41
Characteristic
Bluetooth BR/EDR
Bluetooth Low Energy
Prior to 4.1
4.1 onwards
Prior to 4.2
4.2 onwards
RF Physical Channels
79 channels with 1 MHz
channel spacing
40 channels with 2 MHz
channel spacing
Discovery / Connect
Inquiry / Paging
Advertising
Number of Piconet
Slaves
7 (active) / 255 (total)
Unlimited
Device Address
Privacy
None
Private device addressing
available
Max Data Rate
1-3 Mbps
1 Mbps via GFSK modulation
Pairing Algorithm
Prior to 2.1:
E21/E22/
SAFER+
P-256 Elliptic
Curve, HMAC-
SHA-256
AES-128
P-256 Elliptic
Curve, AES-
CMAC
2.1-4.0: P-192
Elliptic Curve
9
,
HMAC-
SHA-256
Device Authentication
Algorithm
E1 / SAFER
HMAC-
SHA-256
AES-CCM
10
Encryption Algorithm
E0 / SAFER+
AES-CCM
AES-CCM
Typical Range
30m
50m
Max Output Power
100 mW (20dBm)
10 mW (10dBm)
11
