int ledVerde = 6;
int ledRojo = 7;
int buzzer = 13;
int sensor = 28;
int datos = 0;
void setup() {
  Serial.begin(115200);
  Serial.println("INICIAMOS EL SISTEMA");
  pinMode(ledVerde, OUTPUT);
  pinMode(ledRojo, OUTPUT);
  pinMode(sensor, INPUT);
  pinMode(buzzer, OUTPUT);
}
void loop() {

  datos = digitalRead(sensor);
  Serial.println(datos);
  digitalWrite(ledVerde, LOW);
  digitalWrite(ledRojo, LOW);
  digitalWrite(buzzer, LOW);
  
  if (datos == HIGH) {
    digitalWrite(ledVerde, HIGH);
    digitalWrite(ledRojo, LOW);
    digitalWrite(buzzer, HIGH);
  }
  else{
    digitalWrite(ledVerde, LOW);
    digitalWrite(ledRojo, HIGH);
    digitalWrite(buzzer, LOW);
  }
}