Physical computing : Combination Lock

gistfile1.txt

/*
sketch to open a digital lock
*/
int attemptCount = 0;
int lastButtonState3 = 0;
int lastButtonState4 = 0;
int lastButtonState5 = 0;
int lastButtonState6 = 0;
int buttonState3;
int buttonState4;
int buttonState5;
int buttonState6;
int warningCount;
int aButCount = 0;
int bButCount = 0;
int cButCount = 0;
void setup() {
    pinMode(3, INPUT);
    pinMode(4, INPUT);
    pinMode(5, INPUT);
    pinMode(6, INPUT);
    pinMode(13,OUTPUT);
    pinMode(12,OUTPUT);
    Serial.begin(9600);
}

void loop() {
  if (attemptCount <=2) 
  {
    
  
      buttonState6 = digitalRead(6);
      if (buttonState6 == lastButtonState6) 
      {
        buttonState3 = digitalRead(3);
        if (buttonState3 != lastButtonState3) 
        {
          if (buttonState3 == HIGH) 
          {
            aButCount ++;
          }
          Serial.println("A was pressed these number of times :");
          Serial.println(aButCount);
          lastButtonState3 = buttonState3;
        }
        delay(50);
    
        buttonState4 = digitalRead(4);
        if (buttonState4 != lastButtonState4) 
        {
          if (buttonState4 == HIGH) 
          {
            bButCount ++;
          }
          Serial.println("B was pressed these number of times :");
          Serial.println(bButCount);
          lastButtonState4 = buttonState4;
        }
        delay(50);
    
        buttonState5 = digitalRead(5);
        if (buttonState5 != lastButtonState5) 
        {
          if (buttonState5 == HIGH)
          {
            cButCount ++;
          }
          Serial.println("C was pressed these number of times :");
          Serial.println(cButCount);
          lastButtonState5 = buttonState5;
        }
    delay(50);
    
  } 
  else 
    { 
      int code = (aButCount * 100) + (bButCount * 10) + cButCount;
      if (code == 215) 
      {
          buttonState6 = 0;
          aButCount = 0;
          bButCount = 0;
          cButCount = 0;
          attemptCount ++;
          Serial.println("Success !!!");
          digitalWrite(13,HIGH);  // lights up green LED
          delay(5000);
          digitalWrite(13,LOW);
          delay(1000);
      
      }
      else 
      {
          Serial.println("Failed Attempt !!!");
          attemptCount ++;
          buttonState6 = 0;
          aButCount = 0;
          bButCount = 0;
          cButCount = 0;
          digitalWrite(12,HIGH);    // lights up red LED
          delay(5000);
          digitalWrite(12,LOW);    
          delay(1000);
      }
    
  
    }
}
else 
  {
      for ( warningCount = 0; warningCount<=20; warningCount ++) 
      {
        digitalWrite(12 , HIGH);
        delay(300);
        digitalWrite(12 , LOW);
        delay(300);
      }
  }
}