2026.6.3
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Set system properties

The Set system properties action changes the settings of your SimpliSafe base station, such as how long the alarm sounds, the entry and exit delays, the chime and voice prompt volumes, and whether the base station light shows when the system is armed.

You only need to provide the properties you want to change. Anything you leave out keeps its current value. This is handy for adapting your system to the time of day, for example using a longer entry delay during the day and a shorter one at night.

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 system properties 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 SimpliSafe: Set system properties.
  6. Choose the System, then set the properties you want to change.
  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

System (Required)

The SimpliSafe system whose properties should be set.
Alarm duration (Optional)

The length, in seconds, of a triggered alarm (30 to 480).
Alarm volume (Optional)

The volume level of a triggered alarm. One of off, low, medium, or high.
Chime volume (Optional)

The volume level of the door chime. One of off, low, medium, or high.
Entry delay away (Optional)

How long, in seconds, to delay triggering when entering while armed away (30 to 255).
Entry delay home (Optional)

How long, in seconds, to delay triggering when entering while armed home (0 to 255).
Exit delay away (Optional)

How long, in seconds, to delay triggering when exiting while armed away (45 to 255).
Exit delay home (Optional)

How long, in seconds, to delay triggering when exiting while armed home (0 to 255).
Light (Optional)

Whether the base station light shows when the system is armed.
Voice prompt volume (Optional)

The volume level of the voice prompts. One of off, low, medium, or high.

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 simplisafe.set_system_properties. A basic example looks like this:

ActionActions are used in several places in Home Assistant. As part of a script or automation, actions define what is going to happen once a trigger is activated. In scripts, an action is called *sequence*. [Learn more] 
action: simplisafe.set_system_properties
data:
  device_id: a1b2c3d4e5f6
  alarm_duration: 120
  chime_volume: "high"

This sets the alarm duration to 120 seconds and the chime volume to high on the selected system.

Options in YAML

device_id string Required

The SimpliSafe system whose properties should be set.

alarm_duration integer

The length, in seconds, of a triggered alarm (30 to 480).

alarm_volume string

The volume level of a triggered alarm. One of off, low, medium, or high.

chime_volume string

The volume level of the door chime. One of off, low, medium, or high.

entry_delay_away integer

How long, in seconds, to delay triggering when entering while armed away (30 to 255).

entry_delay_home integer

How long, in seconds, to delay triggering when entering while armed home (0 to 255).

exit_delay_away integer

How long, in seconds, to delay triggering when exiting while armed away (45 to 255).

exit_delay_home integer

How long, in seconds, to delay triggering when exiting while armed home (0 to 255).

light boolean

Whether the base station light shows when the system is armed.

voice_prompt_volume string

The volume level of the voice prompts. One of off, low, medium, or high.

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.

Tip

You don’t need to edit YAML to use these examples. Copy a YAML snippet from this page, open the automation editor in Home Assistant, and press Ctrl+V (or Cmd+V on Mac). Home Assistant automatically converts the pasted YAML into the visual editor format, whether it’s a full automation, a single trigger, a condition, or an action.

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.

Tip

AI assistants like ChatGPT or Claude can also explain actions or suggest the right one when you describe what you want in plain language.

Related actions

These actions work well alongside this one:

  • Set PIN: Sets or updates a SimpliSafe PIN.

  • Remove PIN: Removes a SimpliSafe PIN by its label or value.