I would like to track human presence (or could also be sound). I will place these sensors inside my room and should be able to track these events outside of my room.
The door of my room is in-front of another door. I want to track if a person enters or exits that door (through sound or whatever). The catch is I want to do this from inside. The distance between the doors is just 1 meter. And the sound of the both doors can be heard from both sides when they are opened.