#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>
LiquidCrystal_I2C lcd(0x27,16,2);
Servo servo;

const int entryPIR = 13;
const int exitPIR = 16;
int parkingSlots = 5;
int inPIRVal;
int outPIRVal;
int flag1 = 1;
int flag2 = 1;

void setup() {
  // put your setup code here, to run once:
  pinMode(21, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(entryPIR, INPUT);
  pinMode(exitPIR, INPUT);
  Serial.begin(9600);
  lcd.init();
  servo.attach(32);
}

void loop() {
  // put your main code here, to run repeatedly:
  lcd.setCursor(0,0);
  inPIRVal = digitalRead(entryPIR);
  outPIRVal = digitalRead(exitPIR);

  if(inPIRVal && flag1){
    parkingSlots--;
    servo.write(0);
    lcd.print("Vacant spots: ");
    lcd.print(parkingSlots);
    delay(5000);

    flag1 = 0;
  }else if(inPIRVal == 0){
    flag1 = 1;
    servo.write(90);
  }

  if(outPIRVal && flag2){
    parkingSlots++;
    servo.write(0);
    lcd.print("Vacant spots: ");
    lcd.print(parkingSlots);
    delay(5000);

    flag2 = 0;
  }else if(inPIRVal == 0){
    flag2 = 1;
    servo.write(90);
  }

  // lcd.print("Vacant spots: ");
  // lcd.print(parkingSlots);
}