#include <Wire.h>                 // LCD I2C
#include <LiquidCrystal_I2C.h>    // LCD I2C
LiquidCrystal_I2C lcd(0x27,20,4); // LCD I2C

#include "HX711.h"                //Loadcell
const int LOADCELL_DOUT_PIN = 16; //Loadcell
const int LOADCELL_SCK_PIN  = 4;  //Loadcell
HX711 scale;

//#include <TimeLib.h>            //RTC I2C
#include "RTClib.h"               //RTC I2C
RTC_DS1307 rtc;                   //RTC I2C
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

//millis
unsigned long timer_rtc = millis();
unsigned long timer_hx = millis();
//-----------------------------------------------------------------------------------------------------------//
void setup()
{
  Wire.begin(); //I2C
  Serial.begin(115200); //Serial
  

  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);

  //GPIO begin
  
  
  if (! rtc.begin()) {  //RTC I2C
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }

  lcd.init(); // initialize the lcd 
}

//-----------------------------------------------------------------------------------------------------------//
void loop()
{
  DateTime now = rtc.now(); //RTC I2C
  //Serial.print("Current time: ");
  //Serial.print(now.year(), DEC);
  //Serial.print('/');
  //Serial.print(now.month(), DEC);
  //Serial.print('/');
  //Serial.print(now.day(), DEC);
  //Serial.print(" (");
  //Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  //Serial.print(") ");
  //Serial.print(now.hour(), DEC);
  //Serial.print(':');
  //Serial.print(now.minute(), DEC);
  //Serial.print(':');
  //Serial.print(now.second(), DEC);
  //Serial.println();

  if (millis() - timer_rtc >=200){ //RTC
   lcd.setCursor(0,0);
  lcd.print(now.year(), DEC);   //year ปี
   lcd.setCursor(5,0);
  lcd.print(now.month(), DEC);  //month เดือน
   lcd.setCursor(8,0);
  lcd.print(now.day(), DEC);    //day วัน
   lcd.setCursor(0,1);
  lcd.print(daysOfTheWeek[now.dayOfTheWeek()]);    //week
   lcd.setCursor(9,1);
  lcd.print(now.hour(), DEC);    //hour ชั่วโมง
   lcd.setCursor(12,1);
  lcd.print(now.minute(), DEC);  //minute นาที
   lcd.setCursor(15,1);
  lcd.print(now.second(), DEC);  //secound วินาที
  timer_rtc +=200;
  timer_rtc = millis();
  }

  if (millis() - timer_hx >=200){ //Loadcell
  if (scale.is_ready()) {
    long reading = scale.read();
    Serial.print("HX711 reading: ");
    Serial.println(reading);
  } else {
    Serial.println("HX711 not found."); //ไม่พบเซนเซอร์น้ำหนัก
  } 
  timer_hx +=200;
  timer_hx = millis();
  }
  
}