flexi-bot/docs/marlin/_gcode/M301.md

tag	title	brief	author	requires	group	codes	notes	parameters	examples
m0301	Set Hotend PID	Set PID values for a hotend.	thinkyhead	PIDTEMP	thermal	M301	Requires `PIDTEMP`. View current PID values with [`M503`](/docs/gcode/M503.html). If `EEPROM_SETTINGS` is enabled, all hotend PID values are saved with [`M500`](/docs/gcode/M500.html), loaded with [`M501`](/docs/gcode/M501.html), and reset with [`M502`](/docs/gcode/M502.html).	tag optional description values E true Extruder index to set. Default 0. tag type index int tag optional description values P true Proportional value tag type value float tag optional description values I true Integral value tag type value float tag optional description values D true Derivative value tag type value float tag optional description values C true C term (requires `PID_EXTRUSION_SCALING`) tag type value float tag optional description values L true Extrusion scaling queue length (requires `PID_EXTRUSION_SCALING`) tag type value float tag optional description values F true F term (requires `PID_FAN_SCALING`) tag type value float

Set the values that control the PID loop for a hotend.