#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd (0x27,16,2);

const float GAMMA = 0.7;
const float RL10 = 50;

#define lampu1 2
#define lampu2 6
#define lampu3 10

#define lampu4 11
#define lampu5 12
#define lampu6 13

#define lampu7 3
#define lampu8 4
#define lampu9 7

void setup()
{
  pinMode(lampu1, OUTPUT);
  pinMode(lampu2, OUTPUT);
  pinMode(lampu3, OUTPUT);

  pinMode(lampu4, OUTPUT);
  pinMode(lampu5, OUTPUT);
  pinMode(lampu6, OUTPUT);

  pinMode(lampu7, OUTPUT);
  pinMode(lampu8, OUTPUT);
  pinMode(lampu9, OUTPUT);
  
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.setCursor (2,0);
  lcd.print("Lampu Jalan");
  lcd.setCursor (3,1);
  lcd.print("Otomatis");
  delay (1000);
}

void loop()
{
  //untuk Sensor 1:
  int analogValue = analogRead(A7);
  float voltage = analogValue / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  //untuk Sensor 2:
  int analogValue2 = analogRead(A0);
  float voltage2 = analogValue2 / 1024. * 5;
  float resistance2 = 2000 * voltage2 / (1 - voltage2 / 5);
  float lux2 = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance2, (1 / GAMMA));

  //untuk Sensor 3:
  int analogValue3 = analogRead(A3);
  float voltage3 = analogValue3 / 1024. * 5;
  float resistance3 = 2000 * voltage3 / (1 - voltage3 / 5);
  float lux3 = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance3, (1 / GAMMA));

  Serial.print("Lux Sensor 1: ");
  Serial.println(lux);
  Serial.print("Lux Sensor 2: ");
  Serial.println(lux2);
  Serial.print("Lux Sensor 3: ");
  Serial.println(lux3);
 
  lcd.clear();
  lcd.setCursor (0,0);
  lcd.print("S1:");
  lcd.print (lux);

  lcd.setCursor (7,0);
  lcd.print(" S2:");
  lcd.print (lux2);

  lcd.setCursor (0,1);
  lcd.print("S3:");
  lcd.print (lux3);

  //Sensor 1:
  if (lux <= 50)
  {
    digitalWrite(lampu1, HIGH);
    digitalWrite(lampu2, HIGH);
    digitalWrite(lampu3, HIGH);
  }
  else if (lux > 50 && lux <= 100)
  {
    digitalWrite(lampu1, HIGH);
    digitalWrite(lampu2, HIGH);
    digitalWrite(lampu3, LOW);
  }
  else if (lux > 100 && lux <= 150)
  {
    digitalWrite(lampu1, HIGH);
    digitalWrite(lampu2, LOW);
    digitalWrite(lampu3, LOW);
  }
  else if (lux > 150 )
  {
    digitalWrite(lampu1, LOW);
    digitalWrite(lampu2, LOW);
    digitalWrite(lampu3, LOW);
  }

  //Sensor 2:
  if (lux2 <= 50)
  {
    digitalWrite(lampu4, HIGH);
    digitalWrite(lampu5, HIGH);
    digitalWrite(lampu6, HIGH);
  }
  else if (lux2 > 50 && lux2 <= 100)
  {
    digitalWrite(lampu4, HIGH);
    digitalWrite(lampu5, HIGH);
    digitalWrite(lampu6, LOW);
  }
  else if (lux2 > 100 && lux2 <= 150)
  {
    digitalWrite(lampu4, HIGH);
    digitalWrite(lampu5, LOW);
    digitalWrite(lampu6, LOW);
  }
  else if (lux2 > 150 )
  {
    digitalWrite(lampu4, LOW);
    digitalWrite(lampu5, LOW);
    digitalWrite(lampu6, LOW);
  }

  //Sensor 3:
  if (lux3 <= 50)
  {
    digitalWrite(lampu7, HIGH);
    digitalWrite(lampu8, HIGH);
    digitalWrite(lampu9, HIGH);
  }
  else if (lux3 > 50 && lux3 <= 100)
  {
    digitalWrite(lampu7, HIGH);
    digitalWrite(lampu8, HIGH);
    digitalWrite(lampu9, LOW);
  }
  else if (lux3 > 100 && lux3 <= 150)
  {
    digitalWrite(lampu7, HIGH);
    digitalWrite(lampu8, LOW);
    digitalWrite(lampu9, LOW);
  }
  else if (lux3 > 150 )
  {
    digitalWrite(lampu7, LOW);
    digitalWrite(lampu8, LOW);
    digitalWrite(lampu9, LOW);
  }

  delay(1000);
}