flexi-bot/docs/marlin/_gcode/M140.md

tag	title	brief	author	group	codes	notes	parameters	examples
m0140	Set Bed Temperature	Set a new target bed temperature.	thinkyhead	thermal	M140		tag since optional description values I 2.0.6 true Material preset index. Overrides `S`. type tag int index tag optional description values S true Target temperature tag type temp float	pre code Set target temperature, no waiting M140 S80

Set a new target temperature for the heated bed and continue without waiting. The firmware manages heating in the background.

Use M190 to wait for the bed to reach the target temperature.