The idea early on was to leverage existing Arduino libraries to connect with a standard USB mouse, specifically, the hardware would take the form of an Arduino Mega 2560 with a USB Host Shield.

In this tutorial, I will show how you can handle the optical sensor inside a cheap optical-mouse for your next microcontroller project. Hope, this will allow your preferred microcontroller to look at ...

The firmware is a mix of Microchip’s USB HID demo code and [Daniel Kao]’s Arduino code for the PWM3389 sensor. Unlike the original Depraz’s male DE-9 connector, this updated version connects ...