#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);
const byte trigEcho = 10;
unsigned long sure;
void setup() {
lcd.backlight();
lcd.init();                   
lcd.init();
lcd.begin(16, 2); 
lcd.print("Mesafe");
}
void loop() { 
pinMode(trigEcho, OUTPUT); 
digitalWrite(trigEcho, 0); 
delayMicroseconds(10);
digitalWrite(trigEcho, 1); 
delayMicroseconds(10); 
pinMode(trigEcho, INPUT); 
sure = pulseInLong(trigEcho, 1);
lcd.setCursor(0, 1);
lcd.print((0.0343 * sure) / 2);
lcd.setCursor(6, 1);
lcd.print("cm"); }