flexi-bot/docs/marlin/_gcode/M355.md

tag	title	brief	author	requires	group	codes	notes	parameters	example
m0355	Case Light Control	Turn the case light on or off, set brightness	thinkyhead	CASE_LIGHT_PIN	control	M355	Requires a `CASE_LIGHT_PIN` to control the on/off or PWM state of the case light. The pin will need to be a 12V MOSFET pin with PWM control, or a signal pin connected to a MOSFET or relay to control the higher current required for the light.	tag optional description values P true Set the brightness factor from 0 to 255. type byte tag optional description values S true Turn the case light on or off. type bool	pre code Turn the case light on at half brightness M355 S1 P128

Set the case light power state and/or brightness.