The Bluetooth System comprises many components, such as drivers, profiles, and client applications. This document provides an overview of where the various components live in the source tree.
src/connectivity/bluetooth/
core/
bt-gap/ # GAP daemon
bt-host/ # bt-host driver and host subsystem
bt-init/ # Bluetooth subsystem launcher
examples/ # various LE API examples
hci/ # bt-hci drivers
lib/ # protocol and rust utility libraries
profiles/ # profile components (A2DP, AVRCP, HID over GATT, etc)
tests/ # integration tests
tools/ # command-line tools and debug components
sdk/fidl/fuchsia.bluetooth.* # public API
topaz/bin/bluetooth_settings/ # Bluetooth Settings UI
topaz/examples/eddystone_agent/ # [Eddystone](https://github.com/google/eddystone)-based trigger
zircon/system/dev/bluetooth/ # bt-transport drivers
See the HCI section of the Bluetooth System document for an explanation of how the drivers, such as bt-transport, bt-hci, and bt-host, relate to each other.
See the Host Bus section of the Bluetooth System document for more detail on bt-host.