> $$ 
< $0=44 	(Step pulse time, microseconds)
< $1=49 	(Step idle delay, milliseconds)
< $2=27 	(Step pulse invert, mask)
< $3=5 	(Step direction invert, mask)
< $4=1 	(Invert step enable pin, boolean)
< $5=0 	(Invert limit pins, boolean)
< $6=0 	(Invert probe pin, boolean)
< $10=0 	(Status report options, mask)
< $11=0.000 	(Junction deviation, millimeters)
< $12=-2147483.648 	(Arc tolerance, millimeters)
< $13=1 	(Report in inches, boolean)
< $20=0 	(Soft limits enable, boolean)
< $21=0 	(Hard limits enable, boolean)
< $22=0 	(Homing cycle enable, boolean)
< $23=49 	(Homing direction invert, mask)
< $24=2147483.648 	(Homing locate feed rate, mm/min)
< $25=2147483.648 	(Homing search seek rate, mm/min)
< $26=250 	(Homing switch debounce delay, milliseconds)
< $27=0.000 	(Homing switch pull-off distance, millimeters)
< $30=0 	(Maximum spindle speed, RPM)
< $31=0 	(Minimum spindle speed, RPM)
< $32=1 	(Laser -mode enable, boolean)
< $100=-2147483.648 	(X -axis steps per millimeter)
< $101=0.000 	(Y -axis steps per millimeter)
< $102=0.000 	(Z -axis steps per millimeter)
< $110=0.000 	(X -axis maximum rate, mm/min)
< $111=0.000 	(Y -axis maximum rate, mm/min)
< $112=-0.000 	(Z -axis maximum rate, mm/min)
< $120=0.000 	(X -axis acceleration, mm/sec^2)
< $121=0.000 	(Y -axis acceleration, mm/sec^2)
< $122=-0.000 	(Z -axis acceleration, mm/sec^2)
< $130=2147483.648 	(X -axis maximum travel, millimeters)
< $131=-0.000 	(Y -axis maximum travel, millimeters)
< $132=-0.000 	(Z -axis maximum travel, millimeters)
< ok