#include <LiquidCrystal_I2C.h>

int ledPin = 2; 
int inputPin = 12;
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;
int people_num = 0;
LiquidCrystal_I2C lcd(0x27,16,2);

void setup() {
  // put your setup code here, to run once:
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);     // declare sensor as input
  Serial.begin(115200);
  lcd.init();
  lcd.print("Welcome to xxx");
  lcd.setCursor(1,1);
  lcd.print("Park ! ");
  

}

void loop() {

  

  val = digitalRead(inputPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(ledPin, HIGH);  // turn LED ON
    if (pirState == LOW) {
      // we have just turned on
      lcd.clear();
      Serial.println("Motion detected!");
      people_num++;
      //Serial.println("We have " + String(people_num) + " people arrived");
      lcd.print(String(people_num));
      lcd.print("\n");
      lcd.print("people arrived");
      
      // We only want to print on the output change, not state
      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW); // turn LED OFF
    if (pirState == HIGH) {
      // we have just turned of
      lcd.clear();
      lcd.print("Wait for people");
      // We only want to print on the output change, not state
      pirState = LOW;
    }
  }
  // lcd.setCursor(0,0);
  // lcd.print("haha");
}