Wondering what’s the best hardware stack to build a system where a bunch of devices (say boxes) when they get loaded onto a car can detect a base station inside a car and emit their ID to the base station. The base station (could be connected to a phone/app) then submits all of their IDs that say they were present at that location and have been picked up.

I guess I’m trying to defer the GPS location onto the phone.

Would this solution be better, in terms of cost? As opposed to just a GPS tracker for each device that just pings its location to a central station?

I don’t need indoor accuracy (I guess no need for BLE/beacons from what I’m reading). But I do need where in the world location those boxes left the warehouse kind of data.

I’m a programmer, and would like to try making a POC for this? Any suggesting/advice?