Bluetooth LE Link Layer (LL) is a low level protocol for managing advertising, scanning, connecting, flow control, security, and data transportation. There are two types of packets in LL; Advertising packets and Data packets. Link Layer is implemented in a controller very close to the hardware.
Used specifications
Specification
Title
Notes
Bluetooth Core Specification Version 5.2
Vol 3, Part A Logical Link Control and Adaptation Protocol Specification
Tool-specific information
Tested messages
Specifications
L2CAP_COMMAND_REJECT_RSP
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_DISCONNECTION_REQ
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_DISCONNECTION_RSP
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_CONNECTION_PARAMETER_UPDATE_REQ
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_CONNECTION_PARAMETER_UPDATE_RSP
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_LE_CREDIT_BASED_CONNECTION_REQ
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_LE_CREDIT_BASED_CONNECTION_RSP
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_FLOW_CONTROL_CREDIT_IND
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_CREDIT_BASED_CONNECTION_REQ
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_CREDIT_BASED_CONNECTION_RSP
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_CREDIT_BASED_RECONFIGURE_REQ
Bluetooth Core Specification Version 5.2 Vol 3, Part A
L2CAP_CREDIT_BASED_RECONFIGURE_RSP
Bluetooth Core Specification Version 5.2 Vol 3, Part A
B-frame
Bluetooth Core Specification Version 5.2 Vol 3, Part A
K-frame
Bluetooth Core Specification Version 5.2 Vol 3, Part A
Supported features
Specification
Notes
LE Credit Based Flow Control mode
Bluetooth Core Specification Version 5.2 Vol 3, Part A
LE only
Enhanced Credit Based Flow Control mode
Bluetooth Core Specification Version 5.2 Vol 3, Part A