Blue Tooth

BLUE TOOTH

WHAT IS A BLUE TOOTH TOOTH is an open wireless protocol for • BLUE exchanging data over short distances (using short

exchanging data over short distances (using short radio waves) from fixed and mobile devices, creating personal area networks. • It was originally conceived as a wireless alternative to RS-232 data cables. • It can connect several devices, overcoming problems of synchronization • The name BLUE TOOTH comes from tenth century Danish King Harold Bluetooth

IMPLEMENTATION • BLUE TOOTH uses a radio technology called frequency –

hopping spread spectrum, which chops up the data being sent and transmits chunks of it on up to 79 frequencies. • In its basic mode, the modulation is Gaussian frequency-shift keying (GFSK) .It can achieve a gross data rate of 1 Mb/s. • BLUE TOOTH provides a way to connect & exchange information between devices such as mobile phones ,laptops, personal computers, digital cameras etc through a secure, globally unlicensed Industrial , Scientific and Medical (ISM) 2.4 GHz short-range radio frequency band width. • The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group (SIG) . The Bluetooth SIG consists of companies in the areas of telecommunication, computing, networking and consumer electronics.

IMPLEMENTATION • Blue tooth is a high speed low

power wireless link technology . • On the basis of power consumption and range it is divided into three classes of 1 metre ,10 metre and 100 metres.

APPLICATIONS • Wireless control of and communication between • • • •

a mobile phone and a hands- free head set This was one of the earliest applications. Wireless networking between PCs in a confined space and where little bandwidth is required. Wireless communication with PC input and output devices like mouse , keyboard etc. For low bandwidth applications where higher band width is not required and cable –free connection desired. Wireless bridge between two Industrial Ethernet networks.

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