Bluetooth: Broadcast Audio Profile Scan Delegator
This document describes how to run the Scan Delegator functionality, Note that in the examples below, some lines of debug have been removed to make this shorter and provide a better overview.
The Scan Delegator may optionally support the periodic advertisements synchronization transfer (PAST) protocol.
The Scan Delegator server typically resides on devices that have inputs or outputs.
It is necessary to have
CONFIG_BT_BAP_SCAN_DELEGATOR_LOG_LEVEL_DBG enabled for using
the Scan Delegator interactively.
The Scan Delegator can currently only set the sync state of a receive state, but does not actually support syncing with periodic advertisements yet.
bap_scan_delegator --help
bap_scan_delegator - Bluetooth BAP Scan Delegator shell commands
Subcommands:
init : Initialize the service and register callbacks
set_past_pref : Set PAST preference <true || false>
sync_pa : Sync to PA <src_id>
term_pa : Terminate PA sync <src_id>
add_src : Add a PA as source <addr> <sid> <broadcast_id>
<enc_state> [bis_sync [metadata]]
add_src_by_pa_sync : Add a PA as source <broadcast_id> <enc_state> [bis_sync
[metadata]]
mod_src : Modify source <src_id> <broadcast_id> <enc_state>
[bis_sync [metadata]]
rem_src : Remove source <src_id>
synced : Set server scan state <src_id> <bis_syncs>
Example Usage
Setup
uart:~$ bt init
uart:~$ bap_scan_delegator init
uart:~$ bt advertise on
Advertising started
Adding a source
uart:~$ bap_scan_delegator add_src 11:22:33:44:55:66 public 0 1234 0
Receive state with ID 0 updated
Adding a source from a PA sync
uart:~$ bt scan on
Found broadcaster with ID 0x681A22 and addr 2C:44:05:82:EB:82 (random) and sid 0x00 (looking for 0x1000000)
uart:~$ bt scan off
uart:~$ bt per-adv-sync-create 2C:44:05:82:EB:82 (random) 0
PA 0x2003e9b0 synced
uart:~$ bap_scan_delegator add_src_by_pa_sync 0x681A22 0
Receive state with ID 0 updated
When connected
Set sync state for a source:
uart:~$ bap_scan_delegator synced 0 1 3 0