 // STEPPER_DRIVER
 // 0 - Adafruit Motorshield https://www.adafruit.com/products/1438
 // 1 - Easy Driver https://www.sparkfun.com/products/12779
-#define STEPPER_DRIVER 0
+#define STEPPER_DRIVER 1
 
 
 #if STEPPER_DRIVER == 0

  delay(250);
  int buttonV = digitalRead(STOP_BUTTON_PIN);
  Serial.println(buttonV);
  while (buttonV == STOP_BUTTON_TYPE)
  {
    if (!started) {
      Serial.println("Set reset speed.");
      Astepper1.setSpeed(RESET_SPEED);
      started = true;
    }
    Astepper1.runSpeed();

  if (time_diff_s >= RECALC_INTERVAL_S) {
    time_solar_last_s = time_solar_s;
    steps_wanted = tracker_calc_steps(time_solar_s + RECALC_INTERVAL_S/2.0);
    spd = (steps_wanted - DIRECTION*Astepper1.currentPosition())/(RECALC_INTERVAL_S/2);
    Astepper1.setSpeed(DIRECTION*spd);
    Serial.println(spd);
  }
  Astepper1.runSpeed();
