Bluetooth Low Energy

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, GFSKGaussian Frequency-Shift Keying 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

Frequencies

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

Decoding

• Ice9
• Victron Energy Devices
• btlejack

See Also

• Bluetooth

External Links

• Bluetooth Low Energy - Wikipedia