... It goes on to crack a shark, rush on anybody, but only about adapters Bluetooth wireless technology to handheld computers. Incidentally, this is the most fashionable at the time of issue. Hit of the season. Global bestseller. Let's look at the current, already available to us, the use of Bluetooth, and to applications of tomorrow. Especially because tomorrow begins today. Hence, the wait for the future remains rosy for long ...
Honestly now
Surveying the current state of things, with some sadness that you notice - the technology of wireless high-frequency communication is not yet very accessible. The cost of adapters is high (for the most inexpensive models greatly surpasses one hundred dollars), but because a complete solution for private, personal use remains the eternal question of how the world - to be or not to be.
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However, it all depends on the thickness of the purse. Young student, hardly accumulated on a budget Palm with a monochrome screen, a prospect to get a Bluetooth module is not smiles. Solid, good earning, middle-aged gentleman to spend four or five hundred for a set of Bluetooth adapters are quite capable of ... What can I say? Youth has one not very nice feature - it passes quickly. The fact that in his early years seem unsupportable, tomorrow will be the prankish trifle. Yes, and Bluetooth technology develops by leaps and bounds. Soon it will happen the same thing happened with electronic memory - it will inevitably fall in price ... The high price of Bluetooth adapters significant, but perhaps their only drawback. It is true that comparison. Except for a new Bluetooth (this standard, said a few years) from the wireless PC peripheral devices we only have an infrared port - IrDA. Infrared serial port - direct descendant of the usual two-wire asynchronous serial port, the oldest of all. His main drawback - low speed data transmission - is inherited from the COM-port. For transmission over a single wire (the second grounding wire) data together in packages - a sequence of bits into which the first and last included special control bits. These bits are used to indicate the beginning and end of packet transmission, so the port does not require clock signal and a separate wire for it (so the port is called asynchronous). The downside of this simplicity - the bag has a small amount, but the transfer is carried out consistently, package by package. Receiving port receives the first service pack bits and transferred to the reception mode information. After receiving the entire packet, the receiving port receives the latest service pack and stop bit reception. Then everything is repeated.
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The same data transmission technology - packet sequence incorporating the official bits - used in IrDA. It is clear that it does not allow to achieve high rates of exchange (the COM-port and IrDA - 115,2 bps). But the high rate of conventional IrDA (there is a high-speed version of the infrared port, but he has not received proper distribution) are not available, affects another drawback of optical wireless communications - susceptibility to interference. For reliable communication window transceivers (LED) infrared ports of two devices must be located at 10-20 cm is strictly opposite to each other. In the way of the light beam should not be any obstacles. Hindrance may be a ray of sunlight or occasional glare from the mirror. In short, the hassle of missing ... Finally, the third major drawback of infrared port - at the same time connection can be established only between two devices.Networked dozen mobile devices through IrDA impossible (although it is theoretically possible to receive an information signal to several devices - if you can arrange them in the optical axis of the infrared beam). All of these defects have been remedied in Bluetooth. Communication takes place in a microwave radio 2.4 - 2.4835 GHz transceiver (transceiver) low power (milliwatts account goes on - as in radio-equipped toys). Communication range does not exceed 100 meters (for example - the toy radio range of 27 MHz at a power output of 100 milliwatts have an effective range of communication in the same 100 meters), but usually lacking, and 10 meters. The fact that Bluetooth, as well as an infrared port, intended for communication between a PC and peripherals - printers, digital cameras and so on, or between mobile devices - cell phones or handheld computers, or between "big" computer, phone or PDA. In any case, talking about hundred meters is not necessary. This note makes sense, because until recently the spread of the standard Bluetooth (and, let's add a competing standard, Air Port by Apple) in our country is hampered by objections to the supervisory bodies. It was assumed that high-frequency communications can make radio interference into the work of industrial and other radio equipment. In this case, cited arguments such as the presence of interference from CB radios receive television broadcasts. But the connection CB (the same range of civilian - Citizen Band) is on the border (between short-and ultrashort-wave range) 27 MHz, and the permissible transmitter power is 5 watts! Bluetooth radio band with nothing does not intersect, and the power is so insignificant that it can not be compared even with the power of the emitted radio signal very safe in this respect, cell phone ... That is why, incidentally, looks so attractive in the application of Bluetooth headsets handsfree - and the hands are free, and no wires, and safety are fully complied with ...
