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

int ldr=A0;//Set A0(Analog Input) for LDR.
int value=0;


int IR1 = 2;
int IR2 = 3;
int IR3 = 4;
int val1 = 0;
int val2 = 0;
int val3 = 0;

void setup() {
  // put your setup code here, to run once:

pinMode(8,OUTPUT);
pinMode(7,OUTPUT);
pinMode(6,OUTPUT);
Serial.begin(9600);
lcd.init();
lcd.backlight();
lcd.setCursor(0, 0);
lcd.print("Smart Parking");

}

void loop() {
 
  Serial.println(value);
  value=analogRead(ldr);//Reads the Value of LDR(light).

 if(value<300)
  {
digitalWrite(8,HIGH);
digitalWrite(7,HIGH);
digitalWrite(6,HIGH);
  }
  else
  {
digitalWrite(8,LOW);
digitalWrite(7,LOW);
digitalWrite(6,LOW);
  } 

  val1 = digitalRead(IR1);
  val2 = digitalRead(IR2);
  val3 = digitalRead(IR3);
  
  if (val1 == 0) {
    digitalWrite(8, HIGH);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("SLOT A");
    lcd.setCursor(0, 1);
    lcd.print("OCCUPIED");
  }
  else {
    digitalWrite(8, LOW);
  }
  if (val2 == 0) {
    digitalWrite(7, HIGH);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("SLOT B");
    lcd.setCursor(0, 1);
    lcd.print("OCCUPIED");
  }
  else {
    digitalWrite(7, LOW);
  }
  if (val3 == 0) {
    digitalWrite(6, HIGH);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("SLOT C");
    lcd.setCursor(0, 1);
    lcd.print("OCCUPIED");
  }
  else {
    digitalWrite(6, LOW);
}
}