#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <OneWire.h>
#include <Wire.h>
#include <DallasTemperature.h>

int ldrPin = A1;
//int potPin = A1;
int potValue = 6.4;
int ledPin = 7;
int pumpPin = 6;
int DhtPin = 10;
const float GAMMA = 0.7;
const float RL10 = 50;

OneWire onewire(DhtPin);
//DallasTemperature sensor (&oneWire);

LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  pinMode(ldrPin, INPUT);
  pinMode(DhtPin, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(pumpPin, OUTPUT);
  //pinMode(potPin, A1);
  //rtc.begin();
  //sensor.begin();
  lcd.init();
  lcd.backlight();
}

void loop() {
  lcd.setCursor(15, 1);
  lcd.print("pH:");
  //lcd.Value = analogRead(potPin);
  lcd.print(potValue);

  //sensor.requestTemperatures();
  //float tempC = sensor.getTempCByIndex(0);

  lcd.setCursor(0, 1);
  lcd.print("Suhu: ");
  //lcd.print(tempC);
  lcd.print((char)223);
  lcd.print("C ");

  if (pumpPin < 35) {
    digitalWrite(pumpPin, HIGH);
    lcd.setCursor(10, 3);
    lcd.print("Pump: OFF");
  } else {
    digitalWrite(pumpPin, LOW);
    lcd.setCursor(10, 3);
    lcd.print("Pump: ON");
  } 

  int ldrValue = analogRead(ldrPin);
  ldrValue = map(ldrValue, 0, 1023, 0,255);
  float voltase = ldrValue / 1024. * 5;
  float resistansi = 2000 * voltase / (1-voltase / 5);
  float kecerahan = pow(RL10 * 1e3 * pow(10, GAMMA) / resistansi, (1/GAMMA));

  if (ldrValue < 140) {
    digitalWrite(ledPin, LOW);
    lcd.setCursor(0, 3);
    lcd.print("Lamp: ON");
  } else {
    digitalWrite(ledPin, HIGH);
    lcd.setCursor(0, 3);
    lcd.print("Lamp: OFF");
  }

  lcd.setCursor(0, 2);
  lcd.print("Lux: ");
  lcd.print(ldrValue);
  lcd.print("   ");

  delay(100);
}