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.
provides these tools.
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,
may also be used to exit the watch loop without needing to reset the board.
for Pins Debugging toggle options.
Requires PINS_DEBUGGING. This feature should be disabled for production use.
M43 [E<bool>] [P<pin>] [T] [W]
Ignore protection when reporting values
Digital Pin Number
Test BLTouch type servo probes. Use P to specify servo index (0-3). Defaults to 0 if P omitted
Toggle pins - see for options
Get a report on all pins
Get a report on all pins, ignore pin protection list when displaying values
Watch pin 56 for changes
M43 P56 W
Start watching endstops
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
Test probe controlled by servo index 2.
M43 S P2