Has anyone ever used something like Raspberry Pi or Arduino combined with some kind of sensor to detect if a package is opened? It looks like you can get cellular modules for both (so you could send an email if the sensor goes off). Would it be possible to use a light sensor to detect if a package is opened and if so to send a message over cellular? It might be complex to setup but I don't think it would be expensive.
EDIT: in case it wasn't obvious I'm not talking about for personal amounts of drugs I'm talking about vendors importing large amounts of drugs into countries with strict customs.
Okay, so you use something to message you. You need service, so that means you need to pay for it somewhere. They could track it to where it was purchased and hope you failed on opsec and catch the person on film buying it. You'd have to make sure it's completely tight on that part
using SMS or app? if it's SMS, which number are you going to send it to? Burner phone? Then you gotta dump the phone and hope you had tight opsec buying the phone as stated above. If it's a dumb phone, they'd be able to find your general location to the nearest cell tower using the pings.
If it's a messaging app, you'd burn that receiving account too cause then they'd have that logged.
$20 for sim card to send message?
$40+ for Rpi + kits
$50 for burner phone + service for burner phone?
at the very least $100.