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 ".