#include <DHT.h>

// Define the pin where the DHT22 is connected
#define DHTPIN 2

// Define the type of sensor (DHT22 in this case)
#define DHTTYPE DHT22

// Create an instance of the DHT class
DHT dht(DHTPIN, DHTTYPE);

// Define the pin where the LED is connected
#define LEDPIN 13

// Define the temperature threshold
#define TEMP_THRESHOLD 25.0 // Temperature threshold in degrees Celsius

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

void loop() {
  // Delay between measurements
  delay(2000);
  
  // Read the temperature from the DHT22 sensor
  float temperature = dht.readTemperature();
  
  // Check if the reading was successful
  if (isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  
  // Print the temperature to the Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  // Control the LED based on the temperature
  if (temperature > TEMP_THRESHOLD) {
    digitalWrite(LEDPIN, HIGH); // Turn the LED on
  } else {
    digitalWrite(LEDPIN, LOW);  // Turn the LED off
  }
}