mini project arduino



code


#include <Password.h>
#include <Keypad.h> 



Password password = Password( "0000" ); //password to unlock, can be changed

const byte ROWS = 4; // Four rows
const byte COLS = 3; // columns
// Define the Keymap
char keys[ROWS][COLS] = {
{'1','2','3'},
{'4','5','6'},
{'7','8','9'},
{'*','0','#'}
};
// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
byte rowPins[ROWS] = {8, 7, 6, 5 };// Connect keypad COL0, COL1 and COL2 to these Arduino pins.
byte colPins[COLS] = { 4, 3, 2 };


// Create the Keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){
  pinMode(10, OUTPUT); 
  pinMode(11, OUTPUT);  //green light
  pinMode(12, OUTPUT);  //red light
  
  keypad.addEventListener(keypadEvent); //add an event listener for this keypad
  }

void loop(){
  keypad.getKey();

  }
  //take care of some special events
  void keypadEvent(KeypadEvent eKey){
  switch (keypad.getState()){
  case PRESSED:
  switch (eKey){
    case '*': checkPassword(); delay(1); break;
    
    case '#': password.reset(); delay(1); break;
    
     default: password.append(eKey); delay(1);
}
}
}
void checkPassword(){ 
if (password.evaluate()){  //if password is right open  
        digitalWrite(11, HIGH);//turn on
    delay(5000); //wait 5 seconds
    digitalWrite(11, LOW);// turn off 
        digitalWrite(10, HIGH);//turn on
    delay(500); //wait 5 seconds
    digitalWrite(10, LOW);// turn off   
}else{
    digitalWrite(12, HIGH); //turn on
    delay(500); //wait 5 seconds
    digitalWrite(12, LOW);//turn off
    
}
}

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