#include <LiquidCrystal_I2C.h>


LiquidCrystal_I2C lcd(0x27, 16, 2); 
int trigPin = 9;   
int echoPin = 10;    

float duration_us, distance_cm;

void setup() {
  lcd.init();               
  lcd.backlight();          
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT); 
}
void loop() {
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration_us = pulseIn(echoPin, HIGH);
  distance_cm = (0.034 * duration_us)/2;
  

   if(distance_cm < 200)
  {
    lcd.setCursor(0, 0);
    lcd.print("Distance: ");
    lcd.print(distance_cm);
    lcd.setCursor(0,1);
    lcd.print("Somia 10657");
    digitalWrite(9,HIGH);
  }
  else
  {
    digitalWrite(10, LOW);
    lcd.setCursor(0,0);
    lcd.println("Alert");
  }
  delay(500);
}