#include <SoftwareSerial.h>
#include <Stepper.h>

SoftwareSerial serial_sw(10, 9); //rx, tx

const int stepsPerRevolution = 200; // datasheet Nema 8 = 360/steep angle

// stepper library on pins 0, 1, 3 and 4 (motor driver pins)
Stepper myStepper(stepsPerRevolution, 0, 1, 3, 4);

int stepCount = 0;

void setup() {
// initialize the serial port
serial_sw.begin(9600);
}

void loop() {
// 1 step at a time
myStepper.step(1);
serial_sw.print("steps:" );
serial_sw.println(stepCount);
stepCount++;
delay(500); // 1/2 seconds delay
}