14 comments

• Comment Link Sunday, 25 November 2018 19:27 posted by mugur

  Hello Admin. Can you tell us how to write the new(last) password in EEPROM? i have tried with EEPROM.h and PUT/GET so i can retrieve the last stored pass after a power outage; but i cannot succeed for the life of me. THANK YOU !!!
• Comment Link Monday, 09 April 2018 21:03 posted by Fethi

  J'ai besoin d'un programmation arduino
• Comment Link Monday, 08 January 2018 18:28 posted by Géza

  szopjatok le ti büdös buzik ha nem tudjátok egyszerübben leirni
• Comment Link Saturday, 24 June 2017 13:11 posted by admin

  The change password function is to change an old password to a new password. The new password is a String type, you must convert it to character array before you can call the password.set function.
• Comment Link Wednesday, 21 June 2017 16:33 posted by Javid_HPF

  And learn another way to ask old passcode, How can we do this with using an if condition?
• Comment Link Wednesday, 21 June 2017 16:23 posted by Javid_HPF

  Hi, please explain more about the change password function!
• Comment Link Thursday, 25 May 2017 12:21 posted by admin

  Did you solved the problem?
• Comment Link Monday, 15 May 2017 16:13 posted by Siam Al Huq

  //**heres my code n some codes i have tried but couldn't change the password newPasswordString remains blank the way i have tried please let me know how can i solve this.TIA. **//
  #include
  #include
  
  String newPasswordString;//hold the new password
  char newPassword[6]; //charater string of newPasswordString
  
  //initialize password to 1234
  //you can use password.set(newPassword) to overwrite it
  Password password = Password( "1234" );
  
  byte maxPasswordLength = 6;
  byte currentPasswordLength = 0;
  const byte ROWS = 4; // Four rows
  const byte COLS = 4; // Four columns
  
  //Define the keymap
  char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
  };
  
  //// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
  byte rowPins[ROWS] = {6,7,8,9}; //connect to row pinouts
  
  // Connect keypad COL0, COL1, COL2 and COL3 to these Arduino pins.
  byte colPins[COLS] = {2,3,4,5}; //connect to column pinouts
  
  // Create the Keypad
  Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
  
  void setup(){
  Serial.begin(9600);
  Serial.println("Arduino Keypad Secuirity Lock");
  Serial.println("Enter Your Password");
  Serial.println("To Unlock");
  delay(1000);
  }
  
  void loop(){
  char key = keypad.getKey();
  if (key != NO_KEY){
  delay(60);
  switch (key){
  case 'A': Serial.print("Entered");break;
  case 'B': break;
  case 'C': checkPassword(); break;
  case 'D': changePassword( key ); break;
  case '#': break;
  case '*': resetPassword(); break;
  default: processNumberKey(key);
  }
  }
  }
  
  void processNumberKey(char key) {
  Serial.print(key);
  currentPasswordLength++;
  password.append(key);
  if (currentPasswordLength == maxPasswordLength) {
  checkPassword();
  }
  }
  
  void checkPassword() {
  if (password.evaluate()){
  Serial.println(" Password Match.");
  Serial.println(" Access Granted.");
  } else {
  Serial.println(" Wrong passwowrd!");
  Serial.println(" Please Try Again");
  }
  resetPassword();
  }
  
  void resetPassword() {
  password.reset();
  currentPasswordLength = 0;
  }
  
  void changePassword( char key ) {
  
  //readString( );
  byte currentPasswordLength = 0;
  Serial.print("Enter password: ");
  int i =0;
  while(true)
  {
  Serial.print(key);
  
  currentPasswordLength++;
  password.append(key);
  newPasswordString = keypad.getKey();
  if(i==5){
  break;
  }
  i++;
  }
  
  //Print some feedback.
  
  //for(int i=0 ; i
• Comment Link Friday, 07 April 2017 08:15 posted by Tarciso Ferreira

  Tanks, very very nice.
• Comment Link Tuesday, 07 February 2017 13:25 posted by Bong

  i copied the library into libraries, error found, invalid library foundC:\Users\Bonggicious\Documents\Arduino\libraries\Password
• Comment Link Monday, 25 April 2016 11:10 posted by admin

  I have an electronic code lock project which is written in Chinese. On the top left of the webpage, there is a combox use to translate the article to other languages.
  
  http://ediy.com.my/2012-10-21-15-15-03/2013-04-14-05-06-50/item/79-arduino
• Comment Link Monday, 25 April 2016 06:33 posted by Shiva

  Good tutorial, just one doubt that i have,
  How to ask user to enter old password, verify and change password inside changePassword() function.??
• Comment Link Sunday, 06 March 2016 13:14 posted by admin

  1. use your keyboard to change the password and store it in EEPROM
  2. Read the password from EEPROM on startup
  3. Use password.set(EEPROM_password) to initialize your password
• Comment Link Saturday, 05 March 2016 23:25 posted by don sim

  How do you reset pass to another # without scanning? Is there a way to set it by the keyboard ie user defined?