Microbit monitor adapter for office Busy-Free

I created this little project as a way to avoid undesired interruptions at work. With the A button you can change the your state between "free" and "busy". You can also turn off the LED matrix display. With the B button you active a 20 minutes Pomodoro. The Matrix columns will fill the screen to show the progress of your pomodoro.

You can also connect your smartphone via bluetooth. If someone calls you the Microbit with show a message saying that you are in a call. If there's an emergency and people doesn't know where you are, they can press the A and B buttons and the same time, your smartphone will beep and vibrate in your pocket!