When we were younger , we used to think that some kind of magic or mysterious methods are involved whenever 2 or more thingummies , actually devices , are talking to each other , in other words , connected together without any form of physical or apparent connector like a wire or a cable . Now , we grew up enough to figure out that there must be some science and technology behind this kind of communication , and we no longer wonder about that man in the street talking to himself , cause he is just on a phone call . One of the most impressive wireless connections is Bluetooth . It was invented by " Dr Jaap Haarsten " in 1900s , so let ' s try to fully understand how Bluetooth actually works .
• Simply , instead of wires and cables , Bluetooth uses radio waves to connect devices to each other wirelessly .
• All we need is to equip each device we want to provide with Bluetooth , with hardware & software components .
• The hardware here is just a tiny chip equipped with an antenna , which send out and receive radio waves , we can say these antennae act as those of the insects '.
• The software in each device interprets those radio waves into information that the other device can understand and act upon .
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• Let ' s take , for example , 2 devices which are equipped with Bluetooth technology like a smartphone & a headset , each of them has that chip we mentioned , so both can transmit and receive radio signals . Both of them have a software as well , which acts as an interpreter of those exchanged signals , so that these 2 devices can understand each other ' s language and respond to it . The radio waves Bluetooth uses , are of low power , their frequency ranges between 2.402-2.480 GHz . This short frequency band -which is composed of 79 frequencies only- is called an " ISM band ".
• ( on a side note , radio waves normally have frequencies ranging from 300 GHz to as low as 3 kHz , so in comparison Bluetooth uses a low-power , short band of frequency ).
• Such low powered waves actually add up to the Bluetooth technology ; each signal only consumes 1 milliwatt , which is considered as nothing when it comes to power , so it won ' t drain our batteries , which is so practical in our daily lives nowadays , so we are able to use Bluetooth without having to worry about our batteries at all .
• Bluetooth provides a short range of communication within a 10m2 area , because the low power of the used
chips ( the transmitters ) won ' t be able to carry signals far away . However , this short range of connectivity is definitely not a drawback , since it was designed with limited wavelength production to accomplish the task needed properly ( which is quick transferring of data over short distance ).
• The amount of data transferred depends on the version of Bluetooth used , it ranges between ( 1Mbps up to 24Mbps ).
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• The networks Bluetooth creates , and through which data is transferred , are called " Piconets ".