Physical Layer: Overview
1.
2.4GHzFree ISM Band 2.
1mbits/sSignaling rate of 3.
GFSK(Gosping shift keying, Gauss frequency shift keying) modulation 4. The maximum transmitting power reaches 4DBM5.
40 xRF Channel 6.
3 xThe broadcast channel is used to: (1). Found
(2). Connection
(3). Broadcast
7.
37 xData channel
Link Layer: Overview
1. Broadcast:can be connected and not connected
2. Scan:Active or passive
3. Slave machine:Connection role
4. Host:Connection role 5.
31 bytesBroadcast payload of 6. The maximum effective size of each package is
27 bytes7. Built-in
AES-128Encryption: CCM:
Count
Password block link
Message Authentication Code
Link layer: Broadcast and scan
Scan interval: 50ms scan window: 25ms
Broadcast channel: 37,38,39 broadcast interval: 20ms
Link Layer: Topological structure
Link Layer: Connection
The optional connection intervals are: 7.5ms to 4s. In the connection event, the data transfer occurs when the connection events occur.
From for notes (Wiz)
Nordic Information: Bluetooth Low Power Introduction (II)
