#include "DHT.h"
#define DHTTYPE DHT22
#define DHTPIN 9
DHT dht(DHTPIN, DHTTYPE);

const byte clockPin = 4;
const byte latchPin = 3;
const byte dataPin = 2;

const byte LED[10] = {
  B01111110,
  B00110000,
  B01101101,
  B01111001,
  B00110011,
  B01011011,
  B01011111,
  B01110000,
  B01111111,
  B01110011
};
 const byte C = B01001110;
 const byte H = B00110111;
 const byte minus = B00000001;

void displaysymbols(byte firstsymbol , byte secondsymbol){
  digitalWrite(8, LOW);  //8是個位數
  digitalWrite(9, HIGH);  //9是十位數

  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, LSBFIRST, firstsymbol);
  digitalWrite(latchPin, HIGH);

  delay(5);

  digitalWrite(8, HIGH);
  digitalWrite(9, LOW);

  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, LSBFIRST, secondsymbol);
  digitalWrite(latchPin, HIGH);  

  delay(5);

}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("DHT22 test!");
  dht.begin();
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(1000);
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  unsigned long startmillis = 0;
  unsigned long currentmillis = millis();
  if(currentmillis - startmillis > 500){
    displaysymbols(H, minus);
    startmillis = currentmillis;
  }
  currentmillis = millis();
  if(currentmillis - startmillis > 1000){
    displaysymbols(LED[round(h) / 10 % 10], LED[round(h) % 10]);
    startmillis = millis();
  }
  currentmillis = millis();
  if(currentmillis - startmillis > 500){
    displaysymbols(C, minus);
    startmillis = currentmillis;
  }
  currentmillis = millis();
  if(currentmillis - startmillis > 1000){
    displaysymbols(LED[round(t) / 10 % 10], LED[round(t) % 10]);
    startmillis = currentmillis;
  }
  currentmillis = millis();

  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print("%\t");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.println(" *c ");

  delay(1000);
}