Actually security is not a huge concern at this point (will be looking at 
security frameworks like passport.js shortly).  At this stage I'm just 
writing a application that controls GPIO on the BBB based on JSON data that 
will eventually come from a cloud service.  I am interested in the 
mechanism beagleboard.org uses to communicate to the BBB to create the 
necessary device tree overlays and /sys/class/gpio files from user space so 
I can do the same on my system.  I have done some quick searching and it 
seems the common answer is to run as root, change permissions/ ownership, 
but I'd prefer to avoid that route if possible (and there clearly is a 
solution that exists in the case of bb.org).

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