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Bluetooth 4.0 adds “low energy (LE) mode” Core Specification Released by BSIG

Bluetooth 3.0-capable devices may have only begun appearing, but Bluetooth Special Interest Group is advancing the short-range wireless standard by rolling out the core specification of version 4.0. Interoperability testing for Bluetooth 4.0 implementations will take place at UnPlugFest 37 in Barcelona, Spain on October 4th-8th.

“Bluetooth 4.0 introduces low energy (LE) mode, which consumes only a fraction of power that classic Bluetooth does, enabling a lifespan for devices comparable to active RFID. BSIG says devices powered by single button-cell batteries can operate for more than a year without recharging. Low energy Bluetooth operates in 2.4GHz ISM band, and uses a frequency-hopping transciever to avoid interference and signal degradation. It’s made up of 40 physical channels, spaced 2 MHz apart. Low energy networks are formed by three different types of Bluetooth devices, ones that broadcast packets one way, ones that listen for these packets, and ones that can engage in a two-way conversation.”

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