Bluetooth is a short-range wireless communication technology used to exchange data between devices over short distances using radio waves in the 2.4 GHz ISM band.
Key Features:
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Range: Typically up to 10 meters (can extend to 100m with Class 1 devices).
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Data Rate: Up to 2-3 Mbps (depending on version).
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Frequency Hopping: Uses Frequency-Hopping Spread Spectrum (FHSS) to reduce interference.
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Low Power: Designed for low energy consumption, ideal for portable and battery-operated devices.
Common Applications:
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Wireless headphones and speakers
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File sharing between smartphones
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Bluetooth keyboards and mice
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Smartwatches and fitness trackers
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Car infotainment systems
Security:
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Includes pairing, authentication, and encryption.
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Bluetooth Low Energy (BLE) adds better power efficiency and security.
Versions:
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Bluetooth 1.0 to 3.0: Basic data transfer.
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Bluetooth 4.0: Introduced Bluetooth Low Energy (BLE).
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Bluetooth 5.0+: Increased range, speed, and support for IoT.
Bluetooth has become a key technology in personal area networking (PAN), making everyday device interactions seamless and wireless.