/* How to use DHT-11 sensor with Arduino uno
   Temperature and humidity sensor
   Dev: Michalis Vasilakis // Date: 1/7/2015 // www.ardumotive.com */

//Libraries
#include <DHT.h>

//Constants
#define DHTPIN 2     // what pin we're connected to
#define DHTTYPE DHT11   // DHT 11  (AM2302)
// Initialize DHT sensor for normal 16mhz Arduino
DHT dht(DHTPIN, DHTTYPE);

//Variables
int ledBaja = 10; // pin del led
int ledMedia = 11;
int ledAlta = 12;
int chk;
float hum;  
float temp; 

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

  pinMode(ledBaja, OUTPUT); // configura el led como salida
  pinMode(ledMedia, OUTPUT);
  pinMode(ledAlta, OUTPUT);
    
}

void loop()
{
    
    hum = dht.readHumidity();
    temp= dht.readTemperature();
    
    Serial.print("Humidity: ");
    Serial.print(hum);
    Serial.print(" %, Temp: ");
    Serial.print(temp);
    Serial.println(" Celsius");

    digitalWrite(ledBaja, LOW); 
    digitalWrite(ledBaja, LOW);
    digitalWrite(ledBaja, LOW);

    if (temp <= -0.1) {
        digitalWrite(ledBaja, HIGH); 
        digitalWrite(ledAlta, LOW);
        digitalWrite(ledMedia, LOW);
        Serial.println("Baja Temperatura");
        
    } else if (temp > 5.5) {
        digitalWrite(ledAlta, HIGH); 
        digitalWrite(ledBaja, LOW); 
        digitalWrite(ledMedia, LOW);
        Serial.println("Temperatura Alta");
    } else {
        digitalWrite(ledMedia, HIGH); 
        digitalWrite(ledBaja, LOW); 
        digitalWrite(ledAlta, LOW);
        Serial.println("Temperatura Media");
    }
    
    delay(1000); //Delay 2 sec.
}