Radio Door Alarm

The Project

This project uses two microbits. One is attached to my door with a magnet nearby. When the magnet is close to the microbit, it sends a radio message saying “The door is closed” to the second microbit, which I carry with me. If the magnet moves away (when the door opens), it sends a message saying “The door is open” and also sounds an alarm. The project works using the "compass sensor" to detect the magnetic field and the "radio feature" to send messages between microbits. I was inspired to make this because I wanted a simple way to know when someone opens my door—like a basic security system. One of the biggest challenges was getting the magnet detection and radio communication to work together accurately, but I learned a lot while figuring it out! Thank you for checking out my project!

View this project on YouTube