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Working of Bluetooth

Bluetooth is a wireless technology for short-range data exchange using radio waves, typically in the 2.4 GHz band with a range of 10 to 100 meters. It involves pairing devices through scanning and advertising modes, creating a Piconet where one device acts as the master. Bluetooth versions vary in capabilities, with applications in audio, file sharing, IoT, and car systems.

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2 views2 pages

Working of Bluetooth

Bluetooth is a wireless technology for short-range data exchange using radio waves, typically in the 2.4 GHz band with a range of 10 to 100 meters. It involves pairing devices through scanning and advertising modes, creating a Piconet where one device acts as the master. Bluetooth versions vary in capabilities, with applications in audio, file sharing, IoT, and car systems.

Uploaded by

neeajnishad8
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Working of Bluetooth

Bluetooth is a wireless communication technology used to exchange data over short distances using

radio waves. It is commonly used in mobile phones, headphones, laptops, speakers, and many

smart devices.

1. Frequency and Range

- Bluetooth works in the 2.4 GHz ISM band.

- Typical range: 10 meters to 100 meters depending on the version and device class.

2. Pairing Devices

- One device searches (Scanning Mode).

- The other becomes discoverable (Advertising Mode).

- They exchange unique addresses and keys to establish a secure connection.

3. Creating a Piconet

- One device becomes the Master, others are Slaves.

- A group of connected devices is called a Piconet.

- The master controls the communication timing.

4. Data Transmission

- Bluetooth uses Frequency Hopping Spread Spectrum (FHSS), changing frequency 1,600 times per

second.

- Data is sent in small packets using L2CAP (Logical Link Control and Adaptation Protocol).

5. Bluetooth Versions
- Bluetooth 2.0/3.0: Basic data transfer.

- Bluetooth 4.0 (BLE): Low energy use.

- Bluetooth 5.0+: Faster, longer range, used in IoT.

Applications of Bluetooth

- Wireless audio (headphones, speakers)

- File sharing

- Wireless mouse/keyboard

- IoT devices (smart bulbs, fitness trackers)

- Car systems (hands-free calling)

Key Technologies Behind Bluetooth

- Radio Waves: Carry signals between devices

- Frequency Hopping: Avoids interference

- Pairing: Secures the connection

- Piconet: Organizes connected devices

- Encryption: Ensures safe communication

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