#include <DHT.h>
#define DHTPIN 15
#define DHTTYPE DHT22
#define LED_PIN 23

DHT dht(DHTPIN, DHTTYPE);

float threshold = 30.0;

void setup() {

  Serial.begin(115200);

  pinMode(LED_PIN, OUTPUT);

  dht.begin();
}
void loop() {

  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  Serial.print("Temperature: ");
  Serial.print(temp);
  Serial.print(" °C  ");

  Serial.print("Humidity: ");
  Serial.print(hum);
  Serial.println(" %");

  if(temp > threshold) {
    digitalWrite(LED_PIN, HIGH);
    delay(500);

    digitalWrite(LED_PIN, LOW);
    delay(500);

  } else {

    digitalWrite(LED_PIN, LOW);
    delay(1000);
  }
}