esp-idf/components/bt/Kconfig

menu "Bluetooth"
    visible if IDF_TARGET_ESP32

    config BT_ENABLED
        bool "Bluetooth"
        depends on IDF_TARGET_ESP32
        help
            Select this option to enable Bluetooth and show the submenu with Bluetooth configuration choices.

    menu "Bluetooth controller"
        visible if BT_ENABLED

        choice BTDM_CTRL_MODE
            prompt "Bluetooth controller mode (BR/EDR/BLE/DUALMODE)"
            depends on BT_ENABLED
            help
                Specify the bluetooth controller mode (BR/EDR, BLE or dual mode).

            config BTDM_CTRL_MODE_BLE_ONLY
                bool "BLE Only"

            config BTDM_CTRL_MODE_BR_EDR_ONLY
                bool "BR/EDR Only"

            config BTDM_CTRL_MODE_BTDM
                bool "Bluetooth Dual Mode"

        endchoice

        config BTDM_CTRL_BLE_MAX_CONN
            int "BLE Max Connections"
            depends on BTDM_CTRL_MODE_BLE_ONLY || BTDM_CTRL_MODE_BTDM
            default 3
            range 1 9
            help
                BLE maximum connections of bluetooth controller.
                Each connection uses 1KB static DRAM whenever the BT controller is enabled.

        config BTDM_CTRL_BR_EDR_MAX_ACL_CONN
            int "BR/EDR ACL Max Connections"
            depends on BTDM_CTRL_MODE_BR_EDR_ONLY || BTDM_CTRL_MODE_BTDM
            default 2
            range 1 7
            help
                BR/EDR ACL maximum connections of bluetooth controller.
                Each connection uses 1.2KB static DRAM whenever the BT controller is enabled.

        config BTDM_CTRL_BR_EDR_MAX_SYNC_CONN
            int "BR/EDR Sync(SCO/eSCO) Max Connections"
            depends on BTDM_CTRL_MODE_BR_EDR_ONLY || BTDM_CTRL_MODE_BTDM
            default 0
            range 0 3
            help
                BR/EDR Synchronize maximum connections of bluetooth controller.
                Each connection uses 2KB static DRAM whenever the BT controller is enabled.



        choice BTDM_CTRL_BR_EDR_SCO_DATA_PATH
            prompt "BR/EDR Sync(SCO/eSCO) default data path"
            depends on BTDM_CTRL_MODE_BR_EDR_ONLY || BTDM_CTRL_MODE_BTDM
            default BTDM_CTRL_BR_EDR_SCO_DATA_PATH_PCM
            help
                SCO data path, i.e. HCI or PCM.
                SCO data can be sent/received through HCI synchronous packets, or the data
                can be routed to on-chip PCM module on ESP32. PCM input/output signals can
                be "matrixed" to GPIOs. The default data path can also be set using API
                "esp_bredr_sco_datapath_set"

            config BTDM_CTRL_BR_EDR_SCO_DATA_PATH_HCI
                bool "HCI"
            config BTDM_CTRL_BR_EDR_SCO_DATA_PATH_PCM
                bool "PCM"
        endchoice

        config BTDM_CTRL_BR_EDR_SCO_DATA_PATH_EFF
            int
            default 0 if BTDM_CTRL_BR_EDR_SCO_DATA_PATH_HCI
            default 1 if BTDM_CTRL_BR_EDR_SCO_DATA_PATH_PCM
            default 0

        config BTDM_CTRL_AUTO_LATENCY
            bool "Auto latency"
            depends on BTDM_CTRL_MODE_BTDM
            default n
            help
                BLE auto latency, used to enhance classic BT performance
                while classic BT and BLE are enabled at the same time.

        config BTDM_CTRL_AUTO_LATENCY_EFF
            bool
            default BTDM_CTRL_AUTO_LATENCY if BTDM_CTRL_MODE_BTDM
            default n


        config BTDM_CTRL_BLE_MAX_CONN_EFF
            int
            default BTDM_CTRL_BLE_MAX_CONN if BTDM_CTRL_MODE_BLE_ONLY || BTDM_CTRL_MODE_BTDM
            default 0

        config BTDM_CTRL_BR_EDR_MAX_ACL_CONN_EFF
            int
            default BTDM_CTRL_BR_EDR_MAX_ACL_CONN if BTDM_CTRL_MODE_BR_EDR_ONLY || BTDM_CTRL_MODE_BTDM
            default 0

        config BTDM_CTRL_BR_EDR_MAX_SYNC_CONN_EFF
            int
            default BTDM_CTRL_BR_EDR_MAX_SYNC_CONN if BTDM_CTRL_MODE_BR_EDR_ONLY || BTDM_CTRL_MODE_BTDM
            default 0

        choice BTDM_CTRL_PINNED_TO_CORE_CHOICE
            prompt "The cpu core which bluetooth controller run"
            depends on BT_ENABLED && !FREERTOS_UNICORE
            help
                Specify the cpu core to run bluetooth controller.
                Can not specify no-affinity.

            config BTDM_CTRL_PINNED_TO_CORE_0
                bool "Core 0 (PRO CPU)"
            config BTDM_CTRL_PINNED_TO_CORE_1
                bool "Core 1 (APP CPU)"
                depends on !FREERTOS_UNICORE
        endchoice

        config BTDM_CTRL_PINNED_TO_CORE
            int
            default 0 if BTDM_CTRL_PINNED_TO_CORE_0
            default 1 if BTDM_CTRL_PINNED_TO_CORE_1
            default 0

        choice BTDM_CTRL_HCI_MODE_CHOICE
            prompt "HCI mode"
            depends on BT_ENABLED
            help
                Speicify HCI mode as VHCI or UART(H4)

            config BTDM_CTRL_HCI_MODE_VHCI
                bool "VHCI"
                help
                    Normal option. Mostly, choose this VHCI when bluetooth host run on ESP32, too.

