How to make a button under the floor?

Question

Electronics

I have an idea for a reality quest. It is necessary to organize the buttons under the floor. Which would close the contacts when pressed with a foot.

Answer 1

Buy thinner Chinese bathroom scales, open them up, install load cells from them together with the plate, tile on their plate, calibrate to zero, it will still be possible to program a different reaction for different pressings.

Answer 2

Maybe someone has experience? plan to lay tiles on the floor. with RFID cool, but not suitable.
I was thinking of sticking the tile on a rigid plate (so as not to break the ceramics), but now I’m tinkering under the plate.