Indoor gps

References

• http://en.wikipedia.org/wiki/IBeacon
• http://www.infoworld.com/article/2608498/mobile-apps/what-you-need-to-know-about-using-bluetooth-beacons.html
• https://play.google.com/store/apps/developer?id=Radius+Networks,+Inc.&hl=en

There is an android app that will display all visible beacons. For some android devices, it allows transmitting beacon info, but not for my Nexus 5. Only Nexus 6 and Nexus 9 appear to have this enabled.

• buy some Bluetooth 4.0 dongles from Adafruit