The Serial Monitor will tell whether the numerical-key inputted to the keypad is correct or not. To activate and deactivate the lock, the user must press * and then the secret key, followed by #.

An Arduino Uno provides the processing power and drives the serial monitor. A joystick and a Hitachi H48C accelerometer are mounted on a breadboard and wired to the Uno.

I like to visualize things, so I decided to prepare this simple tutorial to help you better understand how to visualize data using Arduino. This tutorial assumes that you have some basic electronics ...