flexi-bot/docs/marlin/_gcode/M080.md

tag	title	brief	author	contrib	requires	group	codes	related	notes	parameters	example
m0080	Power On	Turn on the power supply	thinkyhead	AnHardt, Drachenkaetzchen	PSU_CONTROL	control	M80	M81	A `PS_ON_PIN` is also required. Check your board's pins file for the default. For Marlin 1.1.9 and earlier this feature is enabled by `POWER_SUPPLY`. Some octoprint plugins filter out M80/M81. If M80 does not work, use a plain serial terminal first prior reporting a bug.	tag optional description values S true Report Power Supply state	code M80 ; power on

Turn on the high-voltage power supply. Requires a board that's powered from USB or another 5V source.