What is Bluetooth, How it works, Benefits and its Harm

These days it seems that everything is wireless, and Bluetooth is a big part of that wireless revolution. You’ll find Bluetooth embedded in many types of consumer products, such as headsets, video game controllers, or (of course) liver trackers. So in this article, you will learn What is Bluetooth, How it works, Benefits, and its Harm.

What is Bluetooth, How it works, Benefits and its Harm
What is Bluetooth, How it works, Benefits and its Harm

What is Bluetooth? 

Bluetooth is a wireless LAN technology that connects various devices such as computers, telephones, printers, cameras, etc. All types of media files can transfer with Bluetooth.

History of Bluetooth 

Bluetooth, developed by Jaap C. Haartsen in 1994, has connected our lives to wireless networks today. The name Bluetooth is derived from an English version of Scandinavian Blatand (Old Norse). But it is said to have actually been named after the 10th-century King Harald ‘Bluetooth’ Blacker.

It has five different versions – 

1.1, 1.2, 0.2 plus EDR, 3.0 plus HB, 4.0 and 5.0

Bluetooth Range

A short-range radio transmitter is built into a Bluetooth device. The current data rate is 1 Mbps with a 2.4 GHz bandwidth.

Bluetooth uses a technique called a low-spread radio link for data transfer, i.e. data transfer via radiofrequency. Although this technology has now outdated, you will still see this technology in basic phones and Smartphones.

Bluetooth is a wireless technology a standard that connects devices in a short distance using short-wavelength UHF radio waves (ISM band 2.4 to 2.485GHz).

Bluetooth Architecture

There are two types of Bluetooth structure –

• Piconet
• Scatternet


It is a type of Bluetooth network that consists of a primary (master) device, which is calling a node in computer science. There are seven active secondaries (slave) devices other than the node. Therefore a maximum of eight devices (one master and seven slaves) can add to the Piconet.

Only one of the eight devices added to the Piconet can be a primary (master) node, although the primary node can be any device. Usually, the device that initiates the connection and the other devices are started by Connected to the network, the device is called a primary (master) node.

Because, Piconet has only one primary (master) node, which can send data to other nodes. So in the Piconet, the communication between primary (master) and secondary (slave) nodes can be one-to-one or one-to-main. One-to-one communication means that when a primary (master) node is sending data, only one secondary node can receive data. One-to-many communication means when the primary (master) node is sending data, more than one secondary node can receive data.

In a Piconet, the communication can only take place between the primary (master) node and the secondary (slave) node, with slave-slave communication being impossible in the Piconet. A maximum of 255 parked nodes can be added to the Piconet as well as seven active secondary nodes. These parked nodes are actually secondary nodes or slave stations, but these parked nodes cannot participate in the Piconet.

To participate in the Piconet, parked nodes must be converted to active secondary nodes. But when making this change it is necessary to take care of the maximum range of Piconet (one master node and seven slave nodes).


Bluetooth is a type of network that is fixed by connecting multiple piconets. In a Piconet that is a computer (machine) secondary (slave) node, the same node can function as a primary (master) node in another Piconet. Because of this, a station (machine or node) can be part of two piconets, but node-more piconets cannot have a primary (master) node.

As you know, scatter nets are fixed by connecting more than one Piconet. This means if a station (node) is a slave node in a Piconet and another Piconet has a master node. So that node, the Piconet that the slave has, can send data or messages from the Piconet to its slave nodes in the other Piconet (in which it is the master node).

Use of Bluetooth

What is Bluetooth, How it works, Benefits and its Harm, Use of Bluetooth
Use of Bluetooth

1. To play games

We can also play multiplayer games via Bluetooth. We can play by creating a local network between two phones. Although its reach is not much.

2. For safety

Bluetooth technology for home and car security is also present in the wireless entry system, through which you can open your home or car by pressing the button (on) on your Smartphone.

3. Remote

With the Bluetooth remote, you can also use the remote from anywhere in the room without putting it in front of the TV.

4. Keyboard and mouse

With Bluetooth keyboard and mouse, you can type and click from anywhere without worrying about accuracy. There is no worry of wires getting tangled in it.

5. Data Synchronize

Some devices also allow you to synchronize programs like your contact list, email, calendar, etc. It is a good medium for data transfer.

6. Bluetooth earpiece

By connecting the landline, cell phone to the Bluetooth earpiece, you can talk without holding the receiver of the phone.

How to connect to Bluetooth? 

To connect via Bluetooth, first, turn on the Bluetooth of your phone or tablet. When using a Bluetooth device, pair it with your phone or tablet. Connect both devices after connecting:

1. Open your device’s setting app.
2. Click on the connected device shown on the screen.
3. Turn Bluetooth on or off.

Benefits of Bluetooth

1. It is cheap.
2. It is easy to install.
3. It facilitates various devices.
4. It is wireless.
5. If a device installs it then it is free to use.

Disadvantages of Bluetooth

1. It can hack.
2. If the cell phone is connecting to someone then it is prone to get a virus.
3. It allows only short-range communication between devices.
4. It can only connect 2 devices at a time.
5. In some situations, this connection may lose.

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