machines/systems/flexibot/docs/marlin/_gcode/M154.md

tag, title, brief, author, since, requires, group, codes, related, notes, parameters, examples

tag	title	brief	author	since	requires	group	codes	related	notes	parameters	examples
m0154	Position Auto-Report	Periodically auto-report position to serial	thinkyhead	2.0.8.1	AUTO_REPORT_POSITION	hosts	M154	M114	Requires `AUTO_REPORT_POSITION`. Also enable `EXTENDED_CAPABILITIES_REPORT` to notify hosts about this capability.	tag optional description values S true Interval in seconds between auto-reports. `S0` to disable. tag type seconds int	pre code Report current position every 4 seconds M154 S4 pre code Stop reporting position M154 S0

Some host software and serial controllers use M114 to get the current position, but polling with M114 is less than optimal, and in older versions of Marlin it would cause print stuttering. With M154 hosts can simply set an interval and Marlin will keep sending reports automatically. This method is preferred over polling with M114.