bluetooth technology
bluetooth technology

What is a Bluetooth Technology?

The Bluetooth technology is a wireless technology; it’s used to transfer the information between the various electronic devices. The space between the 2 devices is very short from the fixed, mobile device and building a personal area network. This technology is developed by the Bluetooth special interest group and its physical range is from 10m to 100m. The Bluetooth device can connect up to seven devices and it’s used in the industry like smartphones, personal computers, and gaming consoles, etc. This technology doesn’t need any cables, cords, and adapters to communicate with other devices.

Why Its name is Bluetooth?

how bluetooth got its name

Bluetooth was named for the 10th century Viking King, Harald Blatand (A.K.A, Bluetooth) who peacefully united all the small island kingdoms of Denmark, southern Sweden, and southern Norway into one country. In keeping with its namesake, Bluetooth, the new low-priced radio technology is designed to unite or connect all different types of devices to effectively work as one.

What is Bluetooth used for?

use of bluetooth

Early Bluetooth versions allowed users of mobile phones, pagers and personal digital assistants to buy a three-in-one phone that could double as a portable phone at home or in the office, get quickly synchronized with data in a desktop or notebook computer, initiate the sending or receiving of a fax, a printout, and, in general, have all mobile and fixed computer devices be fully coordinated over a short distance.

More recent Bluetooth versions make it possible for a user to place hands-free phone calls through a mobile phone or connect wireless headphones to a smartphone’s music playlist, as an example. Bluetooth technology will simplify tasks that previously involved copious wires strewn among peripheral devices. for example, with a Bluetooth-enabled printer, one can connect wirelessly with a desktop, laptop or mobile device and print out documents. it’s also possible to sync a wireless keyboard with a tablet-style device, such as an Apple iPad or Kindle Fire, or even a DVD player with a television.

Working of Bluetooth

working of bluetooth

The Bluetooth network has a personal area network or piconet that contains 2-8 Bluetooth peer devices, generally a single master and up to seven slaves. One master is a Bluetooth device, it communicated with the other devices. It’s governed the communication link & traffic between itself and slave devices are associated with it. The slave device is also a device and it has responded to the master devices.

Slave devices are needed to synchronize their transmit or receive timing with the masters. Additionally, the master device governs transmissions by slave devices. Specifically, a slave only begins its transmissions in a time slot immediately and it was addressed by the master or explicitly reserved for use by the slave device.

The Bluetooth Device Address (BD_ADDR) of the master device outlines the frequency hopping sequence. The master device 1st sends a radio signal asking for a response from the particular slave devices within the range of addresses. The slaves synchronize their hop frequency as well as the clock with the master device.

Bluetooth technology needs that a low-priced transceiver chip is included in each device. The transceiver transmits and receives in a previously unused frequency band of 2.45 GHz that’s available globally with some variation of bandwidth in different countries. In addition to information, up to three voice channels are out there. Each device has a distinctive 48-bit address from the IEEE 802 standard. Bluetooth connections can be either point-to-point or multi-point.

The maximum Bluetooth range is 10 meters. Data will be exchanged at a rate of 1 Mbps to 2 Mbps in the 2nd generation of the technology. A frequency hop scheme allows devices to communicate even in areas with an excellent deal of electromagnetic interference. Built-in encryption and verification are provided.

Bluetooth Versions Specification

Bluetooth v1.0 to v1.08 Bluetooth hardware device and address

Bluetooth v1.1 IEEE Standard 802.15.1-2002

Bluetooth v1.2 Faster connection

Bluetooth v2.0+EDR Enhanced rate

Bluetooth v2.1 Secure simple pairing

Bluetooth v3.0 High-speed data transfer

Bluetooth v4.0 Low energy consumption.

Different Types of Bluetooth Technology

The following are the classification of the Bluetooth technology

  • Bluetooth headsets
  • Stereo headset
  • In- car Bluetooth headset
  • Bluetooth-equipped printer
  • Bluetooth enables webcam
  • Bluetooth keyboard
  • Bluetooth GPS device

Advantages of Bluetooth Technology

  • With the Bluetooth technology, there’s an economic solution for the short distance
  • There is no setup file to install the Bluetooth. It has a built-in software.
  • Usually, we can see the Bluetooth in the smartphones, music players and speakers.
  • Global technology specifications are utilized in the Bluetooth
  • With IrDA, there is not any line of sight restriction.
  • Power Consumption makes integrated into battery-powered devices practically.
  • 2.4 GHz radio frequency ensures worldwide operability.
  • Tremendous momentum not only within the computer industry but also in other industries like cellular phones and transportation.


Bluetooth Applications

  • The internet bridge

An extension of this model could be a mobile computer that enables surfing the internet irrespective of the location of the user and regardless of whether the user is cordlessly connected through a mobile phone through a wired connection (e.g. PSTN, ISDN, LAN,xDSL)

  • Automatic check-in

Hotels are testing the services that allow guests to check in, unlock room doors and even control the room temperature with handheld devices equipped with Bluetooth Technology.


  • It separates the band into hops. This spread spectrum is used to hop from one channel to another, which adds a robust layer of security.
  • Up to eight devices are networked into a piconet.
  • Signals can be transmitted through walls and briefcases, so eliminating the need for line-of-sight.
  • Devices don’t need to be pointed to each other, as signals are omnidirectional.
  • Governments worldwide regulate it, so it’s possible to utilize the same standard wherever one travels.

Bluetooth Techniques

Bluetooth connections are established via the subsequent techniques:-

  • Standby
  • Page/Inquiry
  • Active
  • Hold
  • Sniff
  • Park



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