#include <DHT.h>

#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

int led = 7;
int buzzer = 8;

void setup() {
  Serial.begin(9600);
  dht.begin();
  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);
}

void loop() {
  float t = dht.readTemperature();
  float h = dht.readHumidity();

  if (isnan(t) || isnan(h)) {
    Serial.println("Error reading sensor");
    return;
  }

  Serial.print("Temp: ");
  Serial.print(t);
  Serial.print(" C, Hum: ");
  Serial.println(h);

  if (t > 30) {
    digitalWrite(led, HIGH);
    tone(buzzer, 1000);
    Serial.println("High Temp!");
  } else {
    digitalWrite(led, LOW);
    noTone(buzzer);
  }

  delay(2000);
}