Bluetoothseadet

Bluetoothseadet is a device that uses Bluetooth wireless technology to exchange data or audio with other Bluetooth-enabled devices. The term is commonly used in Estonia to refer to any device that supports Bluetooth. Bluetooth covers a wide range of products, including headphones, speakers, keyboards, mice, smartphones, computers, cars, and various sensors. It operates in the 2.4 GHz ISM band and uses frequency hopping to minimize interference. Devices can communicate via Classic Bluetooth (BR/EDR) for higher data rates or Bluetooth Low Energy (BLE) for low-power, intermittent transmissions. BLE is widely used for sensors and beacons, while Classic Bluetooth handles more data-intensive tasks.

Common profiles and uses include A2DP for stereo audio streaming, HFP/HSP for hands-free calling, AVRCP for remote control, HID for keyboards and mice, and GATT-based services for BLE devices. Interoperability is ensured by standard profiles and versioned specifications; however, some features may require compatible hardware and software. Devices can often connect to multiple peripherals at once, depending on implementation and version.

Pairing and security involve discovery and the establishment of a trusted link. Pairing methods range from numeric comparison to Just Works or Out-of-Band authentication. After pairing, devices can bond to reuse encryption keys. Security risks such as eavesdropping or spoofing exist if devices are not updated or are used with weak pairing. Best practices include using strong passkeys, keeping firmware current, and turning off discoverability when not needed.

Versions and evolution: since the 1990s, Bluetooth has evolved through Classic BR/EDR and BLE, with improvements in data rate, range, and energy efficiency. Recent developments include LE Audio and isochronous channels to support multi-stream audio and better battery life. See also: Bluetooth, Bluetooth Low Energy, Bluetooth profiles, LE Audio.