This project is part of the Teensy LC Challenge Teensy Project 002: HID USB Keyboard Checkout the source code on Github. Teensy Setup The environment setup section is common to all the Teensy LC projects, so I created a single post with the required instructions to set up the Arduino IDE, Teensy Loader application, Teensyduino and Linux udev rules. If you have not setup your Teensy LC yet, please go to the complete setup guide