#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C osmli(0x27, 16, 2);
long duretion, distance;
void setup() {
   pinMode(3,OUTPUT);/// t
   pinMode(4,INPUT);///eco

   osmli.init();
   osmli.backlight();
   osmli.clear();  
 

}

void loop() {
  osmli.clear();
 
  digitalWrite(3,0);
  delayMicroseconds(2);
  digitalWrite(3,1);
  delayMicroseconds(10);
  digitalWrite(3,0);

  duretion = pulseIn(4,1);
  distance = (duretion/2)*0.0343;
  osmli.setCursor(5,0);
  osmli.print("distance =");
  osmli.setCursor(6,1);
  osmli.print(distance);
  delay(500);
}