arduino_Stepmotor_28byj-48.ino

#include <Stepper.h>

const int stepsPerRevolution = 2048;

Stepper myStep = Stepper(stepsPerRevolution,8,10,9,11);
void setup() {
 
  myStep.setSpeed(15); // speed in rpm
  Serial.begin(9600);
}

void loop() {

  Serial.println("clockwise");
  myStep.step(stepsPerRevolution);
  delay(500);
  
  Serial.println("counterclockwise");
  myStep.step(-stepsPerRevolution);
  delay(500);
}