Bluetooth version 4.0 introduced Bluetooth with low energy functionality, sometimes referred to as Bluetooth Smart, which gave developers the ability to create sensors that can run on coin- cell batteries for months and even years at a time. Some of these sensors are so efficient that the kinetic energy from just flipping a switch can provide operating power.
Bluetooth low energy technology is inherently different from BR/EDR. BR/EDR establishes a relatively short-range, continuous wireless connection, which makes it ideal for uses such as streaming audio from a smartphone to a headset.Bluetooth low energy technology allows for short bursts of long range radio connections, making it ideal for IoT applications that depend on long battery life.
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