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Yet - as this new "Pribluda (slovechko!) work? What she knows?
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First, before you spend money on the purchase adapter set (and a Bluetooth module for, say, your Pocket PC to purchase does not make sense as it makes no sense to buy a portable radio CB - if we continue this "radioanalogiyu" - at least until the Bluetooth has not received widespread distribution), we should find out what problems we're going with a Bluetooth address. Secondly, you should really look at things - to combine the wireless network a modern laptop and an old dot matrix printer can only theoretically and is almost impossible (and unnecessary!) In practice. Third, do not hurt to calculate costs and relate them even with the potential, but - profitably. Funny to throw to the winds of almost four hundred dollars, to be able to play online toy (if they generally exist) on a pair monochrome Palm m100. Bluetooth - is the ability to automatically and instantaneously organization samokonfiguriruyuscheysya wireless network. And therefore the greatest benefit from the new equipment will be in the first place, the owners of laptops. Portable personal computer - the thing in itself, able in most cases operate autonomously without any connection whatsoever devices. In practical terms, the main advantage of the laptop is not available in his battery, which provides work for two to three hours without connecting to the mains, and almost complete freedom from cable clutter on the desk.In fact, how often do we open his laptop in the field? So whether we need a computer away from the workplace or at home? Most often we use a laptop as a working machine - for word processing and internet connection. But the road to take a Pocket PC (who he is, of course) because it is smaller, lighter, from the built-in battery lasts longer, and tasks that are assigned to it in a way that does not require a full-featured notebook computer (if you Of course, not Lenin in flood - to write treatises on the knee).
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Thus, providing laptop adapter, Bluetooth, we have the opportunity to get rid of the printer cable, sync cable to the handheld computer from the network cable, and eventually even the tail of the computer mouse (in the announcements of computer companies are equipped with radio controllers have already appeared). Leaving only the mains cable and telephone wire ... All this will require considerable investments - peripherals must also be supplemented by Interface Bluetooth. But there are options. For example - purchase module hub, splitter with integrated transceiver Bluetooth, which can connect multiple peripherals. Or - to use an external Bluetooth module to connect via USB. Such a device makes it possible without too much trouble to equip wireless high-speed interface of desktop personal car, not getting into her insides. Incidentally, today issued a Bluetooth module for computing have different designs. They come in the form of flash memory cards - MMC / SD or CF, in the form of cards of standard PC card, in the form of plug-ins to connect to the USB port and a PCI card for integration into personal computers.
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| Palm m515 with a Bluetooth-card format Secure Digital |
The most interesting is the module in the form of flash memory cards. With a simple and inexpensive adapter PC card - CF (or MMC, depending on the card format), the module can be connected to a laptop, and without an adapter - to the PDA. That is, a pair of identical modules provides wireless high-speed synchronization between laptop and PDA. A detection in the vicinity of a pocket typewriter her brother to the current adapter, Bluetooth - instant network connections and her ... Same goes for the laptop. It takes the signal from any laptop or PDA with a module Bluetooth. Network connection is established immediately. Another obvious application modules of the wireless Bluetooth - synchronizing Pocket PC and notebook (or, I think, is inappropriate here - only "and") with a cell phone. This, however, the topic of a large, interesting and requires a separate discussion. Details in the next article, "Jaws 2", but something can be said now. Any owner of a cell phone (and they seem to be no less than PC owners, and much more than users of handheld devices) suspects that combine cell phone and computer in any way possible. But not all phones have an infrared port, and not all computers (dozhili!) - serial COM-port. And the cable for connecting the phone to the serial port of your computer - is not at all. And in general, too much fuss - look for the cable, spend money on it, to suffer with the connection. And the result? Download new ring tones? Funny ...
