# Configuration

This guide explains how to configure trim switches, 3-position switches, standard buttons, and export model configurations using EdgeTX Companion on the Zorro RadioMaster transmitter.

{% hint style="warning" %}
The controller is supplied pre-configured, but this guide can be used for setting up the controller in case of a **failure**.
{% endhint %}

<figure><img src="/files/cQDg4olDMl5W8dmuf2rr" alt=""><figcaption></figcaption></figure>

### 1. Open MDL (Model) Settings

1. Press the **MDL** button on your Zorro transmitter.

***

### 2. Access Inputs and Mixes

1. Navigate to the **Inputs** menu.
2. Then go to the **Mixes** menu.

***

### 3. Configure Trim Switches

#### Inputs

1. Select any free input (e.g., `I20`).
2. Assign it to a **Trim Switch** (e.g., `TrimL`, `TrimR`).

#### Mixes

1. Select any channel after `CH8` (e.g., `CH9`).
2. Assign it to the input you just configured (e.g., `I20`).

***

### 4. Configure 3-Position Switches

#### Inputs

1. Assign three separate inputs to the same 3-position switch, each with a different state:
   * `I21` → Switch Up
   * `I22` → Switch Mid
   * `I23` → Switch Down

#### Mixes

1. Assign three channels (e.g., `CH10`, `CH11`, `CH12`) to the corresponding inputs.
2. Set each channel’s condition to the **opposite switch state** compared to what was set in **Inputs**.

***

### 5. Configure Remaining Buttons

For other buttons (e.g., `A`, `D`, etc.):

1. Go directly to the **Mixes** menu.
2. Select any free channel.
3. Assign it to the desired button.
4. No input or switch state configuration is required.

***

### 6. Testing Button Outputs on Linux

Install `jstest-gtk`:

```
sudo apt install jstest-gtk
```

Run the tool and verify activity as you press buttons and switches.

{% hint style="warning" %}
You have to map Nexus controls after configuration of joystick controller. This is done in section [\[Joystick Controller -> Ready to Use\]](https://docs.airvolute.com/uas-platforms/nexus-stribog-uas/stribog-uas-user-manual/joystick-controller/pages/zJyuNeIXUC1Rq1UIr3dP#id-5.-ready-to-use)
{% endhint %}

***

### 7. Exporting Models Using EdgeTX Companion

1. Download **EdgeTX Companion** from:\
   <https://edgetx.org/getedgetx/>
2. Extract the ZIP file and locate the AppImage, for example:

   ```
   EdgeTX_Companion_2.11.1-x86_64.AppImage
   ```
3. Put the Zorro into bootloader mode:
   * Hold **both horizontal trim buttons inward** and power on the device.
   * Select **USB Storage (SD + EEPROM)**.
4. Use EdgeTX Companion to read the model data and export it as a `.otx` file.

   > **Note:**\
   > There are other methods to manage and export models.

***


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