05/25/2026
The goal was to create a room occupancy sensor with an over limit alarm output. With the help of an Arduino Uno, some TOF sensors and a relay, we can bidirectionally count people going in or coming out of a room, and set an alarm straight to Ajax transmitter if the threshold is exceeded. Critical alerts from this sensor can be sent to the Ajax desktop app, mobile app, or simply activate the alarm siren. CMS monitoring is also optional.
A central power supply with battery backup will be installed to keep these babies up and running.
Once all long term testing has been complete, we’ll wrap it up in an aesthetically pleasing housing and put it to work!