![]() Given its low energy consumption and well-developed profiles, such as GATT, BLE is an ideal short-range wireless protocol for Internet of Things (IoT) devices, when compared to competing protocols, such as ZigBee, Bluetooth classic, and Wi-Fi. It defines how ATT attributes are grouped together into sets to form services. GATT provides profile discovery and description services for the BLE protocol. According to the Bluetooth SIG, GATT is built on top of the Attribute Protocol (ATT) and establishes common operations and a framework for the data transported and stored by the ATT. Wikipedia currently lists 36 definitions of Bluetooth profiles defined and adopted by the Bluetooth SIG, including the Generic Attribute Profile (GATT) Specification. The newer generation Bluetooth 5 provides a theoretical 4x range improvement over Bluetooth 4.2, from approximately 200 feet (60 meters) to 800 feet (240 meters). Several key factors influence the effective range of a reliable Bluetooth connection, which can vary from a kilometer down to less than a meter. BLE supports data rates from 125 Kb/s to 2 Mb/s, with multiple power levels from 1 milliwatt (mW) to 100 mW. ![]() According to the Bluetooth SIG, BLE is designed for very low power operation. Bluetooth Low Energy (Bluetooth LE or BLE) is a wireless personal area network (WPAN) technology designed and marketed by the Bluetooth Special Interest Group (Bluetooth SIG). Getting Started with Bluetooth Low Energy and Generic Attribute Profile Specification for IoT IntroductionĪccording to Wikipedia, Bluetooth is a wireless technology standard used for exchanging data between fixed and mobile devices over short distances.
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