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Bluetooth Based Engineering Projects Ideas

A Bluetooth technology is a low powered and high speed wireless technology – which is designed to connect Laptops, phones, tabs or other portable equipment together. It is a specification (IEEE 802.15.1) which is used for low-power radio communications to link computers, phones and other network devices over short distances without requiring any wire. Wireless signals transmitted from Bluetooth cover short distances, typically up to 30 feet, i.e.10 meters.

It is achieved by embedding low-cost transceivers into devices. It supports the frequency band of 2.45GHz and can support till 721KBps along with three voice channels. This frequency band has been set aside by international agreement for the use of medical devices (ISM), industrial, rd-compatible with 1.0 devices and scientific.

Bluetooth can connect almost up to “eight devices” simultaneously and each device offers a unique 48 bit address. From the standards of IEEE 802 the connections are made either multipoint or point to point.

History Of Bluetooth

Bluetooth wireless technology is named after a King Harald Blatand and Danish Viking and last name means “Bluetooth” in English. He is credited with uniting Norway and Denmark just as Bluetooth wireless technology is credited with uniting two disparate devices.


The Bluetooth technology started to emerge after the task undertaken by Ericsson Mobile Communications in 1994 when they decided to find an alternative way instead of using cables for communication between mobile phones and other devices. In 1998, the companies Ericsson, Nokia, IBM and Toshiba formed the Bluetooth Special Interest Group and published the 1st version in 1999.

The list of Bluetooth versions:
• Bluetooth v1.0 and v1.0B
• Bluetooth v1.1
• Bluetooth v1.2
• Bluetooth v2.0 + EDR
• Bluetooth v2.1 + EDR
• Bluetooth v3.0 + HS
• Bluetooth v4.0
• Bluetooth v4.1
• Bluetooth v4.2
• Bluetooth v5

Working Principle of Bluetooth

The Bluetooth Network consists of a piconet or Personal Area Network (PAN) which contains a minimum of 2 and a maximum of 8 Bluetooth peer devices. A master is the one which initiates the communication with other devices. The master device guides the traffic and communications link between itself and the slave devices associated with it. A slave device responds to the master device. Slave devices are required to synchronize their transmit/receive timing with respective to the masters. In addition, transmissions by slave devices are governed by the master. The master device initially sends a radio signal asking for a response from the particular slave devices within the range of the addresses. Once the slaves respond and synchronize with their frequency, they clock with the master device.

Are there different kinds of Bluetooth?

There are several kinds and different versions of the core specification of Bluetooth. The most commonly used version today is Bluetooth with low energy and Bluetooth BR/EDR (basic rate/enhanced data rate) functionality. Generally, we find BR/EDR in things like headsets and speakers while the Bluetooth Smart in the newest products on the market like fitness, beacons, small transmitters, bands that send data over Bluetooth and smart home devices.

Applications of Bluetooth

• Cordless Desktop:
1. Mouse
2. Keyboard
3. Printer
4. Speakers
5. PC cordless
• Ultimate headset:
1. Telephones
2. Portable computers
3. Stereos

• Multimedia Transfer:
1. Songs
2. Videos
3. Pictures



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