How Bluetooth Pairs & Hops Frequencies
Short-range 2.4 GHz wireless communication using Frequency-Hopping Spread Spectrum.
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Step 11. BLE Advertising
Peripherals broadcast identity on channels 37, 38, 39.
Earbuds broadcast beacon frames advertising their UUID and capabilities.
Step 1 of 4How Bluetooth Pairs & Hops Frequencies
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Bluetooth allows devices like wireless earbuds to talk to your phone over short distances without cables.
Key Takeaways
- ✓Operates in the 2.4 GHz band across distances of roughly 10 meters.
- ✓Frequency Hopping avoids interference from Wi-Fi and microwaves.
- ✓Bluetooth Low Energy (BLE) sips minimal battery power for smartwatches.
Wireless Handshakes at Short Range
When you pop open your wireless earbuds, they connect to your phone in seconds. Bluetooth uses the 2.4 GHz radio frequency (the same band as Wi-Fi and microwave ovens). To avoid jamming and interference, it uses a trick called Frequency Hopping: the transmitter and receiver hop between 79 different mini-channels 1,600 times every second in a synchronized pattern!Interactive Challenge+25 XP