Bluetooth is a wireless technology for creating personal networks operating in the 2.4 GHz unlicensed band, with a range of 10 meters. Networks are usually formed ad-hoc from portable devices such as cellular phones, handhelds and laptops. Unlike the other popular wireless technology, Wi-Fi, Bluetooth offers higher level service profiles, e.g. FTP-like file servers, file pushing, voice transport, serial line emulation, and more.
The Bluetooth stack in FreeBSD is implemented using the Netgraph framework (see netgraph). A broad variety of Bluetooth USB dongles is supported by the ng_ubt driver. The Broadcom BCM2033 chip based Bluetooth devices are supported via the ubtbcmfw and ng_ubt drivers. The 3Com Bluetooth PC Card 3CRWB60-A is supported by the ng_bt3c driver. Serial and UART based Bluetooth devices are supported via sio, ng_h4 and hcseriald. This section describes the use of the USB Bluetooth dongle.
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