In 2010, a new version of Bluetooth (Bluetooth 4.0) was introduced, known as Bluetooth Low-Energy (BLE) or Bluetooth Smart. Originally designed as a replacement for wired serial connectivity such as RS-232C, Bluetooth now supports almost three dozen different profiles that include hands-free devices, human interface devices, phone book profile, and many more. Most of us know the Bluetooth standard as the way we connect a phone to our car or a headset for hands-free operation. Bluetooth technology is focused on short-range wireless connectivity.
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