Installation and Configuration of a APC UPS using apcupsd
Having read already years ago, that there are Linux drivers for UPS's from APC (American Power Conversion) and having seen such a device in an electronics store (Mediamarkt) for Swiss Francs 79.- (about Euro 50.-), I bought the UPS 'APC Back-UPS CS 350 Battery Backup 350'. Installation of Hardware and Software.
- The information provided in the APC Software / Firmware Download is provided for general informational purposes only. It is subject to change without notice and is provided “as is” without warranty of any kind, express or implied.
- Here is a step by step manual guide for American Power Conversion USB UPS (Apcupsd) software installation process on Windows 7 / 8 / 8.1 / 10 / Vista / XP. 1 Download winapcupsd-3.14.10.exe file for Windows 7 / 8 / 8.1 / 10 / Vista / XP, save and unpack it if needed. 2 Switch on your new battery hardware.
This web-page consists of four sections: Introduction, installation,configuration, and statistics.
1. Introduction
Since one of our machines is configured as print server and because it doesother monitoring jobs, I wanted to equip it with an uninterruptable power supply(UPS). Having read already years ago, that there are Linux drivers for UPS'sfrom APC (American Power Conversion) and having seen such a device inan electronics store (Mediamarkt) for Swiss Francs 79.- (about Euro 50.-),I bought the UPS 'APC Back-UPS CS 350 Battery Backup 350'.
Free Driver Downloads For Windows 10
2. Installation of Hardware and Software
The installation of the hardware is easy and explained in the manual (and thanksto the company APC there is a printed manual included, not just a CD, whichneeds a Micro$oft program to read it).
Besides the power cables I also connected the data cable, which on one end(at the UPS) has a RJ-45-like plug and on the other end (at the PC) anUSB plug.
Software installation under Debian (Sarge) Linux with Kernel 2.4.26 is easyas well:
apt-get install apcupsd (and answer 'Y' when asked during installation)
3. Configuration of apcupsd
Useful information about the configuration of apcupsd can also befound on http://www.apcupsd.com/ (there,click on 'Online Manual')
Should you have a 2.6 Kernel, such as Kernel 2.6.7 as we use it, you shouldfirst do a few steps (if you use a 2.4 kernel, such as kernel 2.4.26, as we did,skip the following lines):
- Add the following line into your /etc/fstab:
none /sys sysfs defaults 0 0
- Then enter mount /sys
- Make sure, the USB subsystem is there and enter ls -l /sys/bus/usb/drivers
- If 'hiddev' is not there, you have a problem. We had this problem as wellafter having upgraded from a 2.4 to a 2.6 kernel and got an error-messagewhen entering apcaccess. I did two things, which helped to resolvethe problem:
- 1. apt-get remove apcupsd followed by a apt-get install apcupsd
- 2. Plug out and plug in again the USB cable on the PC - then things worked fine again!
We continue the description for 2.4 kernels...Now, let's check, whether the connected device was detected:
cat /proc/bus/usb/devices reveals (among many other lines):Ok, the last line tells us, that there is no driver. We load the driver intothe kernel by entering:
modprobe hid and enter again cat /proc/bus/usb/devices; nowwe see:(With a 2.6 kernel you will see 'Driver=usbhid' on the line above).
So now the driver 'hid' is activated. We can verify this as well by entering
cat /proc/bus/usb/drivers.
In order to have this driver loaded at next boot, we enter two lines in/etc/modules:
# for apcupsd:
hid
The next step is to create appropriate device files. The installation comeswith a script, which creates these. Simply enter:
/usr/share/doc/apcupsd/examples/make-hiddev
However, trying to start 'apcupsd' by entering the command:
/etc/init.d/apcupsd start
results in a comment like: 'Please check your configuration and then remove this warning to make apcupsd work'.In order so follow, what is happening, you should enter (in a separatewindow) the command:
tail -f /var/log/apcupsd.events and you may watch what is going on.
So we edit the file /etc/init.d/apcupsd and comment the three lines:After starting acpupsd again, we get the following message:It's time to edit the file /etc/apcupsd/apcupsd.conf and there weread, for USB devices we should set the variable DEVICE as follows:
DEVICE /dev/usb/hiddev[0-15] ... That's wrong! After startingapcupsd we get the message:Why this? A closer look in /usr/share/doc/apcupsd/examples/make-hiddev givesthe explanation: the device files are not created under /dev/usb but under/dev/usb/hid! So we again edit /etc/apcupsd/apcupsd.conf and set:
DEVICE /dev/usb/hid/hiddev[0-15]
But now we get - when starting apcupsd - the following message:Same error again? Mhh... Maybe, we should modify the cable type in theconfiguration file; so we edit /etc/apcupsd/apcupsd.conf again and set:
UPSTYPE usb (instead of UPSTYPE smartups) and we enteragain:
/etc/init.d/apcupsd start
Now we see in the file /var/log/apcupsd.events that things finallywork:
Mon Oct 04 15:02:58 CEST 2004 apcupsd 3.10.15 (04 August 2004) debian startup succeeded
The entries in /etc/apcupsd/apcupsd.conf without the commented lines look asfollows:
4. Statistics of apcupsd
We now may run the command apcaccess and view some statistics andinformation. Among other lines we get the output:However, the number of TIMELEFT is misleading! Let's now plug off the power tothe USV and after a minute or plug it in again. We now obtain:which is more realistic, since we have connected to the UPS not only aPC with a Pentium 4, but also a flat screen, an 8-port switch and anADSL-router. From now on, the UPS reports the correct values.
There are other interesting statistical values given, such as:
And, a power failure produces the following entries in the logfile/var/log/apcupsd.events :The only thing, which helped, was to unplug the USB-plug at the PC and toplug it in again. Then I entered:/etc/init.d/apcupsd restart
From then on things worked fine again!
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