit] Congratulations!
Now all that's left to do is add the 'apcupsd' daemon to the DAEMONS=() list in /etc/rc.conf