flexi-bot/docs/marlin/_gcode/M043.md

tag	title	brief	author	experimental	requires	group	codes	notes	parameters	examples
m0043	Debug Pins	Get information about pins.	thinkyhead	true	PINS_DEBUGGING	debug	M43	Requires `PINS_DEBUGGING`. This feature should be disabled for production use.	tag optional description values P true Digital Pin Number tag type pin int tag optional description W true Watch pins tag optional description values E true Watch endstops type bool tag optional description values T true Toggle pins - see [`M43 T`](/docs/gcode/M043-T.html) for options tag optional description values S true Test BLTouch type servo probes. Use `P` to specify servo index (0-3). Defaults to 0 if `P` omitted tag optional description values I true Ignore protection when reporting values	pre code Get a report on all pins M43 pre code Get a report on all pins, ignore pin protection list when displaying values M43 I pre code Watch pin 56 for changes M43 P56 W pre code Start watching endstops M43 E1 pre code Toggle pins 3-6 five times with 1 second low and 1 second high pulses but only if the pin isn't in the protected list. M43 T S3 L6 R5 W1000 pre code Test probe controlled by servo index 2. M43 S P2

When setting up or debugging a machine it's useful to know how pins are assigned to functions by the firmware, and to be able to find pins for use with new functions. M43 provides these tools. M43 by itself reports all pin assignments. Use P to specify a single pin. Use I to report the values on pins that are protected. Use W to watch the specified pin, or all pins. Use the E option to monitor endstops. Use S option to test a BLTouch type servo probe. Use T option to toggle pins.

The W watch mode option continues looping, blocking all further commands, until the board is reset. If EMERGENCY_PARSER is enabled, M108 may also be used to exit the watch loop without needing to reset the board.

See M43 T for Pins Debugging toggle options.