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

		if (cmd == "run") {
			serialTuple("run", arg);
			running = arg;
		}
		else if (cmd == "speed") {
			serialTuple("speed", arg);

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