#include "DHT.h"

#define DHTPIN 21      // Use GPIO 21 for DHT data
#define DHTTYPE DHT22  // DHT22 sensor type

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  Serial.println("DHT22 test starting...");

  dht.begin();
  Serial.println("Warming up DHT22...");
  delay(5000); // allow sensor to stabilize
}

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

  if (isnan(temp) || isnan(hum)) {
    Serial.println("Failed to read from DHT sensor!");
  } else {
    Serial.printf("Temperature: %.2f °C | Humidity: %.2f%%\n", temp, hum);
  }

  delay(2000); // read every 2 seconds
}