พยายามแล้วค่ะ กดอัพโหลดแต่จอก็ไม่ขึ้นตัวอักษรอะไรเลย
อันนี้คือโค้ดที่เขียน
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define btnRESET  0
#define btnONE    1
#define btnFIVE   2
#define btnTEN    3

LiquidCrystal_I2C lcd(0x27,16,4); // set the LCD address to 0x27 for a 16 chars and 2 line display

unsigned int coinONE = 0;
unsigned int coinFIVE = 0;
unsigned int coinTEN = 0;

unsigned int previouscoinONE = 0;
unsigned int previouscoinFIVE = 0;
unsigned int previouscoinTEN =0;

unsigned int coinSUM = 0;

boolean stateONE = 0;
boolean stateFIVE = 0;
boolean stateTEN =0;

void setup()
{
  attachInterrupt(0, FIVE, FALLING);      // #define btnFIVE  2
  attachInterrupt(1, TEN, FALLING);       // #define btnTEN   3

  pinMode(btnRESET, INPUT);
  pinMode(btnONE, INPUT);
  pinMode(btnFIVE, INPUT);
  pinMode(btnTEN, INPUT);

  pinMode(13, OUTPUT);
  
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print(" Count Coin ");
  lcd.setCursor(0, 1);
  lcd.print("    2      ");
  lcd.setCursor(0, 2);
  lcd.print("   System   ");
  lcd.setCursor(0, 3);
  lcd.print("            ");
  delay(1500);

  Show();
}

void loop()
{

  if((digitalRead(btnONE) == LOW)&&stateONE == 0))
  {
    stateONE = 1;
    delay(500);
    if((stateFIVE == 0)&&stateTEN == 0))
    {
      coinONE++;
    }
    
  }



  if((coinONE   != previouscoinONE)||(coinFIVE    != previouscoinFIVE)||(coinTEN    != previouscoinTEN))
  {
    Show();
    previouscoinONE = coinONE;
    previouscoinFIVE = coinFIVE;
    previouscoinTEN = coinTEN;
  
  }
}
  

void Show()
{
  coinSUM = ((coinONE*1)+(coinFIVE*5)+(coinTEN*10));

  lcd.setCursor(0, 0);
  lcd.print(" 1 THB = ")
  ;if(coinONE < 10)   {lcd.print("000"); }
  else if(coinONE < 100)   {lcd.print("00"); }
  else if(coinONE < 1000)    {lcd.print("0"); }
  lcd.print(coinONE);

  lcd.setCursor(0, 1);
  lcd.print(" 5 THB = ");
  if(coinFIVE < 10)   {lcd.print("000"); }
  else if(coinFIVE < 100)   {lcd.print("00"); }
  else if(coinFIVE < 1000)    {lcd.print("0"); }
  lcd.print(coinFIVE);

  lcd.setCursor(0, 2);
  lcd.print(" 10 THB = ")
  ;if(coinTEN < 10)   {lcd.print("000"); }
  else if(coinTEN < 100)   {lcd.print("00"); }
  else if(coinTEN < 1000)    {lcd.print("0"); }
  lcd.print(coinTEN);

  lcd.setCursor(0, 3);
  lcd.print("     SUM     ")
  ;if(coinSUM  <  10)  {lcd.print("00000" );}
  else if(coinSUM < 100)  {lcd.print("0000"); }
  else if(coinSUM < 1000 )  {lcd.print("000"); }
  else if(coinSUM < 10000 )  {lcd.print("00"); }
  else if(coinSUM < 100000)   {lcd.print("0"); }
  lcd.print(coinSUM);

  lcd.setCursor(14, 0); lcd.print("Coin   ");
  lcd.setCursor(14, 1); lcd.print("Coin   ");
  lcd.setCursor(14, 2); lcd.print("Coin   ");
  lcd.setCursor(16, 3); lcd.print("B-.    ");
  stateONE = 0;
  stateFIVE = 0;
  stateTEN = 0;
  
}

void FIVE()
{
  stateFIVE = 1;
  if(stateONE == 0)
  {
    coinONE++;
  }
  if(stateONE == 1)
  {
    coinFIVE++;
  }
}

void TEN()
{
  stateTEN = 1;
  if((stateONE == 1)&&stateFIVE == 1))
  {
    coinTEN++;
    coinFIVE--;
  }
}