#include <LiquidCrystal_I2C.h>

int lcdColumns = 16;
int lcdRows = 2;
const int trigPin =5;
const int echoPin = 18;
long duration;
float distanceCm;
float distanceInch;

#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);  
void setup(){
  lcd.init();                  
  lcd.backlight();
  Serial.begin(115200); 
  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT); 
}

void loop(){

  
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  duration = pulseIn(echoPin, HIGH);
  distanceCm = duration * SOUND_SPEED/2;
  distanceInch = distanceCm * CM_TO_INCH;
  
  
  Serial.print("Distance (cm): ");
  Serial.println(distanceCm);
  Serial.print("Distance (inch): ");
  Serial.println(distanceInch);
  
  lcd.setCursor(0, 0);
  lcd.print("Distance");
  lcd.setCursor(0,1);
  lcd.print(distanceCm);
  lcd.print(" cm");
  delay(1000);
  lcd.clear(); 

  
}