The ATmega32U4 comes equipped with a full-speed USB transceiver, which can emulate any USB device. Also, I could utilize such a device to test keyboard and mouse functionalities of new single-board computers, for instance, Raspberry Pi, without kvetching about my lack of a proper keyboard and mouse :) Thus, I decided to create this project.įirst of all, to be able to send keyboard and mouse commands via USB, I used an Arduino Pro Micro centered around an ATmega32U4 - an 8-bit AVR very similar to the ATmega328. For a long time, I needed a simple device allowing me to send varying mouse and keyboard commands to test some of my web applications and games on browsers.
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