Hugo Plácido da Silva | Hugo completed a BS in Computer Science, and a MS in Electrical and Computers Engineering. Since 2004, Hugo is a researcher at the IT - Instituto de Telecomunicações, where he’s currently pursuing his PhD. In 2012, he was a visiting researcher at the Computational and NeuroEgineering Labority (CNEL) from the University of Florida. He is also one of the co-founders of PLUX – Wireless Biosignals, established in 2007 as an innovative technology-based company operating in the field of medical devices for healthcare and quality of life, where Hugo is currently a Board Member and Innovation Advisor.
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A follow-up article with a few pointers on how to build a more practical device and record and analyze the data is now available here: https://opensource.com/life/15/6/how-build-diy-activity-tracking-device
Figure 1 is really a pretty simple chart created by loading the stored data straight from the file and plotting it with the matplotlib library (http://matplotlib.org/gallery.html).
I'll try to put together a more comprehensive/useful codebase, and make it available to the community.