Link ID Management

Audio Agent provides an easy way for the user to interact with devices, profiles and other interfaces through Link IDs. A Link ID is an 8-bit hexadecimal value 0xAB. In most cases, the first digit identifies a device and the second digit refers to a profile as described in the tables bellow:

Device field values

Device A	Description
0	Reserved values
1	Device 1
2	Device 2
3	Device 3
…	…

Profile field values

Profile (B)	Description
0	Advanced Audio Distribution Profile (A2DP)
1	Audio/Video Remote Control Profile (AVRCP)
2	Hands-Free Profile (AGHFP), audio gateway
3	Hands-Free Profile (HFP), hand-free device
4	Bluetooth Low Energy (BLE)
5	Serial Port Profile (SPP)
6	Phone Book Access Profile (PBAP)
7	Human Interface Device Profile (HID)
8	Manage Access Profile (MAP)
9	iPod Accessory Protocol (IAP)
A	True Wireless Stereo (TWS)

For example the link ‘24’ refers to the BLE connection with the second device.

In case the device field has a value of zero, the value of the profile field indicates any of the following interfaces:

Reserved values for Profile Field

Profile B	Description
1	Analog Interface
2-F	Reserved for Future Use