Hardware

TODO: Fill this out with a tutorial

Parts list

RFM95 w/ breakout (alternatively this)
GPS (or this)
microSD breakout
DC in + USB-a power regulator (or maybe this)
microSD Card - any card that's 1GiB+ will do.
Arduino Uno
Breadboard
Jumper cables (e.g. a, b, and c)
Battery - Size currently unknown - I'll need to run some tests to see how much power it uses to figure out the right battery size.
Project box - if we can't 3D print one
TPL-5111 - also available from Pimoroni