#include<LiquidCrystal_I2C.h> //Library LCD I2C
#include<HX711_ADC.h>  //Library Load Cell
#include<RTClib.h> //Library RTC
#include<DHT.h> //Library DHT
#include <Adafruit_Sensor.h>
#include<EEPROM.h>
#include<Wire.h>

//LCD I2C
LiquidCrystal_I2C lcdtimeanddate(0x27,16,2);
LiquidCrystal_I2C lcdairquality(0x26,16,2);
LiquidCrystal_I2C lcdhmdtyandtemp(0x25,16,2);
LiquidCrystal_I2C lcdload(0x24,16,2);

//Load Cell
const int HX711_dout = 12;
const int HX711_sck = 13;
HX711_ADC LoadCell(HX711_dout, HX711_sck);
const int calVal_eepromAdress = 0;
long x;

//RTC
RTC_DS3231 rtc;
char dataHari[7][12] = {"Minggu", "Senin", "Selasa", "Rabu", "Kamis", "Jumat", "Sabtu"};
String hari;
int tanggal, bulan, tahun, jam, menit, detik;
float suhu;

//DHT
#define DHTPIN 7     // Pin untuk DHT
#define DHTTYPE DHT22   // Jenis DHT (DHT 22)
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino
int h;  //Kelembapan
int t; //Suhu

//MQ135 (AQ Sensor)
int buz = 8;  //buzzer
const int aqsensor = A0;  //output of mq135 connected to A0 pin of Arduino
int threshold = 250;      //Threshold level for Air Quality


void setup() {
  Serial.begin(9600);

  //Load Cell
  pinMode(HX711_dout, INPUT);
  delay(10);
  Serial.println();
  Serial.println("Memulai...");
  lcdload.init();
  LoadCell.begin();
  lcdload.setCursor(0,0);
  lcdload.print("Brt: ");
  lcdload.setCursor(12,0);
  lcdload.print("0");
  lcdload.setCursor(14,0);
  lcdload.print("gr");
  float calibrationValue; 
  calibrationValue = 696.0; 
  EEPROM.get(calVal_eepromAdress, calibrationValue);
  long stabilizingtime = 2000; 
  boolean _tare = true; 
  LoadCell.start(stabilizingtime, _tare);
  if (LoadCell.getTareTimeoutFlag()) {
    Serial.println("Timeout, cek kabel MCU>HX711 pastikan sudah tepat");
    while (1);
  }
  else {
    LoadCell.setCalFactor(calibrationValue);
    Serial.println("Startup selesai");
  }

  //RTC
  if (! rtc.begin()) {
    Serial.println("RTC Tidak Ditemukan");
    Serial.flush();
    abort();
  }

  //Atur Waktu, upload untuk set waktu, kemudian beri komentar lalu upload kembali
  //rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  //rtc.adjust(DateTime(2022,5,01,13,57,0));

  //DHT
  dht.begin();
  Serial.println("Temperature and Humidity Sensor Test");
  lcdhmdtyandtemp.init(); //initialize the lcd
  lcdhmdtyandtemp.backlight(); //open the backlight

  //MQ135 (AQ SENSOR)
  pinMode (buz,OUTPUT);     // buzzer is connected as Output from Arduino
  pinMode (aqsensor,INPUT); // MQ135 is connected as INPUT to arduino
  lcdairquality.clear();              // clear lcd
  lcdairquality.init ();         // consider 16,2 lcd

}

void loop() {
  //Load Cell
  static boolean newDataReady = 0;
  const int serialPrintInterval = 0; 
  if (LoadCell.update()) newDataReady = true;
  if (newDataReady) {
    if (millis() > x + serialPrintInterval) {
      int i = LoadCell.getData();
      if(i<0){
        i=0;
      }
      tampil(i);
      newDataReady = 0;
      t = millis();
    }
  }
  if(Serial.available() > 0){
    float i;
    char inByte = Serial.read();
    if (inByte == 'x') LoadCell.tareNoDelay();
  }
  if (LoadCell.getTareStatus() == true) {
    Serial.println("Tara selesai");
  }

  //RTC
  DateTime now = rtc.now();
  hari    = dataHari[now.dayOfTheWeek()];
  tanggal = now.day();
  bulan   = now.month();
  tahun   = now.year();
  jam     = now.hour();
  menit   = now.minute();
  detik   = now.second();
  suhu    = rtc.getTemperature();
  lcdtimeanddate.setCursor(0,0);
  lcdtimeanddate.print(String() +hari+"," +tanggal+"-"+bulan+"-"+tahun);
  lcdtimeanddate.setCursor(0,1);
  lcdtimeanddate.print(String() +jam+":" +menit+":"+detik+" " +suhu+".C ");
  delay(1000);

  //DHT
  h = dht.readHumidity();
  t = dht.readTemperature();
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" %, Temp: ");
  Serial.print(t);
  Serial.println(" ° Celsius");
  lcdhmdtyandtemp.setCursor(0, 0);
  lcdhmdtyandtemp.print("TEMP :");
  lcdhmdtyandtemp.print(t);
  lcdhmdtyandtemp.print("C");
  lcdhmdtyandtemp.setCursor(1, 0);
  lcdhmdtyandtemp.print("HMDTY:");
  lcdhmdtyandtemp.print(h);
  lcdhmdtyandtemp.print("%"); 
  delay(1000);

  //MQ135 (AQ Sensor)
  int ppm = analogRead(aqsensor); //read MQ135 analog outputs at A0 and store it in ppm
  Serial.print("Air Quality: ");  //print message in serail monitor
  Serial.println(ppm);            //print value of ppm in serial monitor
  lcdairquality.setCursor(0,0);             // set cursor of lcd to 1st row and 1st column
  lcdairquality.print("AQ   : ");      // print message on lcd
  lcdairquality.print(ppm);                 // print value of MQ135
  if (ppm > threshold)            // check is ppm is greater than threshold or not
    {
      lcdairquality.setCursor(1,0);         //jump here if ppm is greater than threshold
      lcdairquality.print("Level:HIGH");
      Serial.println("Level:HIGH");     
      tone(1000,200);         //blink led with turn on time 1000mS, turn off time 200mS
      digitalWrite(buz,HIGH);     //Turn ON Buzzer
    }
  else
    {
      digitalWrite(buz,LOW);   //Turn off Buzzer
      lcdairquality.setCursor(1,0);
      lcdairquality.print ("Level:Good");
      Serial.println("Level:Good");
    }  
  delay (500);
}

void tampil(int j){
  lcdload.setCursor(4,0);
  lcdload.print("          ");
  if(j<10){
    lcdload.setCursor(12,0);  
  }else if(j<100 && j>=10){
    lcdload.setCursor(11,0);
  }else if(j<1000 && j>=100){
    lcdload.setCursor(10,0);
  }else if(j<10000 && j>=1000){
    lcdload.setCursor(9,0);
  }else if(j<100000 && j>=10000){
    lcdload.setCursor(8,0);
  }else if(j<1000000 && j>=100000){
    lcdload.setCursor(7,0);
  }else if(j<10000000 && j>=1000000){
    lcdload.setCursor(6,0);
  }else if(j<100000000 && j>=10000000){
    lcdload.setCursor(5,0);
  }else{
    lcdload.setCursor(4,0);
  }
  lcdload.print(j);
}