DHT11

#include "DHT.h"

#define DHTPIN 7
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
const int buzzer = 8; //buzzer to arduino pin 9

void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));
  pinMode(buzzer, OUTPUT);

  dht.begin();
}

void loop() {
  delay(2000);
  tone(buzzer, 5000);

  float h = dht.readHumidity();
  float t = dht.readTemperature();
  float f = dht.readTemperature(true);

  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  float hif = dht.computeHeatIndex(f, h);
  float hic = dht.computeHeatIndex(t, h, false);

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.print(F("°F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("°C "));
  Serial.print(hif);
  Serial.println(F("°F"));

  if(t < 29.0){
    noTone(buzzer);
  }
  
}