This project describes how to perform laser engraving and cutting using a Creality Ender 3 S1 pro. This involves both equipping the I/O of the Ender motherboard with an opto-coupler to prevent damage ...
Works with generic laser ranging modules commonly found on AliExpress, as well as compatible units like the DFRobot SEN0366. These modules communicate via serial (UART) at 9600 baud.