Now that I have a little experience, I've formed an opinion

> Advice sought:
> 1. Would it be helpful to have a timestamp in the devices record to
> give the time the device was last seen (for some value of "seen")?

Yes; this would be a good feature.

> 2. When should a device disappear from the /net/bt/devices list?

it would be good if this was settable. i think the value depends on the
application and user behavior. at a starbucks they might hang around,
but along a walkway it might be the length of time a person walks 30'.


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