I am building a quadcopter project. I want to use OpenCV and C++ language 
to detect hand gestures to control the quad. 
The idea is to detect the gesture then write commands (to move forward, 
backwards, etc.) to a file on harddisk and then have BBB read commands from 
that file over WiFi. 
I know how to write to a file using C++, but don't know how to go beyond 
that. Please help.

Also, if there's some better way to acheive the gesture control, please 
recommend. Thank you! :)

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