It includes classic bluetooth, bluetooth high speed and bluetooth low energy protocols. Bluetooth high speed is based on wi-fi, and classic bluetooth consists of legacy bluetooth protocols. Bluetooth low energy, previously known as http://copper-wire-stripper.com/misc/pihewukuw/iphone-child-tracker.html wibree,  is a subset of bluetooth v4.0 with an entirely new protocol stack for rapid build-up of simple links. As an alternative to the bluetooth standard protocols that were introduced in bluetooth v1.0 to v3.0, it is aimed at very low power applications running off a coin cell. Chip designs allow for two types of implementation, dual-mode, single-mode and enhanced past versions.
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