#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

#define ECHO_PIN 2
#define TRIG_PIN 3


void setup() {
  // put your setup code here, to run once:
  lcd.init();
  lcd.backlight();

  Serial.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(12,OUTPUT);
  pinMode(13,OUTPUT);
}

float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}

void loop() {
  // put your main code here, to run repeatedly:
  float distance = readDistanceCM();
  
  while (distance<10)
  {
    lcd.clear();
   lcd.setCursor(2,0);
   lcd.print("Too close"); 
   delay(500);
   digitalWrite(12, HIGH);
   distance = readDistanceCM();
  }
  digitalWrite(12, LOW);
  while (distance>200)
  {
    lcd.clear();
   lcd.setCursor(2,0);
   lcd.print("Too Far");
   digitalWrite(13, HIGH);
   delay(500);
   distance = readDistanceCM();
  }
  digitalWrite(13, LOW);
  lcd.clear();
  lcd.setCursor(2,0);
  lcd.print(distance);
  delay(500);

}