#include <LiquidCrystal.h>

const int u_trig = 9;
const int u_echo = 10;

unsigned long laikas = 0;

const int v_garso = 330;

float atstumas = 0;

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  lcd.begin(16, 2);

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(u_trig, LOW);
  delayMicroseconds(2);
  digitalWrite(u_trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(u_trig, LOW);

  laikas = pulseIn(u_echo, HIGH);
  

  atstumas = (v_garso * laikas) / 2 /10000;

  Serial.println(atstumas);
  lcd.setCursor(0, 0);
  lcd.print(atstumas);

  delay(1000);

}