I'm planning to make a simple waiting time estimate screen for a doctor's office.
They have chairs they want sensors on, so that they can estimate the approximately wait time.
The wait time is fixed and is 20 minutes for each chair.
They have 5 chairs that needs a sensor/detector.
If no customers is present, the wait time will be 0 - 5 minutes,
if someone is sitting on the first chair, the wait time will be 20 - 25 minutes.
If chair 1 and 2 is occupied, the wait time will be 40 - 45 minutes and it continues like this with 20 minutes interval for each chair.
My plan at the moment is following
- 1 raspberry pi on each chair (pre-programmed for each chair with a script that updates the estimated time on the screen)
- 1 sensor on each seat (IR Proximity Sensor, thermal sensor or something else that would be good and reliable. Preferably connected with USB)
- The sensor should be able to detect that the seat is occupied by detecting that someone is sitting there (in example a sensor in the gap between the seat and the backrest, that could be mounted on the wall behind the chair)
Do you have any advise for what type of sensors i should use or other ideas of how this can be solved?