BlueTooth | Stereo Bluetooth

BlueTooth

Beautiful and Simple Wireless Technology

Bluetooth technology was designed primarily to support simple wireless networking of personal consumer devices and peripherals, including cell phones, PDAs, and wireless headsets. Wireless signals transmitted with Bluetooth cover short distances, typically up to 30 feet (10 meters). Bluetooth devices generally communicate at less than 1 Mbps.

In 1994, a team of researcher from Ericsson Mobile, led by Dr. Jaap Haartsen and Dr. Sven Mattisson, did a feasibility study on low power wireless connectivity to eliminate cable, which later developed into Bluetooth technology in September 1998 by Bluetooth Special Interest Group (SIG). Ericsson, IBM, Intel, Nokia and Toshiba were the founding members of SIG.

Do you know that the name Bluetooth is borrowed from Harald Bluetooth, a king in Denmark more than 1,000 years ago.

Technical Detail

 

Bluetooth is a specification (IEEE 802.15.1) for the use of low-power radio communicationsBluetooth uses short-range radio frequency (RF) technology to transmit voice and data that varies from 2.402 GHz. to 2.480 GHz, a frequency rangereserved for medical, industrial and scientific devices. The effective range of the device is around 10 meters, whereas the high-powered Bluetooth will enable range of 100m. It is very unlike for interference from other radio frequency (RF) devices, because of the following reasons:

* It switches frequencies at the rate of 1600hops/sec.
* Data packets are very small.

Each Bluetooth enabled devices can communicate with up to seven other devices within its transmission radius.

Power consumption in Bluetooth is low as compared to the other devices such as Wi-Fi. Bluetooth radios draw 0.3mA in stand by mode and 30mA during the data transmission.

Bluetooth version 1.2 used to transmit 1 Mbit/s, whereas it increases significantly up to 3 Mbps in version 2.0. According to the new specification, Bluetooth 3.0 will adopt ultra-wideband (UWB) radio technology. This will allow for a very fast datatransfer of up to 480 Mbit/s.

How does it Work?

The electronic conversation happens automaticallybetween the Bluetooth enabled devices that come within their range. Once the network is established and conversation takes place they create a Personal-Area Network (PAN), commonly known as Piconet. If you have several Bluetooth enabled components, e.g. mobile phone, personal computer, mouse and printer, each of them form their own Piconet. All of the devices have their own range of addresses. When a computer is turned on, it sends signals to the other devices requesting responses with an address. Since mobile phone has that address, it responds and establishes a network. Even though it receives signals from the other systems, it ignores it, as it does not belong to the same network. As we have discussed earlier, it is very unlikely that two networks will have the same frequency at the same time.Bluetooth Applications
The applications of Bluetooth include:

* Wireless networking between computers

* Wireless communication between computer input and output devices

* Internet access computers and PDA using mobile phones

* Wireless control and communication between mobile phone and hands free headset.

Security

Wherever wireless connection is concerned, security is a major issue. Bluetooth operates on three different security models:

* Model 1: No security required, i.e. No Authorization or Authentication is required

* Model 2: Provide security in the Service Level once the channel is established, i.e. No Authorization is required, only Authentication is required

* Model 3: Provide security in the link level, before the channel is established, i.e. Both Authorization and Authentication are required.

While using Bluetooth if the user enables ‘non-discoverable’ mode, he will avoid connecting with other Bluetooth devices. There are three major threats involved using this technology:

* Bluejacking: Allow one Bluetooth user to sendbusiness card to other Bluetooth user within 10m. of radius

* Bluebugging: Allow hackers to access other’s phone remotely and its feature.

* Car Whisper: Allow hackers to send audio to others and receive audio from others.

Using devices at home is a good way to avoid security breachs in public.

Conclusion

Bluetooth technology is already widely using in the industry as it has the ability to handle both voice and data transmission simultaneously. It is allowing the end users to enjoy a variety of technology innovation such as wireless printing and fax, hands-free headset, and synchronizing mobile and laptop. Future of the Bluetooth technology lies in providing quality of service, enabling high quality audio and video data transfer, providing greater bandwidth and greater distance in a highly secure environment.

 Stereo Bluetooth

stereo Bluetooth

A stereo Bluetooth system can be made out of almost any powered pair of speakers with the Vertus solution, on one condition: that both speakers have 3.5 millimeter jacks.

Kickstarter project Vertus (in no way linked to Vertu), uses a technology called True Wireless Stereo from CSR in order to achieve that, and the way it works is pretty simple. You just plug in each one of the two adapters into a speaker, and pair your bluetooth device to the right (or master) one, which will then stream the left audio content to the left one (the slave one).

This is a simple method of using some old powered speakers to listen to music from your Android smartphone and it’s good to know that any of the dongles can also be used independently. Namely, you can stream audio to your car radio, headphones or maybe your home audio system.

You will get around 10 hours of music playback, after which you can charge the dongles using the supplied charging station that can be powered from a USB port. Both the adapters and the charging station look pretty good, as they’re made out of aluminum and will come in two colors, silver and gunmetal gray.

How to Pair a Smartphone With Your Car Using Bluetooth

Set Up Car and Smartphone

What you’ll need first is your smartphone. I’ve got my iPhone 4 here and we have a 2012 Acura TSX here in front of us. First, you want to set up on the phone by pushing the “Talk Command” button and giving your command to the car. “Setup.” Phone setup options are “Pair,” “Edit,” “Delete,” “Status” and “Set Pairing Code.” Press the “Talk” button and say a command. For a list of commands, select “Hands Free Help.” “Pair.” The pairing process requires operation of your Bluetooth phone. For safety, please only do this when the car is stopped. For proper system function, a compatible Bluetooth phone is required. Please visit the hands free website listed in the owners manual for a list of approved phones and other information. Hands free link is waiting to pair with a bluetooth phone.

Use Bluetooth to Pair Car and Smartphone

From your phone, search for Bluetooth devices and select “Hands Free Link” when prompted by your mobile phone; enter the code 0000. So you select it on your phone once it comes up and then it should bring up a screen. There we go, 0000. “Pair.” It says connected on my phone. “Hands Free Link” has connected to a new phone. A name is needed to identify this phone. Press the “Talk” button and say a name. For example, John’s phone. “Nick Jaynes iPhone.” “Has been successfully paired.” Now that we have the phone paired, we can do hands-free calling and stream music through the stereo.

Related articles

• Vertus wireless stereo music adapters hit Kickstarter (slashgear.com)
• Vertus Bluetooth kit adds stereo streaming to any pair of ordinary speakers (engadget.com)

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