#include<LiquidCrystal_I2C.h>
#include<Wire.h>

const int trigPin = 9;
const int echoPin = 10;
float duration, distance;

//initialize the liquid crystal library
//the first parameter is  the I2C address
//the second parameter is how many rows are on your screen
//the  third parameter is how many columns are on your screen
LiquidCrystal_I2C lcd(0x27,  16, 2);

void setup() {
  
  //initialize lcd screen
  lcd.init();
  // turn on the backlight
  lcd.backlight();

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  Serial.begin(9600);
}
void loop() {
  
	digitalWrite(trigPin, LOW);  
	delayMicroseconds(2);  
	digitalWrite(trigPin, HIGH);  
	delayMicroseconds(10);  
	digitalWrite(trigPin, LOW);  

  duration = pulseIn(echoPin, HIGH);
  distance = (duration*.0343)/2;

  //wait  for a second
  delay(1000);

  lcd.setCursor(0,0);
  lcd.print("Dist: ");
  lcd.println(distance);

 if (distance <= 100){
    lcd.print("");
    lcd.setCursor(0,1);
    lcd.print("Object near!!!!!");
  }
  else{
    lcd.print("");
    lcd.setCursor(0,1);
    lcd.print("All clear.......");
  }
}