After KevinOConnor/klipper master branch add module filament_motion_sensor.py this fork is not necessary now.
Welcome to the Klipper project!
Klipper is a 3d-Printer firmware. It combines the power of a general purpose computer with one or more micro-controllers. See the features document for more information on why you should use Klipper.
To begin using Klipper start by installing it.
Klipper is Free Software. See the license or read the documentation.