Show HN: Howmanypeoplearearound – Use wifi to calculate number of people around

Re:Show HN: Howmanypeoplearearound – Use wifi to calculate n... by contingencies on Saturday May 13, 2017 @10:47PM (#14333983)

Bluetooth equivalent would be cool, then pairing bluetooth and wifi MACs based on temporal correlation. If one changes you can infer from the other. Over time you could split it to howmanylocalsaround verus howmanyvisitorsaround.

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Re:Show HN: Howmanypeoplearearound – Use wifi to calculate n... by sattoshi on Saturday May 13, 2017 @11:57PM (#14334145)

People don't walk around with bt for no reason though.

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Re:Show HN: Howmanypeoplearearound – Use wifi to calculate n... by pyromine on Sunday May 14, 2017 @12:49AM (#14334272)

A lot of people leave the bluetooth on but just not connected

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Re:Show HN: Howmanypeoplearearound – Use wifi to calculate n... by codefined on Sunday May 14, 2017 @06:02AM (#14334957)

Really? From what I've seen they turn it off as soon as they can to save battery life.

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Re:Show HN: Howmanypeoplearearound – Use wifi to calculate n... by rocqua on Sunday May 14, 2017 @06:25AM (#14335012)

I used to do that, but my new phone has better batteries, so that isn't an issue any more. Combine that with my bluetooth headphones, and it's more convenient to just keep BT on at all times.

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Re:Show HN: Howmanypeoplearearound – Use wifi to calculate n... by kopijahe on Sunday May 14, 2017 @06:17AM (#14334988)

There's many accessories that rely on bluetooth nowadays: smartwatch/smartband, headset (moreover with the newest trend of ridding the 3.5 mm jack), etc.

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Re:Show HN: Howmanypeoplearearound – Use wifi to calculate n... by oneeyedpigeon on Sunday May 14, 2017 @06:54AM (#14335081)

It's easy to forget. I probably leave my phone's wifi hotspot on accidentally about half the time too.

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Re:Show HN: Howmanypeoplearearound – Use wifi to calculate n... by remx on Sunday May 14, 2017 @10:23AM (#14335749)

A lot of people also forgo carrying a smartphone completely for privacy reasons

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Re:Show HN: Howmanypeoplearearound – Use wifi to calculate n... by doubleplusgood on Sunday May 14, 2017 @07:48AM (#14335228)

I never turn off BT on my phone, since I don't want to tinker around with it when I get into the car or turn on a wireless BT headset.

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