Bluetooth Low Energy

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Bluetooth Low Energy

  • uses the same 2.400–2.4835 GHzGigaHertz (GHz) 10^9 Hz ISM band as classic Bluetooth
  • is NOT backward-compatible with classic Bluetooth (Basic Rate/Enhanced Rate).
  • devices can have either classic Bluetooth, Bluetooth LE or both.
  • BLE uses a simpler, GFSM for modulation / DSSS
  • BLE uses Frequency Hopping

"Bluetooth Smart Ready" means the device can be used with Classic or Low Energy

"Bluetooth Smart" requires a Bluetooth Smart Ready or Bluetooth Smart device to connect.

max transmit power (Bluetooth 4.0): 10 mW max transmit power (Bluetooth 5): 100 mW


Bluetooth LE has 40 allocated RFRadio Frequency channels (numbered 0-39) that are 2 MHzMegaHertz (MHz) 10^6 Hz wide.

3 channels are designated for device advertising.

LE Channel No. Frequency (MHzMegaHertz (MHz) 10^6 Hz)
37 2402
38 2426
39 2480

See Also[edit]


External Links[edit]

Bluetooth Low Energy - Wikipedia