Untitled

char data_serial;

void setup(){
  Serial.begin (9600); 
}

void loop() {
  if (Serial.available () > 0) {
    data_serial = Serial.read();

  if (data_serial == 'u') {
    analogWrite(6, 180);
    analogWrite(9, 0);
    analogWrite(3, 180);
    analogWrite(5, 0); 
    }
    if (data_serial == 'd') {
      analogWrite(6,0);
      analogWrite(9, 180);
      analogWrite(3, 0);
      analogWrite(5, 180);
    }
    if (data_serial =='r') {
      analogWrite(6,0);
      analogWrite(9, 180);
      analogWrite(3, 180);
      analogWrite(5, 0);
    }
    if (data_serial =='l') {
      analogWrite(6, 180);
      analogWrite(9, 0);
      analogWrite(3, 0);
      analogWrite(5, 180);
    }
    if (data_serial =='s') {
      analogWrite(6, 0);
      analogWrite(9, 0);
      analogWrite(3, 0);
      analogWrite(5, 0);
    }
  }
}