// Projek Smart Hydroponics dengan Arduino Uno //
//                Dandi Diantoro               //
//                 Nanda Diki S.               //

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

int echoPin = 5;
int trigPin = 4;
int pomair = 6;
int lampu = 3;
int Kipas = 2;
int ldrpin = A0;
int sensorph = A1;
int sensorppm = A2;
int nilaisensorph;
int nilaisensorppm;
const float GAMMA = 0.7;
const float RL10 = 50;
#define SERIAL_OPTION 0 
#define DHTPIN 1     
#define DHTTYPE DHT22

RTC_DS1307 RTC;
DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  // Serial.begin(9600);
  pinMode(echoPin, INPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(pomair, OUTPUT);
  pinMode(lampu, OUTPUT);
  pinMode(Kipas, OUTPUT);
  pinMode(sensorph, INPUT);
  // pinMode(sensorppm, INPUT);

  RTC.begin();
  dht.begin();

  lcd.init();   
  lcd.backlight(); 


  lcd.setCursor(1,0);
  lcd.print("Suhu : ");
  lcd.setCursor(1,1);
  lcd.print("Hum : ");
  lcd.setCursor(1,2);
  lcd.print("Cahaya : ");
  lcd.setCursor(1,3);
  lcd.print("Air : ");

  // Serial.println("Smart Hidroponik");
  // Serial.println("Dandi Diantoro");
}

float ultrasonik(){ 
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  int durasiPantulan = pulseIn(echoPin, HIGH);
  return durasiPantulan * 0.034 / 2;
}

void loop() {

  // nilaisensorph= analogRead(sensorph);
  // nilaisensorppm= analogRead(sensorppm);
  // Serial.println(nilaisensorph);
  // Serial.println(nilaisensorppm);

  int ldrValue = analogRead(ldrpin); 
  float voltase = ldrValue / 1024. * 5; 
  float resistansi = 2000 * voltase / (1-voltase / 5); 
  float kecerahan = pow(RL10 * 1e3 * pow(10, GAMMA) / resistansi, (1/GAMMA)); 

  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  lcd.setCursor(8,0);
  lcd.print(temperature);
  lcd.setCursor(7,1);
  lcd.print(humidity);

  DateTime now = RTC.now();

  float jarak = ultrasonik();
  if(jarak>200)  {
    digitalWrite(pomair, LOW);
    lcd.setCursor(8,3);
    lcd.print("Cukup OFF");
  }
  else if(jarak<=200) {
    digitalWrite(pomair, HIGH);
    lcd.setCursor(8,3);
    lcd.print("Kurang ON  ");
  }
  if (temperature>36.00 || humidity<=65.00) {
    digitalWrite(Kipas, HIGH);
    lcd.setCursor(14,0);
    lcd.print("ON ");
    lcd.setCursor(13,1);
    lcd.print("ON  ");
  }
  else if (temperature<=32.00 || humidity>78.00) {
    digitalWrite(Kipas, LOW);
    lcd.setCursor(14,0);
    lcd.print("OFF  ");
    lcd.setCursor(13,1);
    lcd.print("OFF  ");
  }
  else {
    digitalWrite(Kipas, LOW);
    lcd.setCursor(14,0);
    lcd.print("OFF");
    lcd.setCursor(13,1);
    lcd.print("OFF");
  }

  if(kecerahan > 100){ 
    lcd.setCursor(10,2);
    lcd.print("Terang OFF");
    digitalWrite(lampu, LOW);
  }
  else{
    lcd.setCursor(10,2);
    lcd.print("Redup ON "); 
    digitalWrite(lampu, HIGH);
  }
  if ((now.hour() == 7 && now.minute() >= 30 && now.minute() <= 59) ||
      (now.hour() == 8 && now.minute() >= 0 && now.minute() <= 0)) {
    digitalWrite(lampu, HIGH);
  } else if ((now.hour() == 16 && now.minute() >= 0 && now.minute() <= 30) ||
             (now.hour() == 17 && now.minute() >= 0 && now.minute() <= 30)) {
    digitalWrite(lampu, HIGH);
  } else {
    digitalWrite(lampu, LOW);
  }
  delay(100);
}