/*
  Forum: https://forum.arduino.cc/t/im-having-uploading-my-code-to-my-board-this-error-message-show-up/1184392
  Wokwi: https://wokwi.com/projects/380195072459624449

*/

#include <LiquidCrystal.h>
const int rs = 8, en = 2, DB4 = 4, DB5 = 5, DB6 = 6, DB7 = 7;
LiquidCrystal lcd(rs, en, DB4, DB5, DB6, DB7);

byte happyface[] = {
  B00000,
  B00000,
  B00000,
  B01010,
  B00000,
  B10001,
  B01110,
  B00000,
};
byte sadface[] = {
  B00000,
  B00000,
  B00000,
  B01010,
  B00000,
  B01110,
  B10001,
  B00000,
};
byte ordinary[] = {
  B00000,
  B00000,
  B01010,
  B00000,
  B11111,
  B00000,
  B00000,
  B00000,
};
byte die[] = {
  B00000,
  B10101,
  B01010,
  B10101,
  B00000,
  B01110,
  B01010,
  B01110,
};

constexpr byte trig = 9;
constexpr byte echo = 10;
long duration, distance;
char customChar = 0;
char previousCustomChar = 127;

void setup()
{
  lcd.begin(16, 2);
  lcd.createChar(1, happyface);
  lcd.createChar(3, sadface);
  lcd.createChar(2, ordinary);
  lcd.createChar(4, die);
  lcd.clear();
  lcd.print("Custom Character");

  Serial.begin(9600);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
}

void loop()
{
  digitalWrite(trig, LOW);
  delayMicroseconds(10);
  digitalWrite(trig, HIGH);
  duration = pulseIn (echo, HIGH);
  distance = duration / 57.8;
  Serial.println(distance);
  switch (distance) {
    case 0 ... 25:
      customChar = 1;
      break;
    case 26 ... 100:
      customChar = 2;
      break;
    case 101 ... 150:
      customChar = 3;
      break;
    case 151 ... 250:
      customChar = 4;
      break;
    default:
      customChar = '?';  // Display "?"" if distance > 250 
      break;
  }
  if (customChar != previousCustomChar) {
    lcd.setCursor(0, 1);
    lcd.write(customChar);
    previousCustomChar = customChar;
  }
}