#include <LiquidCrystal_I2C.h>
const int trigPin = 25;
const int echoPin = 26;

int lcdColumns = 16;
int lcdRows = 2;
#define address 0x27

LiquidCrystal_I2C lcd (address, lcdColumns,lcdRows); 

#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701

long duration;
float distanceCm;
float distanceInch;

void setup() {
  Serial.begin(115200); 
  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT); 
  
  lcd.init();
  lcd.backlight();
  lcd.print("IoT Club");
}

void loop() {

  duration = pulseIn(echoPin, HIGH);
  
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
    
  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, 1);
  lcd.print(distanceCm);
  lcd.print("c||");
  lcd.print(distanceInch);
  lcd.print("i");
  
  delay(1000);
}