// -------------------------------------------------------------------------- //

#include <DHT.h>
#define DHT22_PIN 15

const int ledVerde = 13;
const int ledAmarillo = 12;
const int ledRojo = 14;
const int buzzer = 27;

DHT dht22(DHT22_PIN, DHT22);

// -------------------------------------------------------------------------- //

void setup() {
  Serial.begin(115200);
  dht22.begin();

  pinMode(ledVerde, OUTPUT);
  pinMode(ledAmarillo, OUTPUT);
  pinMode(ledRojo, OUTPUT);
  pinMode(buzzer, OUTPUT);
  digitalWrite(ledVerde, LOW);
  digitalWrite(ledAmarillo, LOW);
  digitalWrite(ledRojo, LOW);
  digitalWrite(buzzer, LOW);
}

// -------------------------------------------------------------------------- //

void loop() {
  float temperatureC = dht22.readTemperature();

  Serial.print("Temperature: ");
  Serial.print(temperatureC);
  Serial.println(" C");

  if (temperatureC < 20) {
    digitalWrite(ledVerde, HIGH);
    digitalWrite(ledAmarillo, LOW);
    digitalWrite(ledRojo, LOW);
    digitalWrite(buzzer, LOW);
  } else if (temperatureC >= 20 && temperatureC <= 30) {
    digitalWrite(ledVerde, LOW);
    digitalWrite(ledAmarillo, HIGH);
    digitalWrite(ledRojo, LOW);
    digitalWrite(buzzer, LOW);
  } else if (temperatureC > 30 && temperatureC <= 40) {
    digitalWrite(ledVerde, LOW);
    digitalWrite(ledAmarillo, LOW);
    digitalWrite(ledRojo, HIGH);
    digitalWrite(buzzer, HIGH);
  } else if (temperatureC > 40) {
    for (int i = 0; i < 5; i++) { // Parpadea 5 veces
      digitalWrite(ledRojo, HIGH);
      digitalWrite(ledAmarillo, HIGH);
      digitalWrite(ledVerde, HIGH);
      digitalWrite(buzzer, HIGH);
      delay(500);
      digitalWrite(ledRojo, LOW);
      digitalWrite(ledVerde, LOW);
      digitalWrite(ledAmarillo, LOW);
      digitalWrite(buzzer, LOW);
      delay(500);
    }
  }

  delay(10); // this speeds up the simulation
}

// -------------------------------------------------------------------------- //