> For the complete documentation index, see [llms.txt](https://enless.gitbook.io/centre-aide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://enless.gitbook.io/centre-aide/guides-installation/documentation-en/sensors/editor-3/use/motion-guard.md).

# Motion Guard

TX CO2 T\&H AMB: Motion Guard

Enabling the option **Motion Guard** allows **to protect the transmitter against tampering**. When a sudden movement occurs, the transmitter detects it thanks to its **built-in accelerometer** and triggers a **tamper alarm**.

{% hint style="success" %}
When a **tampering** of the transmitter or a **sudden movement** is detected, it immediately sends **immediately** a uplink **frame** notifying the triggering of the**Motion alarm** **Guard**.
{% endhint %}

Below is a detailed explanation of the activation and operation of the Motion Guard feature in **LoRa Easy mode** and in **LoRaWAN mode**.

## With LoRa Easy receivers

The feature **Motion Guard** becomes operational **24 hours after the transmitter is activated**, provided that the Motion Guard option has been **enabled** from the page **Config** **TX** of the receiver.

If the transmitter was powered on for the first time while this option was disabled, its subsequent activation constitutes a **configuration change**. This change can be taken into account: 

*  **Automatically** if the "New config" feature is enabled when the transmitter is added.
*  **Manually** with the following steps:
  * **Disconnect** the **battery** then **reconnect it** so that the transmitter receives the new configuration as if it were the first time.
  * Press the **button** of the transmitter for **5 seconds** to simulate a power-off and restart the initialization cycle to receive the new configuration.
  * Enable the "**New configuration**" option (you will find it in the advanced settings) which will allow the transmitter to receive a new configuration every 24 hours.

In all cases, **a 24-hour delay** is required before the feature *Motion Guard* is fully operational.

## With the *gateway* RX LoRaWAN

From the **TX CONFIG** tab of the LoRaWAN RX, it is possible when adding or editing a sensor to enable the **Motion Guard** from the **advanced** **settings**.

The transmitter will take **into account** its configuration **automatically** as of its next transmission of*'uplink* data*.*

## In LoRaWAN mode

Enabling the Motion Guard feature requires sending a ***downlink***. In Resources, you will find the tools needed to generate a *downlink* configuration for your TX by clicking on the link below.

{% content-ref url="/spaces/SivuVFNeBsenUAqOB2m6/pages/33137e39f5ffa74c47f9d170409a68b30e04e220" %}
[Codecs and decoding](/centre-aide/ressources/ressources-en/lora-sensors/codecs-and-decoding.md)
{% endcontent-ref %}

{% hint style="info" %}
In all cases, **a 24-hour delay** is required before the feature *Motion Guard* is fully operational.
{% endhint %}


---

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