motor.ino

const int stepPinX = 3; 
const int dirPinX = 4; 

const int stepPinY = 5;
const int dirPinY = 6;

char data = 0; 

void setup() {
  pinMode(stepPinX, OUTPUT); 
  pinMode(dirPinX, OUTPUT);

  pinMode(stepPinY, OUTPUT); 
  pinMode(dirPinY, OUTPUT);
  
  Serial.begin(9600);
                     
}

void loop() {
  if(Serial.available() > 0) {
    data = Serial.read();      
    Serial.print(data);        
    Serial.print("\n");  

           
    if(data == '1')           
      motorX(HIGH);
    if(data == '2')       
      motorX(LOW);

    if (data == '3')       
      motorY(HIGH);
    if (data == '4')
      motorY(LOW);
  } 
}

void motorX(bool value) {
  digitalWrite(dirPinX, value); 
  for(int x = 0; x < 400; x++) {
    digitalWrite(stepPinX, HIGH); 
    delayMicroseconds(300); 
    digitalWrite(stepPinX, LOW); 
    delayMicroseconds(300);
  }
}

void motorY(bool value) {
  digitalWrite(dirPinY, value); 
  for(int x = 0; x < 400; x++) {
    digitalWrite(stepPinY, HIGH); 
    delayMicroseconds(300); 
    digitalWrite(stepPinY, LOW); 
    delayMicroseconds(300);
  }
}