DHT22 MONITOR

// DHT22 — Temperature & Humidity Monitor
// Prints temperature and humidity every 2 seconds.

#include <DHT.h>

#define DHTPIN  2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
}

void loop() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  if (isnan(h) || isnan(t)) {
    Serial.println("Sensor error!");
  } else {
    Serial.print("Temp: ");
    Serial.print(t);
    Serial.print(" °C   Humidity: ");
    Serial.print(h);
    Serial.println(" %");
  }

  delay(2000); // DHT22 needs >=2s between readings
}