#define trigPin 13
#define echoPin 12
#define SOUND_SPEED 0.034 //define sound speed in cm/uS
#define CM_TO_INCH 0.393701
#include <Wire.h>
#include <LiquidCrystal_I2C.h> //LiquidCrystal I2C

LiquidCrystal_I2C lcd(0x27, 16, 2);

long duration;
float distanceCm;
float distanceInch;

void setup() {
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input
lcd.init();
  lcd.backlight();
}

void loop() {
  // Clears the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);

  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(0,0);  lcd.print("distanceCm : ");
   lcd.setCursor(14,0);  lcd.print(distanceCm);
if(distanceCm<=0){
  lcd.setCursor(0,2);  lcd.print("*");
}
else if(distanceCm>=0 && distanceCm<=25 ){
  lcd.setCursor(0,2);  lcd.print("** ");
}
else if(distanceCm>=26 && distanceCm<=50 ){
  lcd.setCursor(0,2);  lcd.print("***  ");
}
else if(distanceCm>=51 && distanceCm<=75 ){
  lcd.setCursor(0,2);  lcd.print("****   ");
}
else if(distanceCm>=76 && distanceCm<=101 ){
  lcd.setCursor(0,2);  lcd.print("*****    ");
}
else if(distanceCm>=102 && distanceCm<=126 ){
  lcd.setCursor(0,2);  lcd.print("******     ");
}
else if(distanceCm>=127 && distanceCm<=151 ){
  lcd.setCursor(0,2);  lcd.print("*******     ");
}
else if(distanceCm>=152 && distanceCm<=177 ){
  lcd.setCursor(0,2);  lcd.print("********     ");
}
else if(distanceCm>=178 && distanceCm<=202 ){
  lcd.setCursor(0,2);  lcd.print("*********     ");
}
else if(distanceCm>=203 && distanceCm<=227 ){
  lcd.setCursor(0,2);  lcd.print("**********     ");
}
else if(distanceCm>=228 && distanceCm<=252 ){
  lcd.setCursor(0,2);  lcd.print("***********      ");
}
else if(distanceCm>=253 && distanceCm<=277 ){
  lcd.setCursor(0,2);  lcd.print("************       ");
}
else if(distanceCm>=278 && distanceCm<=302 ){
  lcd.setCursor(0,2);  lcd.print("*************        ");
}
else if(distanceCm>=303 && distanceCm<=327 ){
  lcd.setCursor(0,2);  lcd.print("**************         ");
}
else if(distanceCm>=328 && distanceCm<=352 ){
  lcd.setCursor(0,2);  lcd.print("***************          ");
}
else if(distanceCm>=353 && distanceCm<=378 ){
  lcd.setCursor(0,2);  lcd.print("****************            ");
}
else if(distanceCm>=379 && distanceCm<=403 ){
  lcd.setCursor(0,2);  lcd.print("*****************              ");
}
else{lcd.setCursor(0,2);  lcd.print("*****************              ");
}

}