#include <DHT.h>

#define DHTPIN 7          // changed from 2 to 7
#define DHTTYPE DHT22
#define BUZZER_PIN 8

DHT dht(DHTPIN, DHTTYPE);

const float TEMP_THRESHOLD = 30.0; // °C - change to your alert point

void setup() {
  Serial.begin(9600);
  pinMode(BUZZER_PIN, OUTPUT);
  digitalWrite(BUZZER_PIN, LOW);
  dht.begin();
  Serial.println("DHT22 Temperature Alert - Starting up...");
}

void loop() {
  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  if (isnan(temp) || isnan(hum)) {
    Serial.println("Failed to read from DHT sensor!");
    delay(2000);
    return;
  }

  Serial.print("Temp: ");
  Serial.print(temp);
  Serial.print(" C  |  Humidity: ");
  Serial.print(hum);
  Serial.println(" %");

  if (temp > TEMP_THRESHOLD) {
    Serial.println("!! ALERT: Temperature too high !!");
    tone(BUZZER_PIN, 1000);
  } else {
    noTone(BUZZER_PIN);
    digitalWrite(BUZZER_PIN, LOW);
  }

  delay(2000);
}