#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <NewPing.h>
const byte trigEchoTekPin = 10; 
unsigned long sure;

LiquidCrystal_I2C lcd(0x27,16,2);

void setup() {
  lcd.begin(16, 2); 
  lcd.init();
  lcd.clear();
  lcd.backlight();
  lcd.setCursor(1,0);              
  lcd.print("mesafe");
}
void loop() {
pinMode(trigEchoTekPin, OUTPUT); 
digitalWrite(trigEchoTekPin, 0); 
delayMicroseconds(10);
digitalWrite(trigEchoTekPin, 1);
delayMicroseconds(10);
pinMode(trigEchoTekPin, INPUT); 
sure = pulseInLong(trigEchoTekPin, 1);
lcd.setCursor(0, 1);
lcd.print((0.0343 * sure) / 2); 
lcd.setCursor(10, 1);
lcd.print("cm");
}