light barrier

using a scale is retarded

do u even ee

or you could use a piezoelectric element that detects the impact of something within your mailbox

endless possibilities

and a scale is the most stoopid of them all

holy shit the photoelectric sensor is pricy

>pricy

wat

http://uk.rs-online.com/web/p/photoelectric-sensors/4443619/

119 pounds

lol

what the fuck are you searching

you can build a shitty one literally out of an IR LED and a phototransistor/photoresistor

ok

what kind of mailbox do you have?

uhh

idk

like form factor

a box with a slit on top that you tilt to shove in the newspaper

or american-styled that you open in the front that has one of those gay ass flags that the postman is supposed to put up

its like

its a box

with two

umm

pieces

on top

that you have to open

dude

https://upload.wikimedia.org/wikipedia/commons/e/e0/Quevaal_heyheydecay.net_postkasser.jpg

like this

you can make a sensor for that with fucking aluminium foil

learn2ee

I'm not going to break it down for you, but basically

put aluminium foil on lid and on rim

break it down pls im retarded

when it's opened circuit breaks

ah

yes

-> triggers something

then you can go from there with wifi - though wifi is stoopid for that usecase