In Klipper firmware, you can control the printer’s LED light using the SET_PIN command.
This guide explains how to configure macro commands so the LED turns on automatically at the start of a print and off when the print finishes.
Turn LED Off
SET_PIN PIN=caselight VALUE=0
Turn LED On
SET_PIN PIN=caselight VALUE=1
You can add these commands to your slicer’s printer profile to automate LED control:
