พอดีกำลังทำโปรเจคเกี่ยวกับ Arduino ครับ และผมไม่ค่อยมีพื้นฐานเลยในการเขียนภาษาซีเลยไม่รู้คำสั่งบางอย่าง อันนี้โค้ดครับ ผมติดตรงที่ได้คอมเม้นไว้ครับรบกวนผู้รู้ช่วยแนะนำทีครับ

[open_code]#include <Keypad.h>
#include <LiquidCrystal.h>

#define Password_Lenght 4

LiquidCrystal LCD(A0, A1, A2, A3, A4, A5);
char Data_one[Password_Lenght];  
char Data_two[Password_Lenght];

byte maxPasswordLength = 4;
byte currentPasswordLength = 0;
byte data_count_one = 0,data_count_two = 0, master_count = 0;
boolean Pass_is_good1 = false;
boolean Pass_is_good2 = false;
boolean Pass_is_good3 = false;
boolean Pass_is_good4 = false;
char customKey_one,customKey_two;


const byte ROWS = 4;
const byte COLS = 3;
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};

byte rowPins[ROWS] = {10, 9, 8, 7};
byte colPins[COLS] = {13, 12, 11};


Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
void setup()
{
  LCD.begin(16, 2);

}

void lock()
{
  
}

void unlock()
{
  
}

void loop()
{
      
if(customKey_one = keypad.getKey())

{    
      if(customKey_one != '#')
      {
                  
                      
                    
        if (customKey_one != '*')
        {
                  
                    
         //Get password
          
                      Data_one[data_count_one] = customKey_one;
                      LCD.setCursor(data_count_one,0);
                      LCD.print(Data_one[data_count_one]);
                      data_count_one++;
          
        }else
        
          {
         if (data_count_one == 4)
        
                  {
                    LCD.clear();
                    LCD.setCursor(0, 0);
                    LCD.print("unlock bike");
                    delay(500);
                    LCD.clear();
                    LCD.setCursor(0, 0);
                    LCD.print(Data_one);

                    // Transfer code from Data_one to UnLockCode
                    
                    // Compare LockCode & UnLock Code (if)
                    // Match (Unlock)- Send signal to hardware
                    // Not match (Ignore - Warning)
                    
                    
                    
                    data_count_one==0; //reset counter
                    
                  }else
                    {
                        LCD.clear();
                        LCD.setCursor(0, 0);        
                        LCD.print("num only");
                        delay(500);
                        LCD.clear();
                        LCD.setCursor(0, 0);
                        LCD.print(Data_one);
                    }        
          }
        }else
      
      { if (data_count_one == 4)
              
                  {
                    LCD.clear();
                    LCD.setCursor(0, 0);
                    LCD.print("lock bike");
                    delay(500);
                    LCD.clear();
                    LCD.setCursor(0, 0);
                    LCD.print(Data_one);

                    // Transfer code from Data_one to LockCode
                    // Send signal to hardware
                    
                    data_count_one==0; //reset counter

                  }else
                    {
                        LCD.clear();
                        LCD.setCursor(0, 0);        
                        LCD.print("Number only");
                        delay(500);
                        LCD.clear();
                        LCD.setCursor(0, 0);
                        LCD.print(Data_one);
                    }
      }
}//if customeKey_one
}//end loop [/close_code]