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

Samples[edit]


BLE McDonald's Locator Tents	BLE Android TV settop box
IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis.: File:BLE McDonalds.zip	IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis.: File:BLE AndroidTV.zip

BLE smart bracelet:

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