2024-06-13 19:21:56 +00:00
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## System
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- Use beacons mounted on stationary objects within a room to allow user
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supplied devices to triangulate their rough position inside the room
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- The users may share their location via various means.
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- XMPP
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- complex
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- relies on external infrastructure eventually
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- robust against network topology traversals (NAT/Firewall)
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- Multicast
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- simple
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- not robust when traversing NATs
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- Useful for a conference hall or the like, where an area is large
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enough to prevent finding ones way or friends easily.
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testing guest captcha
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## Hardware
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### SOCs
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- [Nordic](http://www.mouser.com/ProductDetail/Nordic-Semiconductor/nRF51822-QFAB-R7/?qs=sGAEpiMZZMvQqVCO1QUke9rOCiF3q8UDR59ukwBL9d8%3d)
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- [TI](http://www.mouser.com/ProductDetail/Texas-Instruments/CC2540F128RHAR/?qs=sGAEpiMZZMuReUCzg6bfTFMX9eNsg5flb%2fyNLpDtSPE%3d)
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### Front End/BT modules
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- just as expensive as SOCs
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## Software
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### Phone App
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#### Android
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#### iThing
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### Firmware
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- bit-bang BTLE library
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[code](https://dmitry.gr/index.php?r=05.Projects&proj=11.%20Bluetooth%20LE%20fakery)
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for reference
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#### Beacon
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- Similar use cases
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- Beacon tagging - tags beacon to allow device to find the tagged item
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- [iBeacon](http://en.wikipedia.org/wiki/IBeacon) - proprietary
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implementation
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- Use [Proximity
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Sensing](http://en.wikipedia.org/wiki/Bluetooth_low_energy#Proximity_sensing)
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Profile (PXP/FMP) to let user devices know where and roughly how far
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2024-06-13 01:48:44 +00:00
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they are from the beacons.
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