O'Reilly logo

Building a Home Security System with Arduino by Jorge R. Castro

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Access control

The objective is simple: we just have to let people in who have a specific card with a specific serial number. If you want to use encrypted keys, you can change the ID of an encrypted message inside the card with a key known only to the creator of the card. When a successful identification occurs, a green flash lead us to report that someone has had authorized access to the system. In addition, the user is notified of the access through a pleasant sound, for example, will invite you to push the door to open it.

Otherwise, an alarm is sounded repeatedly, alerting us of the offense and activating an alert command center (a red flash that is repeated and consistent, which captures the attention of the watchman.)

Feel free to add more ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required