This Arduino Sketch tests a 3D Printer TL-TOUCH auto leveling sensor for 3D Printers.
Like the one in these links. https://drive.google.com/file/d/0B_lX6Bwizwk0RzFhTTF2dHhSems/view?usp=sharing
BLtouch VS 3Dtouch 3D Printer bed leveling sensor match up
/* This tests a 3D Printer TL-TOUCH...