I found with FSR that they werent very reliable under a memory foam mattress in determining who was in the bed or not. My young kids (6 and 8) and a 35lb dog would trigger it often. I ended up having to wear a watch and my wife too and she hates watches lol. I’m hoping this method is better at determining who is in the bed.
I’m a year too late here. But that’s indeed the case for a few different varieties of HX711 boards I ordered.
Some high-quality ones do have a ground plane with the ground of the board completely connected. Some even have a shield. However, I have not used those boards yet as my current solution was working fine.
I moved house over 2 years ago and could not continue this projects due to conflicts with the PAF.