Bluetooth Low Energy (BLE), formerly known as Bluetooth Smart, is a wireless technology for the contactless transmission of data between devices over a short distance of around 10 meters and was published in 2009 as an optional part of Bluetooth 4.0. Compared to classic Bluetooth, however, BLE has the advantage of lower power consumption and lower costs. Bluetooth Low Energy is not backwards compatible. With the Bluetooth specification 4.2, IPv6 was integrated into the smart protocol stack in order to better position the technology for the Internet of Things (IoT).

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