> 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/products/rx-lorawan/configuration/rx-config-tab.md).

# RX CONFIG tab

The RX CONFIG tab allows you to configure the output communication of the *gateway*. This is where you define how the collected data is transmitted to your monitoring system via the Modbus protocol.

<div data-with-frame="true"><figure><img src="/files/54afb6d07d002d7a5e46a3e8b7e6c715b8a5e585" alt=""><figcaption></figcaption></figure></div>

## Modbus Properties

This menu defines the settings of the *gateway* as a Modbus Server (*Slave*).

* **Modbus ID** : Defines the slave address of the *gateway* on the network (essential for identification by the Master/Client).
* **Mode** : Select the active communication interface:
  * **RTU RS485** : Physical serial link via the top terminal block.
  * **TCP/IP** : Network connection via the Ethernet port.
  * **RTU RS485 + TCP/IP** : Simultaneous activation of both interfaces.
* **Serial Settings** (only if mode **RTU RS485** is active):
  * **Baud rate** : Transmission speed (e.g., 9600, 19200, 38400 baud).
  * **Data bits** : Number of bits per character (`8` required).
  * **Stop bits** : Number of stop bits (`1` or `2`).
  * **Parity** : Error detection setting (`None`, `Even` or `Odd`).

Validate the changes with the **Save**.

{% hint style="warning" %}
A **restart** of the RX LoRaWAN will be **necessary** to apply the changes.
{% endhint %}

## IP Properties

This menu lets you configure the network addressing of the *gateway* for access to the web interface and Modbus TCP/IP.

* **DHCP** :&#x20;
  * **Enabled** : The *gateway* automatically obtains an IP address from your DHCP server (router).
  * **Disabled** : Allows you to manually set a static configuration.
* **IP Address** : The network identifier of the *gateway* (e.g.: `192.168.77.77`).
* **Subnet Mask** : Defines the size of the local network (e.g.: `255.255.255.0`).
* **Gateway** (*gateway*) : The IP address of the router allowing access outside the local network.

Validate the changes with the **Save**.

{% hint style="warning" %}
A restart of the RX LoRaWAN will be necessary to apply the changes. In addition, **it will be necessary to modify the IP address in the browser URL** to point to the new configured IP address.
{% endhint %}


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