Nuub here..
Thinking about building this in my mailbox..
AND if possible set a green light diode to start light when box is opened and stop when its opened again.
That way i would see when i come home if someone has opened the mailbox or not.. Sure push notifications work aswell but it would be a nice touch for the wifey
I've been tinkering with 3d printing for about a year now and never had any experience before.
Tried most softwares out there that are free and seem to allways comeback to fusion 360.
For slicing I like slic3r PE in the free tier, even tho its interface looks dated it has some very nice features and handles material/printing profiles really great.
But if u want an all in one package it's simplify 3d. Even tho you don't get the same control as slic3r and it doesn't handle material profiles as good.
It has a clean interface, great gcode preview and a few killer features like custom supports (yes there are other slickers with this aswell) and multi processing that lets you switch profiles anywhere in the print or model.
Yes it's a big price now days for a piece of software. But if you are going to use it alot it is well worth it's price.
Thanks alot for all the help with My newbie arduino questions. Ill try the wait statement later
You lost me at bluetooth beacon? 
Me personally is using the app but wifey and kids ain't really as interested as i am 
So therefore I would need a indicator of some sorts around the mailbox that is about 30 meters from the house in the road up to the house.
Maybe a solar led light or similar to light up? Or a flag on a servo?
Will start with building the switch and figure out the indicator later.
Yes i do.
This is like going back to school... but fun!