[`M112`](/docs/gcode/M112.html) is the fastest way to shut down the machine using a host, but it may need to wait for a space to open up in the command queue. Enable `EMERGENCY_PARSER` for an instantaneous [`M112`](/docs/gcode/M112.html) command.
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Shut down now!
M112
Used for emergency stopping, M112 shuts down the machine, turns off all the steppers and heaters, and if possible, turns off the power supply. A reset is required to return to operational mode.
