How Bluetooth works?
Sunday, November 01, 2015 ece
Technology keeps changing everyday and is making our lives much simpler.Among this includes bluetooth technology. With Bluetooth we are able to easily share songs,movies,photos easily.
Bluetooth is a wireless technology standard for exchanging data over short distance of upto 10 m between mobile phones,smart phones,laptops,tabs etc. It was invented in 1994 by telecom vendor Ericsson. IEEE standarized bluetooth as IEEE 802.15.1and it is a type of Personal Area Network. Bluetooth uses frequency range from 2.4 GHz to 2.485 GHz. This frequency range has 79 channels each of 1 MHz.
Bluetooth devices automatically detect and connect to another device & at the same time upto eight devices can be connected each using a seperate channel out of 79 available channels. Don't worry about the interfacing of bluetooth with any other electrical device because it has two reasons that avoids interfacing :-
a). Bluetooth operates at very low power and your device transmitter won't carry signal far than about 10 m.Because of this short range transmission,bluetooth is more secure than Wi-fi.
b). To minimize interfence & to provide secure transmission, bluetooth devices constantly change the channel they are using out of 79 available channels. The rate of shifting of channels is about thousands of time per second.