> For the complete documentation index, see [llms.txt](https://docs.ohmautomation.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ohmautomation.io/en/ios/guide/security-system.md).

# Security System

The app is designed to let you activate and deactivate the Alarm System as quickly as possible. That is why, on the main screen, you can clearly see the shield that indicates whether it is active or not.

{% hint style="info" %}
The shield is shown both in the top bar and in the section dedicated to system status information.
{% endhint %}

<div align="left"><img src="/files/46dO4IJTipxWNryZ2qtQ" alt="" width="300"></div>

When the alarm system is active, the shield appears green with a check mark `✔`, as shown in the following image.

<div align="left"><img src="/files/mz25vYrLREdJB9u8yHBi" alt="" width="300"></div>

If the system detects an unwanted presence or tampering, the shield will be replaced by a red bell.

<div align="left"><img src="/files/td0g1UAAGVAqhX87Ogzr" alt="" width="300"></div>

## Activation / Deactivation

To activate or deactivate the Alarm System, simply tap the shield on the main screen.

<div align="left"><img src="/files/46dO4IJTipxWNryZ2qtQ" alt="" width="300"></div>

Once you tap the shield button, a window will open that allows you to manage the Alarm System.

<div align="left"><img src="/files/KqMAoiqg1KeZ692UgMKE" alt="" width="300"></div>

{% hint style="warning" %}
Every operation (activation/deactivation/exclusion and access to *Advanced Settings*) requires entering the password.
{% endhint %}

## Face ID / Touch ID

To make alarm system operations even faster, you can enable biometric authentication (both face and fingerprint), so you can avoid entering the password.

{% hint style="warning" %}
To enable this feature, biometric authentication must already be enabled on your device.
{% endhint %}

To use biometric authentication, open the Alarm System screen and scroll down until you find the dedicated option.

<div align="left"><img src="/files/sCeuo6af1s2qSJTPveBw" alt="" width="300"></div>

Enable the option and enter the alarm system password in the window that appears.

Once this step is complete, press **Save** and the option should appear green.

<div align="left"><img src="/files/2J6T1YX5hMOY8lByPK9D" alt="" width="300"></div>

## Advanced Settings

In *Advanced Settings*, you can manage each alarm sensor individually. If multiple alarm areas are configured, you can also manage zones separately.

<div align="left"><img src="/files/0bbVcuIcKovpRNeDwKqN" alt="" width="300"></div>

The 3 buttons at the top let you quickly set all areas to the same mode.

By tapping an alarm area, you can access the list of associated sensors.

{% hint style="info" %}
If only one alarm area is configured, you will directly see the alarm sensor list.
{% endhint %}

<div align="left"><img src="/files/M7Y1EUqOfWIAXcFaVZfE" alt="" width="300"></div>

By selecting one of the three options (disable, enable, or exclude), you can set the operating mode of each individual sensor. To save, tap the check mark at the top right.

As with areas, the three buttons at the top let you quickly set all sensors to the same mode.

## What Does Exclusion Mean?

Excluding an alarm sensor temporarily removes it from alarm system management, as if it did not exist. This helps avoid reports such as tampering events in case of a fault.

<div align="left"><img src="/files/CIiYFQnnowLy7w5tDxjb" alt="" width="300"></div>

{% hint style="info" %}
Excluding all alarm sensors can be useful in cases of power outages, an event that may be detected as tampering with the alarm system.
{% endhint %}

## Tampering / Tamper

A tampering event (or tamper) can be detected in the following cases:

* Faulty alarm sensor
* Missing communication between alarm sensors and siren, due to data network issues, or if a board is faulty, disconnected, or tampered with
* Power loss
* Home Automation System restart
* Actual tampering
* Configuration changes made by a technician using the **OHMe Tech** app

{% hint style="warning" %}
It is very important to point out that an Alarm System works with a **prevention logic**. Because of this, tampering events may also be reported if power is lost due to your utility provider or an overload, and therefore not because of malicious intent.

Since there is no way to determine the exact cause of the service interruption, the system still detects tampering and the siren sounds.

Alarm Systems are often equipped with a **key to exclude the siren**, so it does not sound during planned power outages or maintenance on the system.
{% endhint %}