gui.ino

int i = 0;
#define leduno 4
#define leddos 5
#define ledtres 6
#define ledcuatro 7
#define motor 13

// the setup routine runs once when you press reset:
void setup() {
  Serial.begin(9600);
  for (i=4; i<=7; i++){
       pinMode(i, OUTPUT);
  }

}

// the loop routine runs over and over again forever:
void loop() {
  if(Serial.available()) {
    char in = Serial.read();

    if(in == 'U'){
        digitalWrite(leduno, HIGH);
        digitalWrite(leddos, LOW);
        digitalWrite(ledtres, LOW);
        digitalWrite(ledcuatro, LOW);
        digitalWrite(motor, LOW);

    }

    if(in == 'D'){
        digitalWrite(leduno, LOW);
        digitalWrite(leddos, HIGH);
        digitalWrite(ledtres, LOW);
        digitalWrite(ledcuatro, LOW);
        digitalWrite(motor, LOW);
    }

    if(in == 'T'){
        digitalWrite(leduno, LOW);
        digitalWrite(leddos, LOW);
        digitalWrite(ledtres, HIGH);
        digitalWrite(ledcuatro, LOW);
        digitalWrite(motor, LOW);
    }

    if(in == 'C'){
        digitalWrite(leduno, LOW);
        digitalWrite(leddos, LOW);
        digitalWrite(ledtres, LOW);
        digitalWrite(ledcuatro, HIGH);
        digitalWrite(motor, LOW);
    }

    if(in == 'M'){
        digitalWrite(leduno, LOW);
        digitalWrite(leddos, LOW);
        digitalWrite(ledtres, LOW);
        digitalWrite(ledcuatro, LOW);
        digitalWrite(motor, HIGH);
    }
  }
}