Developing Beacons with Bluetooth low energy (BLE) …
The Bluetooth SIG announced Bluetooth low energy features with version 4.0 of the Bluetooth specification in 2009. It was later re-branded as Bluetooth Smart, and has just been rebranded again in 2016 (see footnote 1 above). Consequently the terms Bluetooth Smart, Bluetooth Low Energy, BLE, and now Bluetooth low energy