When you are sitting in the room to concentrate on the work, you suddenly have received a friend's massage,” he had pressed the doorbell many times, but no one to open the door”. Have you ever met such a thing?
Today we can use Micro:bit and BOSON to make a mobile doorbell, you can carry it in the house or put it in the area you often stay.
Functions of the mobile doorbell:
1. Remote information transfer, to achieve the mobile doorbell
2. Sense the body, to achieve lighting in the dark
3. On the part of the outside, through the arrow, prompt to position of touching the doorbell. If touch, it will show "welcome".
4. When the signal is received, it will show “somebody” on the mobile part.