#include <DHT.h>

#define DHTPIN 2
#define DHTTYPE DHT22
#define LEDPIN 13
#define TEMP_THRESHOLD 28.0

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
  pinMode(LEDPIN, OUTPUT);
  digitalWrite(LEDPIN, LOW);
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C, Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  if (temperature > TEMP_THRESHOLD) {
    digitalWrite(LEDPIN, HIGH);
    Serial.println("⚠️ ALERT: High Temperature! Turning ON LED.");
  } else {
    digitalWrite(LEDPIN, LOW);
    Serial.println("✅ Temperature Normal. LED OFF.");
  }

  delay(2000);
}