Bluetooth is a wireless protocol utilizing short-range communications technology facilitating data transmission over short distances from fixed or mobile devices, creating wireless personal area networks.The intent behind the development of Bluetooth was the creation of a single digital wireless protocol, capable of connecting multiple devices and overcoming issues arising from synchronization of these devices.Bluetooth uses a very robust radio technology called frequency hopping spread spectrum.It chops up the data being sent and transmits chunks of it on up to 75 different frequencies.In its basic mode,the modulation is Gaussian frequency shift keying (GFSK).It can achieve a gross data rate of 1 Mb/s.
Bluetooth provides a way to connect and exchange information between devices such as mobile phones, telephones, laptops, personal computers, printers, GPS receivers, digital cameras, and video game consoles over a secure, globally unlicensed Industrial, Scientific, and Medical(ISM) 2.4 GHz short-range radio frequency bandwidth. The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group (SIG).
Bluetooth is a standard and communications protocol primarily designed for low power consumption, with a short range (power-class-dependent: 1 meter, 10 meters, 100 meters) based on low-cost transceiver microchips in each device.Bluetooth enables these devices to communicate with each other when they are in range. The devices use a radio communications system, so they do not have to be in line of sight of each other, and can even be in other rooms,as long as the received transmission is powerful enough.Bluetooth device class indicates the type of device and the supported services of which the information is transmitted during the discovery process.
The range of different classes
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(Courtesy:- wikipedia)
The range of different classes
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