What about a smart home? Automatic door opening could be a nice feature. Handicapped people could save the key. The key could be the Bluetooth Low Energy beacon in your pocket. The key is maybe an app on your phone. I have seen keys on BLE that work once a time or give entry once a time in a specific time frame only. It is amazing what simple Bluetooth Low Energy can do for you.
And those who want to listen to me about BLE and opportunities are welcome to stay on 5th February at the IoT Meetup in Munich. You will learn about BLE, you can touch and play with inexpensive BLE beacons, and on top you have a chance to win such BLE beacons during the event.
If you can’t make it and run an own IoT Meetup group or Google User group – then do not hesitate to email me at harald.naumann (at) gsm-modem.de
More Bluetooth Low Energy applications here