/* How to use the DHT-22 sensor with Arduino uno
   Temperature and humidity sensor
   More info: http://www.ardumotive.com/how-to-use-dht-22-sensor-en.html
   Dev: Michalis Vasilakis // Date: 1/7/2015 // www.ardumotive.com */

//Libraries
#include <DHT.h>;

//Constants
#define BuzzerPIN 3
#define DHTPIN 2     // what pin we're connected to
#define DHTTYPE DHT22   // DHT 22  (AM2302)
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino


//Variables
int chk;
float hum;  //Stores humidity value
float temp; //Stores temperature value

void setup()
{
    Serial.begin(9600);
		pinMode(BuzzerPIN, OUTPUT);
	dht.begin();

}

void loop()
{
 Serial.begin("we start");
 float temp = dht.readTemperature();
 float hum = dht.readHumidity();
 if (isnan(hum)|| isnan(temp)){
    Serial.println("Sensor DHT11 is not working");
 
   }
 Serial.println(F("Humidity: "));
 Serial.print(hum);
 Serial.println(F("% Temperature: "));
 Serial.print(temp);

if (temp > 25){
 tone(BuzzerPIN, 1000);
 delay(1000);
 noTone(BuzzerPIN);
 }
}