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Bluetooth adapters are available for almost all phone models, starting with the most inexpensive. With their help, phone, a PDA and a laptop (or desktop) are practically inseparable.Create a phone book directly into Outlook, it simultaneously synchronize with a PDA and a phone, immediately call the selected number or connect to the internet via cell phone. And, with any device - even a PDA, even with a laptop ... Yet details about this should talk some other time. In the meantime, try to look at the day tomorrow. What joy in store for us technology Bluetooth? ..
Rainbow tomorrow
Bluetooth uses much more than I have mentioned in this article. One of them gives me as a user laptop and handheld computer, rest. Although I do not know - how this possibility has become reality. Do not know yet ... I'm not too attracted a wireless connection to the Internet. Job Service GPRS still not established, to apply it in practice (it is only fair to admit that I simply do not have the phone with support GPRS). And not that it's probably cheap - not cheaper than wired. In a word - not yet happened. Now, if to do so, and access was wireless, and pay for it would have the same dime as a traditional dial-up. Manilovism clean water ... If no Bluetooth ... That's what a sweet picture drawn in my imagination spoiled. I lie on your couch like oriental sultan. In the hands - pocket machine (and even though my true lamb "Beshka" - Casio BE-300). On-screen typewriter having web-page. I look at them lazily. Then run a cartoon about a sweet chudilku Masyanya. Then listen to the music MP3. Then something else.
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The point is that the Internet connection in the usual way - via a laptop and built in his modem connected to an outlet telephone network. Bilateral exchanges between the CPC and the notebook (again - or desktop, what people are rich) is carried out by a pair of modules Bluetooth, one of which is connected to a large, and the other to a small computer ... Is this possible right now, not in a hypothetical tomorrow? And why not? Such a system Air Port in the Macintosh operating very successfully, even (though there is a Pocket PC speech does not go, or connect your desktop PC and laptop, or a pair of desktop, notebook or a couple). What is Bluetooth is worse? Okay, pull yourself together as soon acquire this technology, so check it ... In the meantime, I will give publicity his other dream - a multi-function portable media center. Imagine the same laptop hard drive is stored wow selection of music tracks in MP3 format and video to MPEG4 (and what there is - on my laptop has it all). Take in the hands of the CCP and ... No does not grab a Bluetooth audio and video files. A - plays them the same way as when you connect to the Internet. Media content can be rewritten in the buffer memory in small amounts, appears on the screen of your Pocket PC. The buffer is cleared and takes the next portion of information. Due to the high rate of exchange of Bluetooth delays in playing no. And the memory of most handheld computer to anything. And save-convert does not need anything. Everything happens "on the fly, in real time ... It is true that a miracle? Modest to a handheld machine turns into a multi-media terminal ... If it is not only music and movies? And if game programs? And if you do not just play? Remember the idea of a public network diskless PCs and sginuvshuyu in a swift whirlwind of technological progress? And here it is, this same idea, but in a new guise. Pocket PC can be an ideal wireless terminals to access the resources of a PC. It is with Bluetooth PDA becomes a full extension of a large computer, not just the viewer for delayed viewing and player simple programs (also incompatible with the PC). Here's where to start off a genuine industry of handheld machines ... They say dreaming is not harmful. And I include the full power of your imagination, imagine a digital camera, or (for a walk, so walk!) Camera interface Bluetooth ...Memory a little? Yes, why should we memory? In the shoulder bag we have is a laptop, which writes to the hard drive all in camera. And no tapes and no flash memory card ... Although, why a laptop? Maybe it's a special drive adapter Bluetooth, which is capable of recording at a distance of any information, such as those portable drives with autonomous power supply and built-in reader for flash memory cards that are sold today in Moscow's shops inexplicably exorbitant prices? .. By the way, you do not know - whether embed Bluetooth in gubozakatochnye cars? It looks like a contender for this technique is already ;-) authors, translation:
