#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>

#define DHTPIN A0   
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 16, 2);

RTC_DS1307 RTC;


void setup() {
  // put your setup code here, to run once:
  dht.begin();
	lcd.init();
  lcd.backlight();
  //lcd.setCursor(3,0);
  //lcd.print("Test DHT22");
  Serial.begin(115200);
  //Serial.println("Test DHT22");
  RTC.begin();

}

void loop() {
  // put your main code here, to run repeatedly:
  char stmp[17];
  DateTime now = RTC.now();
  char op = now.second()%2;
  lcd.setCursor(0,0);
  if(op==0) {
    /*
    lcd.print("DATE: ");
    lcd.print(now.year()); lcd.print("/");
    snprintf(stmp2, 15, "%02d", now.month());
    lcd.print(stmp2);
    lcd.print("/");
    snprintf(stmp2, 15, "%02d", now.day());
    lcd.print(stmp2);
    */
    snprintf(stmp, 17, "DATE: %4d/%02d/%02d", now.year(), now.month(), now.day());
  }
  else {
    /*
    lcd.print("TIME: ");
    snprintf(stmp2, 15, "%02d", now.hour());
    lcd.print(stmp2);
    lcd.print(":");
    snprintf(stmp2, 15, "%02d", now.minute());
    lcd.print(stmp2);
    lcd.print(":");
    snprintf(stmp2, 15, "%02d", now.second());
    lcd.print(stmp2);
    */
    snprintf(stmp, 17, "TIME: %02d/%02d/%02d  ", now.hour(), now.minute(), now.second());

  }
  lcd.print(stmp);
  stmp[17] = 0;
  //Serial.println(stmp);

  float T = dht.readTemperature();
  float H = dht.readHumidity();
  //Serial.println(String("T:")+String(T,1)+String("C"));
  //Serial.println(String("H:")+String(H,1)+String("%"));

  // Check if any reads failed and exit early (to try again).
  if (isnan(T) || isnan(H)) {
    Serial.println(F("Failed to read from DHT sensor!"));
  }
  else {
    /*
    lcd.setCursor(0,1);
    lcd.print("T:");
    lcd.print(String(T,1));
    lcd.print("C");
    lcd.print(", ");
    lcd.print("H:");
    lcd.print(String(H,1));
    lcd.print("%");
    */
    //char stmp[17];
    snprintf(stmp, 17, "T:%sC, H:%s%%", String(T,1).c_str(), String(H,1).c_str());
    lcd.setCursor(0,1);
    lcd.print(stmp);
    //Serial.println(stmp);
  }

  delay(500);

}