#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);

const int pinSensor= A0;
const int buzzer = 2;
const int prag = 30;

void setup() {
  pinMode(buzzer,OUTPUT);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("Distanta:");


}

void loop() {
  int valoare = analogRead(pinSensor);
  int distanta = map(valoare,0,1023,10,150);
  lcd.setCursor(0,1);
  lcd.print("           ");
  lcd.setCursor(0,1);
  lcd.print(distanta);
  lcd.print(" cm");
  
  if(distanta < prag){
    tone(buzzer, 1000);  
    delay(500);
    noTone(buzzer);
    
    
  delay(200);

}
}