#include <LiquidCrystal_I2C.h> 
LiquidCrystal_I2C lcd(0x27,16,2);
float cm;
float inches;
long readUltrasonicDistance(int triggerPin, int echoPin)
{
    pinMode(triggerPin,OUTPUT); // Clear the trigger
    digitalWrite(triggerPin,LOW);
    delayMicroseconds(2);
    // Sets the trigger pin to HIGH state form10 microseconds
    digitalWrite(triggerPin,HIGH);
    delayMicroseconds(10);
    digitalWrite(triggerPin,LOW);
    pinMode(echoPin,INPUT);
    // Reads the echo pin, and returns
    // the sound wave travel time in microseconds 
    return pulseIn(echoPin, HIGH);
}
void setup()
{
  Serial.begin(9600);
  lcd.init(); // initialize the led
  // Print a message to the LCD. 
  lcd.backlight();
  lcd.print("--> Distance<--");
    delay(3000); 
    lcd.clear();
}
void loop()
{
  cm = 0.0344/2*readUltrasonicDistance(3,2);
  inches = (cm / 2.54);
/*
  	Serial.print(""lnches "");
  	Serial.print(inches,1);
  	Serial.print(""\t"");
 	Serial.print(""cm "");
 	Serial.println(cm,1);
  */
lcd.setCursor(0,0);
lcd.print("lnches"); 
lcd.setCursor(4,0); 
lcd.setCursor(12,0); 
lcd.print("cm"); 
lcd.setCursor(1,1); 
lcd.print(inches,1); 
lcd.setCursor(11,1); 
lcd.print(cm, 1); 
lcd.setCursor(14,1); 
delay(2000); 
lcd.clear();
}