Setting UPS on CentOS 8

Configure Cyber Power System, Inc. CP1500 AVR UPS in CentOS 8

Get list of USB device

Connect USB cable from UPS to CentOS host and run following command


UPS Vendor and Product

Capture Vendor : XXXX and Product: YYYY

Bus 003 Device 002: ID 0764:0501 Cyber Power System, Inc. CP1500 AVR UPS

Create udev rule

For consistent naming let us create a udev rule

Create or Modify /etc/udev/rules.d/50-ups.rules (Update 0764 and 0501 with your Vendor and Product id)

SUBSYSTEM=="usb", ATTR{idVendor}=="0764", ATTR{idProduct}=="0501", SYMLINK+="ups0", GROUP="nut"

Notify udev of changes

udevadm control --reload-rules && udevadm trigger

Setup LISTEN address

Modify /etc/ups/upsd.conf and add following

LISTEN ::1 3493

Create UPS entry

Modify /etc/ups/ups.conf and add following

  driver = usbhid-ups
  port = /dev/ups0

Create user for UPS

Modify /etc/ups/upsd.users and add following (set you password)

     password =  myups123
     upsmon master
     actions = SET
     instcmds = ALL

Enable monitoring

Modify /etc/ups/upsmon.conf (user correct ups name, ups user and password)

MONITOR cybersmart@localhost 1 upsmon myups123 master

Enable and Start NUT services

systemctl enable nut-monitor nut-driver nut-server 
systemctl start nut-monitor nut-driver nut-server 

Check UPS status

upsc cybersmart

Here is output:

Init SSL without certificate database
battery.charge: 100
battery.charge.low: 10
battery.charge.warning: 20 CPS
battery.runtime: 2961
battery.runtime.low: 300
battery.type: PbAcid
battery.voltage: 13.8
battery.voltage.nominal: 12
device.mfr: CPS
device.model:  CP 1500C
device.type: ups usbhid-ups
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: /dev/ups0
driver.parameter.synchronous: no
driver.version: 2.7.4 CyberPower HID 0.4
driver.version.internal: 0.41
input.transfer.high: 140
input.transfer.low: 90
input.voltage: 119.0
input.voltage.nominal: 120
output.voltage: 119.0
ups.beeper.status: enabled
ups.delay.shutdown: 20
ups.delay.start: 30
ups.load: 11
ups.mfr: CPS
ups.model:  CP 1500C
ups.productid: 0501
ups.realpower.nominal: 388
ups.status: OL
ups.test.result: Done and passed
ups.timer.shutdown: -60
ups.timer.start: 0
ups.vendorid: 0764