#include <DHT.h>

// Define pin connections
#define DHTPIN 2           // DHT22 data pin connected to digital pin 2
#define DHTTYPE DHT22      // DHT22 sensor type
#define LEDPIN 13          // LED connected to digital pin 13

// Initialize DHT sensor
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);           // Start serial communication
  dht.begin();                  // Initialize the DHT22 sensor
  pinMode(LEDPIN, OUTPUT);      // Set LED pin as output
}

void loop() {
  // Wait a bit between readings
  delay(2000);

  // Read temperature and humidity
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature(); // Celsius by default

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

  // Print the readings
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.print(" %\tTemperature: ");
  Serial.print(temperature);
  Serial.println(" *C");

  // LED logic: Turn ON if temperature > 30°C
  if (temperature > 20.0) {
    digitalWrite(LEDPIN, HIGH);  // Turn LED ON
  } else {
    digitalWrite(LEDPIN, LOW);   // Turn LED OFF
  }
}