Bluetooth Low Energy
From Signal Identification Wiki
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
Frequencies[edit]
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 |
