 		}
 	}
 	if (running) {
-		digitalWrite(STEP_PIN, HIGH);
+		digitalWrite(pinStep, HIGH);
 		delayMicroseconds(speed);
-		digitalWrite(STEP_PIN, LOW);
+		digitalWrite(pinStep, LOW);
 		delayMicroseconds(speed);
 	}
 }

	Serial.begin(9600);
	myStepper.begin();
	myStepper.SilentStepStick2130(1000);
	digitalWrite(EN_PIN, LOW);
	Serial.println("Setup ready");
}


float hold_x = 0.5;

#include <TMC2130Stepper.h>
TMC2130Stepper myStepper = TMC2130Stepper(pinEN, pinDIR, pinStep, pinCS);

void serialTuple(String cmd, int arg) {
	Serial.print("Received command: ");
