#include <LiquidCrystal.h>
#include <Servo.h>
#include "DHT.h"
#define DHTPIN A0     // 连接到dht传感器的数字引脚
#define DHTTYPE DHT11   // DHT 11
DHT dht(DHTPIN, DHTTYPE);
Servo myservo;
const float BETA = 3950; 
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
int pushButton=digitalRead(2);
int potpin=1,val;
void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));

  dht.begin();
  myservo.attach(3);
}
void loop() {
  delay(2000);
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  float f = dht.readTemperature(true);

  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  float hif = dht.computeHeatIndex(f, h);
  float hic = dht.computeHeatIndex(t, h, false);
  pushButton=digitalRead(2);
  if(pushButton==LOW){
    delay(45);
    if(pushButton==LOW){
      lcd.print(t);
    Serial.print(F("Temperature: "));
  Serial.print(t);
  Serial.print("\n");
    delay(100);
      }
    
  } 
  else if(pushButton==HIGH){
     delay(45);
     if(pushButton==HIGH){
       lcd.print(f);
     Serial.print(f);
  Serial.print(F("°F"));
  Serial.print("\n");
     delay(100);
      }
    
  }
  lcd.clear();
  val=analogRead(potpin);
  val=map(val,0,1023,0,180);
  myservo.write(val);
  delay(15);
  pushButton=0;
}