Bluetooth Low Energy (BLE), also known as Bluetooth Smart, was introduced with Bluetooth 4.0 in 2010. BLE was designed to address the growing demand for energy-efficient wireless communication for battery-powered devices, such as fitness trackers, smartwatches, and IoT sensors. Unlike classic Bluetooth, which was optimized for continuous data streaming, BLE is optimized for brief, periodic data exchanges. This makes it ideal for applications where long battery life is essential, and only small amounts of data need to be transmitted intermittently.