Exploring Occupancy Detection Options

A project log for Automated Circadian Bathroom Light

A bathroom light that automatically changes from bright and cool white in the morning to warm and cozy at night.

anaAna 04/22/2019 at 18:010 Comments

One feature we would like to have on our light is occupancy detection, but a regular motion sensor will not suffice because of a few problems:

Obviously a Bluetooth device in the light to detect mobile devices are not optimal because you don't always bring your phone to the bathroom and we don't want to inconvenience the user.

After some research, we have come to the conclusion that using Wi-Fi as a radar is the best solution. By transmitting frequencies and analyzing them when they return to the device, we can see if there is continuous change and detect if something in the room is moving.