What is Bluetooth connection?

Bluetooth is a familiar term for users of technology devices such as phones, laptops, etc. To understand more about this type of connection, please refer to the content of the article below!

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What is Bluetooth connection?

Bluetooth is the short-range wireless exchange of data between electronic devices . This technology supports the transmission of data over short distances between mobile devices such as mobile phones, tablets, laptops with each other and with fixed devices without the need for a cable to transmit .

Bluetooth uses 2.4GHz radio waves . Although they use the same frequency as Wifi technology, they do not conflict with each other because Bluetooth uses frequencies with shorter wavelengths.

Bluetooth is an electronic standard , which means that manufacturers who want to have this feature in their products must follow the Bluetooth standard requirements for their products. These specifications ensure that devices can recognize and interact with each other when using Bluetooth technology.

Current Bluetooth connection standards

– Bluetooth 1.0 : Approximately 1Mbps speed but many compatibility issues.

– Bluetooth 1.1 : Bug fix version of 1.0 but no change in speed.

– Bluetooth 1.2 : Time to detect and connect between devices is accelerated, transmission speed is also faster than standard 1.1.

– Bluetooth 2.0 +ERD : Announced in July 2007, this new standard is more stable and offers faster sharing speed while saving energy when in use.

– Bluetooth 2.1 +ERD : There are advantages that version 2.0 has, in addition, Bluetooth 2.1 also has a small-range connection mechanism.

– Bluetooth 3.0 + HS (High Speed): Introduced on April 21, 2009, this connection standard has a theoretical speed of up to 24Mbps. Devices that support Bluetooth 3.0 but do not have +HS will not achieve the above speed. Despite the high speed, Bluetooth still only supports the need to quickly share low-volume files or connect to speakers, headphones …

– Bluetooth 4.0 : Released in June 2010, version 4.0 is a combination of “classis Bluetooth” (Bluetooth 2.1 and 3.0), ie both fast transmission and more energy efficient.

– Bluetooth 4.1 : In 2014, Bluetooth upgraded to version 4.1 to improve the data overlap of Bluetooth with 4G networks, maximize performance by self-regulating bandwidth, and save more energy by optimizing time reconnection timeout.

– Bluetooth 4.2: Another upgrade in 2014, improving transmission speed up to 2.5 times compared to 4.1, saving more energy, limiting connection errors as well as good security. At the same time, the most important feature is the support for sharing the internet connection according to the IPv6 protocol.

– Bluetooth 5.0 : The latest generation currently released by SIG on June 16, 2016 with many outstanding improvements such as 4 times wider coverage, twice faster speed and 2.5 times more power saving times compared to 4.0.

Applications of Bluetooth

The function that is probably most familiar to people when using Bluetooth is transferring files, but the reality is that it can do much more.

The outstanding applications of Bluetooth include:

– Wireless control and communication between a mobile phone and a wireless headset.

– Wireless networking between personal computers in a narrow space requires little bandwidth.

– Communicates wirelessly with computer input and output devices, such as mice, keyboards, and printers.

– Replace traditional wired serial communications between measuring devices, navigation devices, medical devices, barcode scanners, and traffic control devices.

– Replace the controller uses infrared rays.

– Send files between other Bluetooth-enabled devices.

– Remote control for video game devices.

– Connect to the Internet for computers by using mobile phones instead of modems.

Advantages and disadvantages of Bluetooth technology

Advantage:

– Completely replace the wiring harness.

– Completely harmless to human health.

– Secure security with internal encryption technology. Once the connection is established, it is difficult for any device to eavesdrop or steal data.

– Devices can connect to each other within 20m without face-to-face (currently there is a Bluetooth connection up to 100m).

– Connecting your phone and Bluetooth headset makes it easy to listen to the phone while driving or busy.

– Low price.

– Low power consumption, 0.3mAh standby, up to 30mAh in data transfer mode.

– Do not interfere with other wireless devices.

– High compatibility should be supported by many hardware and software manufacturers.

Defect:

– Low speed, about 720kbps max.

– Poor reception when there are obstacles.

– Long setup time.

Security solutions in Bluetooth

To ensure the safety of the device, users should note the following:

– Turn on Bluetooth only when necessary.

– Keep device in ‘hidden’ mode.

– Periodically check the list of paired devices.

– Encryption is recommended when setting up Bluetooth with the computer.

– Use anti-virus software, periodically scan for viruses.

Is a familiar and quite useful wireless connection, although not optimal, but provides very practical support for users of mobile devices. In the 4.0 period, you will easily see it in more and more not only in electronic devices, but also in household appliances, to optimize the service to human needs.