This slide reviews some Bluetooth terms that will be used in this presentation. Bluetooth classic is a legacy standard for personal area networks that was made popular by audio streaming to cell phone headsets. It operates in the 2.4-GHz ISM band with GFSK modulation and supports up to a 3-Mbps data rate. Many people have used a Bluetooth headset in the last five to ten years when using a cell phone. Those headsets are created on the Bluetooth Classic protocol. In 2010 a new standard was adopted especially for short-range, low-power wireless applications that only need to communicate state or control information. It is called Bluetooth Low Energy (BLE). The BLE standard also continues to operate in the 2.4-GHz band, but supports a slower 1-Mbps data rate. It is important to note that BLE is not backwards compatible with Bluetooth Classic. Bluetooth 4.0 is an upgraded Bluetooth classic specification that adds the BLE support, and Bluetooth 4.1 is an enhanced Bluetooth 4.0 specification which was adopted in December 2013. It improves security, lowers power and also raises throughput. Bluetooth Smart is marketed brand for Bluetooth 4.0 or 4.1 products that support only BLE, whereas Bluetooth Smart Ready is a brand for Bluetooth 4.0 or 4.1 products that support both Bluetooth Classic and BLE. These Smart Ready products are also sometimes called Dual Mode. On the bottom right, an example of these products is shown. On the left is a cell phone which is a Bluetooth Smart Ready product which supports both classic Bluetooth and BLE. On the right side is a headset that is only a Bluetooth Classic product and lets the user stream audio between the headset and the phone, and the bottom device is a fitness band which is a Bluetooth smart product, only supporting BLE. It strictly sends sensor data from itself to the phone.