#include <LiquidCrystal_I2C.h>

const int buzzer = 9;
LiquidCrystal_I2C lcd(0x27,16,2);  /*I2C scanned address defined + I2C screen size*/

void setup() {
  // put your setup code here, to run once:
  pinMode(buzzer , OUTPUT);
  lcd.init();  /*LCD display initialized*/
  lcd.clear();     /*Clear LCD Display*/
  lcd.backlight();      /*Turn ON LCD Backlight*/
  lcd.setCursor(0,0);   /*Set cursor to Row 1*/
  lcd.print("I2C LCD Nano");
  delay(1000);
  lcd.clear();
}

void loop() {
  // put your main code here, to run repeatedly:
    if (Serial.available() > 0)
    {
      String data = Serial.readStringUntil('\n');
      if (data == "active")
      {
        tone(buzzer , 3000 , 1000);
        Lcd_Show_Text();
      }
      else
      {
        noTone(buzzer);
      }
    }
}

void Lcd_Show_Text()
{
  lcd.setCursor(0,0);   /*Set cursor to Row 1*/
  lcd.print("You are parking"); /*print text on LCD*/
  lcd.setCursor(0,1);
  lcd.print("in a private");
  delay(3000);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("parking, please");
  lcd.setCursor(0,1);
  lcd.print("move your car");
  delay(3000);
  lcd.clear();
}