dht

w2

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

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  dht.begin();
}

void loop() {
  float t = dht.readTemperature();
  float h = dht.readHumidity();
  if (isnan(t) || isnan(h)) {
    Serial.println("Sensor error");
  } else {
    Serial.printf("T=%.1f°C  RH=%.1f%%\n", t, h);
  }
  delay(2000);
}