Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances (up to approximately 180-200 meters) and building personal area networks.
Bluetooth Classic is mainly used to enable wireless audio streaming and has become the standard radio protocol behind wireless speakers, headphones, and in-car entertainment systems. The Bluetooth Classic radio also enables data transfer applications, including mobile printing
BLE supports multiple communication topologies, expanding from point-to-point to broadcast and, most recently, mesh, enabling Bluetooth technology to support the creation of reliable, large-scale device networks.
The latest Bluetooth version is Bluetooth 5.3. Most current Bluetooth enabled products now operate on BLE or ‘Bluetooth Smart’ standards, building on the principles established in Bluetooth 4.0 or 4.2