[Renaud Schleck] somehow got lucky enough to find a GPS wristwatch in the trash. It had a broken LCD screen so its wouldn’t be of much use on that next hiking trip, but he knew it still had potential. He used the GPS module and a few other parts to build this reverse geocache box.
Reverse geocache is a container that is locked, opening only in a pre-defined geographic location. We’ve seen plenty of these projects around here, like this one that talks, or this one which was given as a Christmas gift. They’re popular projects both because of the unique method of getting at the prize inside, and because it doesn’t take a whole lot of hardware to build one. Once [Renaud] had the GPS module he simply need a user interface, locking mechanism, and a microcontroller to pull it all together.
The interface uses a screen from an old cellphone and one push button. The latching system is a tiny geared motor salvaged from a Laptop optical drive. These, along with the GPS watch board are all monitored by the STM32 microcontroller which he programmed using OpenOCD and the Bus Pirate.
[via Reddit]
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I am the person he offered the box to, I can attest it worked great, and if your are nice, I’ll telle you what was inside !!
First of all we would like to thank the organisation of the Ghent Arduino Jam
Session and especially the main sponsor, Capgemini, which made
http://www.dqglobal.com
I’d like to know: has anyone attempted geolocation spoofing to brute-force any such devices? If so, how long does it take?
Brilliant! This would be the most AWESOME way to propose marriage. If/when I find the one, this will be how I do it.