Getting GPSd to work with Python and Threading

I bought a few Raspberry Pis with great ambition of doing something awesome with them. Beyond showing my co-workers how cool I was for having them, the Raspberry Pis  pretty much just sat on my desk collecting dust. A month or two after getting them I realized that the Pis would fit nicely into our RallyRecorder project as a GPS tracker/recorder. Previously we had this running on a netbook with a USB GPS receiver using GPSd, a combination of command-line PHP and shell scripts, and MySQL. With the reduced specs on the Raspberry Pi (700 MHz, 256 MB RAM), I wanted to go with something with a little less overhead. Wisely or not, I chose Python and SQLite. Not having worked with either of the before, it should also provide a nice challenge.

After I started looking around the web for info about getting GPSd working with Python, I quickly found that any information was out of date, out of version, or just didn’t compile. It didn’t help that I started learning Python last night. Hey, go big or go home, right?

First we’ll quickly go through how to get all of the software prereqs. This is written for the Raspberry Pi but should work on most Linux distros too. Continue reading

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