Question to those who know the landscape of little microcontrollers well: if I wanted to build a small pet tracking chip (gps and cell, probably) that would work way out in the boonies (like middle-of-nowhere-Wyoming), where should I look? Am I right to be thinking gps+cell, or is this something where I could get away with just GPS (and somehow track where that GPS is pinging from)?<p>And would something like a tumble generator provide enough power?