NyBoard

After using the USB uploader and USB data cable to connect the NyBoard and Chromebook, you will see a prompt: Please click Connect to Linux.

and check in the Settings interface, and it should be enabled as follows:

After downloading the project file OpenCat-main.zip from GitHub: https://github.com/PetoiCamp/OpenCat, use the following commands to unzip it to the Downloads folder.

cd /mnt/chromeos/MyFiles/Downloads/
sudo apt-get install unzip
unzip OpenCat-main.zip

For how to upload the sketch, please refer to the Upload Sketch for NyBoard.