#include <LiquidCrystal_I2C.h> //library LCD
#include <RTClib.h> //library Real-Time Clock
#include <DHT.h> //library DHT22
#include <Wire.h>

#define DHTPIN 7 //pin data DHT22 conect ke pin 7 Arduino
#define DHTTYPE DHT22 //jenis sesnor DHT22

//pengaturan kadar air
#define Sensor A0
#define wet 620
#define dry 900

float nilai_sensor; //membaca nilai sensor kadar air analog
float n_akhir; //membaca nilai kadar air yang telah dikalibrasikan

RTC_DS1307 rtc; //set up real time clock
LiquidCrystal_I2C lcd (0x27, 20, 4);
DHT dht (DHTPIN, DHTTYPE); //setup pin dan jenis DHTT ke library

char daysOfTheWeek[7][12] = {"Minggu", "Senin", "Selasa", "Rabu", "Kamis", "Jum'at", "Sabtu"};

void setup() {
  Serial.begin(9600);
  Serial.println("Sistem Monitoring Suhu, Kelembaban dan Kadar Air");
  lcd.begin(20, 4);
  rtc.begin();
  Wire.begin();
  dht.begin();

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

}

void loop() 
{
  

  DateTime now = rtc.now();

  //menampilkan waktu di lcd
  lcd.setCursor(0,1);
  lcd.print("JAM :");
  lcd.print(" ");
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.print(now.second(), DEC);
  lcd.print(" ");

  //menampilkan tanggal di lcd
  lcd.setCursor(0,0);
  lcd.print("TGL :");
  lcd.print(" ");

  //lcd.print(daysOfTheWeek[now.dayOfTheWeek()]);
  lcd.print(" ");
  lcd.print(now.day(), DEC);
  lcd.print('/');
  lcd.print(now.month(), DEC);
  lcd.print('/');
  lcd.print(now.year(), DEC);
  lcd.print(" ");

  //menampilkan tanggal dan jam secara real-time di serial monitor
  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();

  float T = dht.readTemperature(); //membaca temperature
  float h = dht.readHumidity(); //membaca kelembaban

  //menampilkan data suhu di LCD
  lcd.setCursor(0,2);
  lcd.print("T:");
  lcd.print(T,1);
  lcd.print(" ");
  lcd.print("C");

  //menampilkan data kelembaban di LCD
  lcd.setCursor(11,2);
  lcd.print("H:");
  lcd.print(h,1);
  lcd.print(" ");
  lcd.print("%");

  //menampilkan data suhu, kelembaban dan kadar air di serial monitor
  Serial.print("Suhu = ");
  Serial.print(T);
  Serial.print(" C, Kelembaban = ");
  Serial.print(h);
  Serial.print(" % ");
  Serial.print("Nilai Analog = ");//menampilkan nilai analog pada serial monitor
  Serial.println(nilai_sensor);
  Serial.print("Nilai Kadar Air = ");//menampilkan hasil konversi nilai analog ke persen
  Serial.println(n_akhir);

  Serial.println();

  // Instruksi kadar air untuk mwngubah nilai analog menjadi persen
  nilai_sensor = analogRead(A0);
  n_akhir = map(analogRead(A0), dry, wet, 0, 100); //Nilai sensor tertinggi, terendah
  if (n_akhir >= 100){
  n_akhir = 100;
  }
 
  else if (n_akhir<0)
  {
   n_akhir=0;
  }


  //menampilkan data kadar air di lcd
  lcd.setCursor(0,3);
  lcd.print("KADAR AIR : ");
  lcd.setCursor(11,3);
  lcd.print(n_akhir,1);
  lcd.print(" % ");
  lcd.print("");

  delay(3000); //delay waktu selama 3 detik
  
}