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Findphone: Locate a nearby Bluetooth device by signal strength

https://github.com/ben-z/findphone

13•helsinkiandrew•5d ago

Comments

HelloUsername•55m ago

Post inspired by "Lost my phone at the office. Claude suggested tracking Bluetooth signal strength" 07.aug.2026 https://news.ycombinator.com/item?id=49215786 215 comments ?

ruskyhacker•48m ago

I thought unless an android or iPhone is beaconing, it only broadcasts ble on device wake?

Maybe I'm misremembering, but for example my esphome proxies in HA will show nothing for ages at night while my phone isn't being interacted with.

If the phone is lost, it's probably not super awake lol

ck2•47m ago

Now turn it into a pervert-glasses detector and tracker

Make your phone alert when one walks into a room within several meters

glenjamin•40m ago

Weirdly Apple seems to have something like this built-in for finding an apple TV remote - but the same flow doesn't appear to be launchable for any other device

mschuster91•34m ago

It works for newer AirTags as well, this isn't BLE based but Ultra Wideband.

That's an entirely different technology, and if you look at it from an RF lens, a highly impressive one.

stuaxo•30m ago

20 years ago I meant to write something like this, but so friends could find each other nearby in places like clubs.

bouk•23m ago

Bluetooth now has something that does this more accurately on a protocol level: https://www.bluetooth.com/learn-about-bluetooth/feature-enha...

ranger_danger•19m ago

Seems to be macOS only.

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Findphone: Locate a nearby Bluetooth device by signal strength

https://github.com/ben-z/findphone

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