September 3, 2026

NUT on Fedora - part 1

My UPS is a Cyberpower CP1500PFCLCD. I am running Fedora 44 on an x86 desktop.

The UPS is now powering my linux system and is connected using the USB cable supplied with the unit.

When I run "lsusb", I see: 

Bus 001 Device 009: ID 0764:0601 Cyber Power System, Inc. PR1500LCDRT2U UPS

I see "nut" in the fedora packages, so I do this: 

su
dnf install nut
Package                                                Arch             Version
Installing:
 nut                                                   x86_64           0:2.8.5-3.fc44
Installing dependencies:
 freeipmi                                              x86_64           0:1.6.15-5.fc44
 libi2c                                                x86_64           0:4.4-4.fc44
 libmodbus                                             x86_64           0:3.1.12-1.fc44
 libntlm                                               x86_64           0:1.8-4.fc44
 neon                                                  x86_64           0:0.37.1-1.fc44
 nut-client                                            x86_64           0:2.8.5-3.fc44
Installing weak dependencies:
 nut-xml                                               x86_64           0:2.8.5-3.fc44
Transaction Summary:
 Installing:         8 packages
I could also install nut-cgi, which would allow me to run a web server with a page that displayed UPS information. I also see nut-monitor, which I did not install.

There is also a package "nuttcp", but it has nothing to do with NUT and UPS devices.

nut-scanner

Next, I run "nut-scanner". The -U option tells it to scan for nut-compatible USB devices. 
nut-scanner -U
Scanning USB bus.
[nutdev-usb1]
	driver = "usbhid-ups"
	port = "auto"
	vendorid = "0764"
	productid = "0601"
	product = "CP1500PFCLCDa"
	serial = "CXXRS7000562"
	vendor = "CPS"
	# bus = "001"
	# device = "009"
	# busport = "002"

Edit configuration files

su
cd /etc/ups
vi nut.conf
There are several files in /etc/ups -- we start with nut.conf In nut.conf, almost everything is commented out and I change this one line: 
#MODE=none
MODE=standalone
Eventually I will use "server" rather than standalone. There are notes about this in the conf file. In particular firewall rules will need to be fiddled. Nut has 3 layers: drivers, upsd, and upsmon.

In ups.conf the game is to paste in information from the scan above.
I try this: 

[myups]
   driver = usbhid-ups
   port = auto
   desc = "My CyberPower 1500"
The documentation says that the value of "port" will be ignored for a USB driver, but still recommends setting the value to auto.

After this, I got into trouble. We will continue in part 2

Have any comments? Questions? Drop me a line!