> For the complete documentation index, see [llms.txt](https://fellas.gitbook.io/fellas-guides/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://fellas.gitbook.io/fellas-guides/dma-set-up-guides/dma/arduino-flashing-guide.md).
# Arduino Flashing Guide
## Xenmouse Firmware Flashing Guide
### Introduction
This guide walks you through flashing firmware onto the Arduino device.
Tier 1 Flasher and Tier 2 Flasher can both be found on:\
***
### Required Hardware & Software
Make sure you have the following before continuing:
* FellasDMA Arduino hardware
* Micro USB data cable
* 2nd PC (used for flashing)
* Gaming PC (used for device runtime)
* Internet connection
* [CH340 Driver — Download Here](https://www.wch.cn/downloads/CH341SER_EXE.html)
* [Arduino IDE — Download Here](https://www.arduino.cc/en/software)
* Xenmouse Software or loader.exe
* Xenmouse License Key
***
### Flashing Tier 1 Firmware (Loader.exe)
#### Step 1: Install CH340 Driver on 2nd PC
* Download from [this link](https://www.wch.cn/downloads/CH341SER_EXE.html)
* Run the installer
* Verify in Device Manager under **Ports (COM & LPT)**: `USB-SERIAL CH340`
#### Step 2: Install Arduino IDE (for driver support only)
* [Download Arduino IDE](https://www.arduino.cc/en/software)
* Install normally — this helps with COM detection
* Make sure "Arduino AVR Boards" is installed aswell
#### Step 3: Connect Hardware
* Plug CH340 USB into **2nd PC**
* Plug ARD Micro USB into **Gaming PC**
* Plug mouse (wired or dongle) into the **Mouse port** on the device
#### Step 4: Redeem Your Firmware Code
* Visit
* Register an account if you haven't already
* Log in with your credentials
* Go to **Redeem Code** in the left sidebar
* Enter the license key received from your email or the Fellas website
Once redeemed, when you log into the T1 or T2 `.exe` tools, flash availability will be shown automatically.
#### Step 5: Run loader.exe
* Launch `loader.exe` on your 2nd PC
* Sign in using your email and password from Xenmouse.com
#### Step 5: Flash the Device
* Select `1. Flash Device`
* Follow the on-screen instructions
* When prompted with **CLICK RESET**, press the glowing reset button on the Arduino
#### Step 6: Activate Device (Every Restart)
* After each PC restart, run `loader.exe` again
* Choose `2. Activate Device`
* Wait for confirmation
> 🟠 KMBOX commands only work after activation. The mouse will still function without it.
***
### Flashing Tier 2 Firmware (Xenmouse Software)
#### Step 1: Install CH340 Driver on 2nd PC
* Download the CH340 driver from [this link](https://www.wch.cn/downloads/CH341SER_EXE.html)
* Run the installer and complete the setup
* Open **Device Manager** and verify that `USB-SERIAL CH340` appears under **Ports (COM & LPT)**
#### Step 2: Install Arduino IDE on 2nd PC
* Visit
* Download the appropriate version for your OS
* Install the IDE using default settings
* Make sure to install "Arduino AVR Boards"
#### Step 2: Connect FellasDMA Arduino Cables to PCs
* Plug your FellasDMA Arduino CH340 into the 2nd computer via USB
* Plug Micro-USB into the "Ard" Port and into Gaming PC
* Confirm the device powers on or is recognized by your system
#### Step 3: Redeem Your Firmware Code
* Visit
* Register an account if you haven't already
* Log in with your credentials
* Go to **Redeem Code** in the left sidebar
* Enter the license key received from your email or the Fellas website
Once redeemed, when you log into the T1 or T2 `.exe` tools, flash availability will be shown automatically.
#### Step 4: Install and Launch Xenmouse Software
* Visit
* Register an account if you haven't already
* Log in with your credentials
* Go to **Redeem Code** in the left sidebar
* Enter the license key received from your email or the Fellas website
Once redeemed, when you log into the T1 or T2 `.exe` tools, flash availability will be shown automatically.
#### Step 5: Connect Your Device
* Plug CH340 USB into **2nd PC**
* Plug ARD Micro USB into **Gaming PC**
* Plug mouse (dongle or wired) into the **Mouse slot** on the device
* Sign in with your Xenmouse.com account
#### Step 6: Begin Flashing
* Click the ⚡ **Flash Icon**
* You should see `1 Flashes Remaining`
* Click **Start Flash** and follow on-screen instructions
* When prompted with `CLICK RESET`, press the glowing reset button on the Arduino
#### Step 7: Finish Flashing
* Wait for the process to complete
* Click **Reconnect** in the top right corner
* Once the status shows **Activated**, click **Test**
* The mouse on the gaming PC should move slightly in a random direction if successful
#### Step 8: Run Component Test (Optional)
* Scroll to **Component Tests**
* Click **Start Flash** under CH340 / Serial Device Test to validate device health
***
### Troubleshooting
* **Device not found**: Try switching USB ports or cables
* **Stuck at bootloader**: Click the reset button on the device manually
* **No flashes remaining**: Ensure you've redeemed your code and have flash credits
***
### Support
For additional help, join the XenMouse Discord or visit their official site.
---
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