So for this project I am doing I need to be able to tell if a person is walking around or at least moving significantly so that I can deactivate the sensors that I am using. I am ok if the person is like sitting down and just fidgeting, but I don't want any significant movement like walking. The arduino or whatever module I will be using will be around there ankle. Is there a way to use the embedded accelerometer to detect this or can I use some other module with my nano to detect this?
The accelerometer will work for that, but you will need to collect data in a stream, and analyze that to determine "significant movement".
That analysis is much easier said than done, and depends entirely on how the person moves. Look for tutorials on how to access the accelerometer, print out the acceleration values for various movement patterns, and you will see what I mean.
Note: the accelerometer measures the acceleration due to gravity, in addition to acceleration due to other forces. So you always have a large background value to remove.
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