Changes in `menuconfig` options to not compile any host when using hci

examples as no host is required there.

components/bt/Kconfig

@@ -394,6 +394,13 @@ menu "Bluetooth"
             help
                 This option is recommended for BLE only usecases to save on memory
 
+        config BT_CONTROLLER_ONLY
+            bool "Controller Only"
+            help
+                This option is recommended when you want to communicate directly with the
+                controller (without any host) or when you are using any other host stack
+                not supported by Espressif (not mentioned here).
+
     endchoice
 
     menu "Bluedroid Options"

examples/bluetooth/hci/README.md

@@ -1,4 +1,4 @@
-# Bluetooth Examples for Bluedroid host
+# Bluetooth Examples for Host Controller Interface
 
 Note: To use examples in this directory, you need to have Bluetooth enabled in configuration.
 

examples/bluetooth/hci/controller_hci_uart/sdkconfig.defaults

@@ -12,6 +12,7 @@ CONFIG_BTDM_CTRL_BLE_MAX_CONN=9
 CONFIG_BTDM_CTRL_BR_EDR_MAX_ACL_CONN=7
 CONFIG_BTDM_CTRL_BR_EDR_MAX_SYNC_CONN=3
 CONFIG_BT_BLUEDROID_ENABLED=n
+CONFIG_BT_CONTROLLER_ONLY=y
 CONFIG_BT_HCI_UART=y
 CONFIG_BT_HCI_UART_NO_DEFAULT=1
 CONFIG_BT_HCI_UART_BAUDRATE_DEFAULT=921600

examples/bluetooth/hci/controller_vhci_ble_adv/sdkconfig.defaults

@@ -8,3 +8,5 @@ CONFIG_BT_ENABLED=y
 CONFIG_BTDM_CTRL_MODE_BLE_ONLY=y
 CONFIG_BTDM_CTRL_MODE_BR_EDR_ONLY=n
 CONFIG_BTDM_CTRL_MODE_BTDM=n
+CONFIG_BT_BLUEDROID_ENABLED=n
+CONFIG_BT_CONTROLLER_ONLY=y