Network UPS Tools (NUT)

The Network UPS Tools (NUT) integrationIntegrations connect and integrate Home Assistant with your devices, services, and more. [Learn more] allows you to monitor and manage an Uninterruptible Power Supply (UPS) for battery backup, a Power Distribution Unit (PDU), or other similar power device using a NUT server. It lets you view the status, receive notifications about important events, and execute commands as device actions for one or more such devices.

Supported devices

This integration supports hardware devices compatible with NUT. NUT’s hardware compatibility list is available from the Network UPS Tools website.

Prerequisites

You must have a NUT server configured to monitor one or more supported power device(s).

It is not possible to automatically detect a NUT server IP address change. You should therefore configure the NUT server with a static IP address, assign a fixed IP address reservation with DHCP, or use DNS as appropriate for your network.

In addition, you will need a username and password for this integration to log into the NUT server if authentication is required.

Configuration

To add the Network UPS Tools (NUT) device to your Home Assistant instance, use this My button:

Network UPS Tools (NUT) can be auto-discovered by Home Assistant. If an instance was found, it will be shown as Discovered. You can then set it up right away.

Setting up the integration requires the following information:

Supported functionality

Buttons

This NUT integration will add buttons for NUT server commands available for your device.

The following buttons are available for each switchable outlet:

• Power cycle outlet NAME: Power cycle the named outlet

Switches

This NUT integration will add switches for NUT server commands available for your device.

The following switches are available for each switchable outlet:

• Power outlet NAME: Turn power on/off for named outlet

Data updates

The integration uses pollingData polling is the process of querying a device or service at regular intervals to check for updates or retrieve data. By defining a custom polling interval, you can control how frequently your system checks for new data, which can help optimize performance and reduce unnecessary network traffic. [Learn more] to retrieve data from the NUT server. The default polling interval is once every 60 seconds.

Example Resources

Given the following example output from NUT (your variables may differ):

$ upsc ups_name@192.168.11.5
ups.timer.reboot: 0
battery.voltage: 27.0
ups.firmware.aux: L3 -P
ups.mfr: American Power Conversion
battery.runtime.low: 120
ups.delay.shutdown: 20
ups.load: 19
ups.realpower.nominal: 600
battery.charge.warning: 50
battery.charge.low: 10
ups.vendorid: 051d
ups.timer.shutdown: -1
ups.test.result: No test initiated
ups.firmware: 868.L3 -P.D
battery.mfr.ups.serial: 3B1519X19994
ups.productid: 0002
battery.runtime: 2552
battery.voltage.nominal: 24.0
battery.type: PbAc
ups.mfr.ups.status: OL
ups.model: Back-UPS RS1000G
ups.beeper.status: disabled
battery.charge: 100
input.sensitivity: medium
input.transfer.low: 88
input.transfer.high: 147
input.voltage: 121.0
input.voltage.nominal: 120
input.transfer.reason: input voltage out of range
output.current: 1.10
output.frequency: 60.20
output.voltage: 121.50
output.voltage.nominal: 120

Use the values from the left hand column. Support is included for most values with ups, battery, input and output prefixes.

UPS Status - human-readable version

An additional virtual sensor type ups.status.display is available translating the UPS status value retrieved from ups.status into a human-readable version.

Device Actions

A device action is available for each parameterless NUT command supported by the device. To find the list of supported commands for your specific UPS device, you can use the upscmd -l command followed by the UPS name:

$ upscmd -l my_ups
Instant commands supported on UPS [my_ups]:
beeper.disable - Disable the UPS beeper
beeper.enable - Enable the UPS beeper
test.battery.start.quick - Start a quick battery test
test.battery.stop - Stop the battery test

These commands will be available as device actions in Home Assistant, allowing you to interact with your UPS.

User Credentials and Permissions

To execute device actions through the NUT integration, you must specify user credentials in the configuration. These credentials are stored in the upsd.users file, part of the NUT server configuration. This file defines the usernames, passwords, and permissions for users accessing the UPS devices.

No actions will be available if no user credentials are specified for a given device.

Ensure the user you specify has the required permissions to execute the desired commands. Here’s an example of a user with command permissions in the upsd.users file:

[my_user]
    password = my_password
    actions = SET
    instcmds = ALL

In this example, the user my_user has permission to execute all commands (instcmds = ALL).

Please note that Home Assistant cannot determine whether a user can access a specific action without executing it. If you attempt to perform an action for which the user does not have permission, an exception will be thrown at runtime.

Remove integration

This integration follows standard integration removal. No extra steps are required.

To remove an integration instance from Home Assistant

1. Go to Settings > Devices & services and select the integration card.
2. From the list of devices, select the integration instance you want to remove.
3. Next to the entry, select the three-dot menu. Then, select Delete.