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

LiquidCrystal_I2C lcd(0x27, 16, 2);

UltraDistSensor mysensor;
float reading;
int piezoPin = 8;

void setup() {
    lcd.init();                      // initialize the lcd 
    lcd.backlight();
    Serial.begin(9600);
    mysensor.attach(12,13);//Trigger pin , Echo pin
}

void loop() {
    reading = mysensor.distanceInCm();
    if (reading >= 400 || reading <= 2) {
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("Out of range");
        Serial.print("Out of range");
      }

     else {
    
       lcd.setCursor(0,0);
       lcd.print("Distance is ");
       lcd.setCursor(0,1);
       lcd.print("             ");
       lcd.setCursor(0,1);
       lcd.print(reading);
       lcd.print("cm");
       Serial.print(reading);
     }

     delay(100);

     if (reading <=30) {
      tone(piezoPin, 1000, 2000);
      };
      

    
}