LoRa Mailbox Sender

SENDER MODULE
For receiver module: https://www.thingiverse.com/thing:3593785

Everyday, when I get home for lunch, I stop at the mailbox for nothing more often than not. The mailman didn't pass yet and there's no mail, then I have to stop again at the end of the day. If the mailman passed and I don't have mail that day, I still don't know and I need to stop again at the end of the day. If I received mail and my wife already picked it up, I still stop for nothing at lunch.

So I had the idea to create a device able to detect it. The way it works is that the sender detects if the main front panel is opened or only my box door. Then it sends a LoRa signal to my receiver in my house about 300' from the community mailbox.

If you need to adapt this for you, the STEP file is available in the "Thing File"