Due to the SARS-CoV-2 pandemie, we had to implement a hygiene plan before re-opening our boulder gym "Kletterthalia".

One part of this plan was to track the number of people in the room and display a chart on our website to let people know if it is worth to take a trip to the gym or not because it is full.

To aid the teller, I build a laser sensor barrier which tracks "objects" entering and leaving the room. Because these numbers can never be 100% accurate, we implemented a function to adjust the number in the tellers management software.

The laser sensor barrier was built using:

The code for my "PresencePi" alongside with some examples can be found on GitHub