#include <Arduino.h>
#include <Wire.h>
#include <SPI.h>
#include <DHT.h>

#define DHTPIN 2     // Digital pin connected to the DHT sensor
#define DHTTYPE DHT11   // DHT 11

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  Serial.println(F("DHT11 test!"));

  dht.begin();
}

void loop() {

  delay(1000);  // DHT11每隔1s更新一次数据

  // 读取温湿度
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  // 读取失败处理
  if (isnan(h) || isnan(t)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // 计算热指数（利用摄氏温度）
  float hic = dht.computeHeatIndex(t, h, false);

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F(" Heat index: "));
  Serial.println(hic);
}