You can find all the necessary code here. Popular applications have included fitness trackers (Fitbit, Nike+, etc) and in-store notification beacons (see Apple's iBeacon) but now BLE is starting to make its way into all kinds of consumer devices. It is only the second time I've tried to put together an Android app, so improvements and collaboration are very welcome! You might be thinking "Bluetooth?!? But that's been around forever, what's the big deal?" The new standard attempts to address some of the short-comings of Bluetooth by simplifying the pairing process and reducing power drain, aiming to replace an array of proprietary radios and protocols with something more standardized. For my project I'm using an inexpensive module based upon TI's CC 2540 chip called the HM-10. This is my proof-of-concept attempt at working with Bluetooth LE, Android and Arduino. I've seen a lot of Kickstarter projects featuring the new Bluetooth 4.0 Low Energy standard and a number of Bluetooth LE (BLE) enabled Arduino clones coming to market, but many of these projects still seem to be somewhere in the production process and I couldn't find a lot of practical information about how to get BLE connected with Android.
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