![]() ![]() then we have printed information to the LCD. ![]() Let’s discuss the setup part of the program. #include Ĭonst byte numRows = 4 //number of rows on the keypadĬonst byte numCols = 4 //number of columns on the keypadĬhar keypressed //Where the keys are stored it changes very oftenĬhar code = //Then uncomment this for loop and reupload the code (It's done only once) Just compile it and finally upload it to the ATmega328 microcontroller. You can easily copy and paste the code using the Arduino IDE. The code is provided for a Password Security Lock System Using Arduino & Keypad project. But, if it is correct then it will change your current password. Here, the Arduino will compare the code, if it is incorrect then again it will get back to standby mode. and if it is correct it will ask the user to enter the new password and confirm the password by retyping it. Now, if the entered code is incorrect then it will get back to standby mode. Similarly, in Arduino Password Security Lock System, if the user press “ #” it will ask for the code.
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