jago2:
I came here to ask about the technical side.
we can help you with your product selections and guide you on your programming needs.
it was pointed out that there are a number of devices on the market to help track packages. if none of them fit your needs, or you just want to make your own, here is a simple starting list of options.
main boards :
pro-mini
Nano
wemos D-1
pros's smaller in sizes, lots of pins
sensors ;
vibrations
shocks
temperature
gyroscope for angles
atmospheric pressure
humidity
real time clock
GPS
there can be lots more, some have good points
the GPS may not work for a large portion of the journey, but may work inside of open warehouses revealing where it traveled. information could be valuable.
list what you think you would want to have and let us know what your questions are.