Aux

The Aux action changes the state of an auxiliary output on your Ness alarm panel. This requires PCB version 7.8 or higher.

This is handy when you want to drive an extra output from Home Assistant, for example to switch a gate relay or a siren that is wired to one of the panel’s aux outputs.

Using this action from the user interface

If you prefer building automations and scripts visually, Home Assistant walks you through this action step by step. You pick what to target, tweak a few options, and save. No YAML knowledge required.

To change an aux output from an automation or a script:

1. Go to Settings > Automations & scenes.
2. Open an existing automation or script, or select Create automation > Create new automation.
3. If you’re setting up a new automation, add a trigger in the When section. Scripts don’t need a trigger. They run when something else calls them.
4. In the Then do section, select Add action.
5. From the search box, search for and select Ness Alarm: Aux.
6. Enter the Output ID you want to change, and set the State on or off.
7. Select Save.

This action does not support targets. In the UI, you are not prompted to choose an area, device, entity, or label.

Options in the UI

Using this action in YAML

If you work directly in YAML, or you want to know exactly what Home Assistant does under the hood, this section has the technical reference. It lists the field names you use in YAML, their types, and which ones are required.

In YAML, refer to this action as ness_alarm.aux. A basic example looks like this:

action: ness_alarm.aux
data:
  output_id: 1

This turns on aux output 1.

Options in YAML

Try it yourself

Ready to test this? Open Developer tools > Actions, search for this action, fill in the fields, and select Perform action. You see what happens on your actual entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more] without writing a line of YAML.

More examples

Real scenarios where this action shows up in automations and scripts. Copy any example and adapt it to your setup.

Automation: switch an aux output with a helper

When a switch helper turns on, turn on aux output 1 on the panel.

• Trigger: A switch helper turns on
• Action: Ness Alarm: Aux

alias: "Drive Ness aux output"
triggers:
  - trigger: state
    entity_id: input_boolean.gate_relay
    to: "on"
actions:
  - action: ness_alarm.aux
    data:
      output_id: 1

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with the action you’re calling and what you expected to happen, or share on our subreddit /r/homeassistant.

Related actions

These actions work well alongside this one:

• Panic: Triggers a panic alarm on the Ness alarm panel.