Summary

In this project, we built an access control system using a fingerprint sensor with Arduino. We also built several cool applications based on it, including a way to get access to a secret piece of data using your fingerprint.

There are, of course, many things you can do in order to improve this project. For example, you can code a way for the secret message to disappear after a given amount of time; avoiding someone else getting access to it after you used the project. You could also connect the board to the web (for example, with an Ethernet shield) and use the fingerprint sensor to send a given tweet when you put your finger on it.

In the next chapter, we are going to use another piece of hardware to build an access control system: a GSM shield that will allow us to open a door just by sending an SMS!