# Manual compilation and customization

Once exported and customized you need to upload manually the firmware, this requires some extra steps to get the right PID/VID signature and usb name

## Sketch customization

All the configuration constants are available in `externaldefines.h`

If you want to port the protocol to another platform MCU the serial protocol is visible in `protocol.h`

## Compiling

### Environment installation

* Install a legacy Arduino IDE 1.8.X (<https://www.arduino.cc/en/software>)

### Add a custom board to the Arduino IDE with your PID/VID

* Go into the Arduino IDE installation folder and inside the hardware\arduino\avr folder (ie : C:\Program Files (x86)\Arduino\hardware\arduino\avr on a standard installation)
* Make a backup of the boards.txt file
* Open the notepad as an administrator and edit the “boards.txt” file and add to the content of the boards.txt provided in the firmware export
* Save the file

### Uploading the sketch

* Choose your board in the boards menu (NB : See annexes if the custom board is not visible)

![](https://user-images.githubusercontent.com/2207331/213188072-3c3e77aa-0f93-42a6-918c-ebeeefdc565a.png)

* Select the serial port and upload

Notes :

* If upload protection was enabled to upload once again the sketch, unplug/plug back the board to allow upload (see Upload protection settings in sketch), or you can use the provided utility.
* After the first upload, device serial port name will change (as it is linked to the PID/VID)