stepper.ino

// Select "Arduino Nano" as card type
// Select "ATmega328P" or "ATmega328P (Old bootloader)" if Upload isn't working
// Select the COM port where you plug the Nano

// Include the Arduino Stepper.h library
#include <Stepper.h>

// Define number of steps per rotation
const int stepsPerRevolution = 2048;

// Wiring:
// Pin 8 to IN1 on the ULN2003 driver
// Pin 9 to IN2 on the ULN2003 driver
// Pin 10 to IN3 on the ULN2003 driver
// Pin 11 to IN4 on the ULN2003 driver

// Be carefull to the Pin order:
Stepper myStepper = Stepper(stepsPerRevolution, 8, 10, 9, 11);

// setup method, only executed once
void setup() {
  // Set rpm speed; Max 14
  myStepper.setSpeed(8);
  
  // Begin Serial communication at a baud rate of 9600:
  Serial.begin(9600);
}

// your program in the loop method
void loop() {
  // Step one revolution in one direction:
  myStepper.step(stepsPerRevolution); // myStepper.step(-stepsPerRevolution); for reversing direction
}