In 1997, Jim Kardach proposed the name "Bluetooth" for the new technology that would unify communications protocols like King Harald had united Scandinavia. Fast-forward to 1994, when Ericsson's R&D teams started investigating ways to connect computers and the "smartphones" of the day without cables. In the tenth century, the Viking king Harald Blåtand (Harald Bluetooth in English) united large swathes of modern-day Norway and Denmark under his rule. MORE: All Networking ContentMORE: Networking in the Forums MORE: Wireless Routers 101MORE: Router SoC 101 Finally, some laptops and smartphones require both LE modes and BR/EDR modes, and this capability is offered by so-called "dual-mode" Bluetooth solutions.
Sensors, "smart" lightbulbs and other "smart home" devices are the ideal use-case for Bluetooth LE. Bluetooth LE is designed for short bursts of small data packets over a longer range in order to conserve battery life. The former establishes short-range connections for continuous data transfer (think headsets streaming music from a smartphone).
Texas Instruments CC2560/64 Bluetooth evaluation moduleĬurrent implementations of Bluetooth come in two flavors: Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR) and Bluetooth low energy (LE), also called Bluetooth Smart. Even the low-power Class 2 and Class 3 devices are capable of greater than 10-meter range with the new networking and modulation schemes introduced by the Bluetooth standard in March 2016. Where Wi-Fi enables wireless local area networks (WLANs) and ties together devices around some venue, Bluetooth enables wireless personal area networks (PANs) to enable communication in a 10-meter range (for Class 2 and Class 3 Bluetooth devices) and more than 100-meter range for Class 1 devices, mostly used for industrial applications. It could be considered a short-range sibling of Wi-Fi. In a nutshell, Bluetooth is a wireless communication specification operating on the unlicensed 2.4GHz band. This article is an in-depth look at everything Bluetooth: the science, the tech, the security and the standard.
Bluetooth is fascinating, though-not just for its technical operation, but for the multi-national conglomerate of corporations standing behind it, and the work they do behind the scenes to makes sure Bluetooth is the standard.
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