On device, scanning failed (BT Inspector showed the scan as stopped and found
nothing). The firmware's GAP layer is initialised by the bt service, and ST's
stack disallows raw hci_le_set_scan_* / hci_le_create_connection in that state.
Switch the shared central layer to the GAP procedures: aci_gap_start_
observation_proc / aci_gap_terminate_gap_proc(GAP_OBSERVATION_PROC) for
scanning, and aci_gap_create_connection (+ terminate the direct-connection proc
to cancel) for connecting, with a short settle after stopping observation.
Also surface the raw BLE status code on BT Inspector's scan screen ("err 0xNN")
so any remaining failure is diagnosable on device. Needs the gap command group
exported (BLE_API default is all).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LEaD4ZeAfvWLBUxXp8G11r
andyandClaude Fable 5.1
6fbfef6358