I have a mailbox that has an open slot that I would like to add a sensor to to detect new mail. As there is no flap that is opened when mail is posted, I don’t think I can use something like a reed sensor. I thought about using something kind of pressure sensor on the floor inside the mailbox, just sometimes large envelopes (or junk mail) is shoved in and doesn’t nesessarily rest on the inside.
Appreciate any ideas people might have for something that would work reliably.