            config BTDM_CTRL_HCI_MODE_UART_H4
                bool "UART(H4)"
                help
                    If use external bluetooth host which run on other hardware and use UART as the HCI interface,
                    choose this option.
        endchoice

        menu "HCI UART(H4) Options"
            visible if BTDM_CTRL_HCI_MODE_UART_H4

            config BT_HCI_UART_NO
                int "UART Number for HCI"
                depends on BTDM_CTRL_HCI_MODE_UART_H4
                range 1 2
                default 1
                help
                    Uart number for HCI. The available uart is UART1 and UART2.

            config BT_HCI_UART_BAUDRATE
                int "UART Baudrate for HCI"
                depends on BTDM_CTRL_HCI_MODE_UART_H4
                range 115200 921600
                default 921600
                help
                    UART Baudrate for HCI. Please use standard baudrate.

        endmenu

        menu "MODEM SLEEP Options"
            visible if BT_ENABLED

            config BTDM_MODEM_SLEEP
                bool "Bluetooth modem sleep"
                depends on BT_ENABLED
                default y
                help
                    Enable/disable bluetooth controller low power mode.

            choice BTDM_MODEM_SLEEP_MODE
                prompt "Bluetooth Modem sleep mode"
                depends on BTDM_MODEM_SLEEP
                help
                    To select which strategy to use for modem sleep

                config BTDM_MODEM_SLEEP_MODE_ORIG
                    bool "ORIG Mode(sleep with low power clock)"
                    help
                        ORIG mode is a bluetooth sleep mode that can be used for dual mode controller. In this mode,
                        bluetooth controller sleeps between BR/EDR frames and BLE events. A low power clock is used to
                        maintain bluetooth reference clock.

                config BTDM_MODEM_SLEEP_MODE_EVED
                    bool "EVED Mode(For internal test only)"
                    help
                        EVED mode is for BLE only and is only for internal test. Do not use it for production. this
                        mode is not compatible with DFS nor light sleep
            endchoice

            choice BTDM_LOW_POWER_CLOCK
                prompt "Bluetooth low power clock"
                depends on BTDM_MODEM_SLEEP_MODE_ORIG
                help
                    Select the low power clock source for bluetooth controller. Bluetooth low power clock is
                    the clock source to maintain time in sleep mode.

                    - "Main crystal" option provides good accuracy and can support Dynamic Frequency Scaling
                      to be used with Bluetooth modem sleep. Light sleep is not supported.
                    - "External 32kHz crystal" option allows user to use a 32.768kHz crystal as Bluetooth low
                      power clock. This option is allowed as long as External 32kHz crystal is configured as
                      the system RTC clock source. This option provides good accuracy and supports Bluetooth
                      modem sleep to be used alongside Dynamic Frequency Scaling or light sleep.

                config BTDM_LPCLK_SEL_MAIN_XTAL
                    bool "Main crystal"
                    help
                        Main crystal can be used as low power clock for bluetooth modem sleep. If this option is
                        selected, bluetooth modem sleep can work under Dynamic Frequency Scaling(DFS) enabled, but
                        cannot work when light sleep is enabled. Main crystal has a good performance in accuracy as
                        the bluetooth low power clock source.

                config BTDM_LPCLK_SEL_EXT_32K_XTAL
                    bool "External 32kHz crystal"
                    depends on ESP32_RTC_CLK_SRC_EXT_CRYS
                    help
                        External 32kHz crystal has a nominal frequency of 32.768kHz and provides good frequency
                        stability. If used as Bluetooth low power clock, External 32kHz can support Bluetooth
                        modem sleep to be used with both DFS and light sleep.
            endchoice

        endmenu

        choice BTDM_BLE_SLEEP_CLOCK_ACCURACY
            prompt "BLE Sleep Clock Accuracy"
            depends on BTDM_CTRL_MODE_BLE_ONLY || BTDM_CTRL_MODE_BTDM
            default BTDM_BLE_DEFAULT_SCA_250PPM
            help
                BLE Sleep Clock Accuracy(SCA) for the local device is used to estimate window widening in BLE
                connection events. With a lower level of clock accuracy(e.g. 500ppm over 250ppm), the slave
                needs a larger RX window to synchronize with master in each anchor point, thus resulting in an
                increase of power consumption but a higher level of robustness in keeping connected. According
                to the requirements of Bluetooth Core specification 4.2, the worst-case accuracy of Classic
                Bluetooth low power oscialltor(LPO) is +/-250ppm in STANDBY and in low power modes such as
                sniff. For BLE the worst-case SCA is +/-500ppm.

                - "151ppm to 250ppm" option is the default value for Bluetooth Dual mode
                - "251ppm to 500ppm" option can be used in BLE only mode when using external 32kHz crystal as
                   low power clock. This option is provided in case that BLE sleep clock has a lower level of
                   accuracy, or other error sources contribute to the inaccurate timing during sleep.

            config BTDM_BLE_DEFAULT_SCA_500PPM
                bool "251ppm to 500ppm"
                depends on BTDM_LPCLK_SEL_EXT_32K_XTAL && BTDM_CTRL_MODE_BLE_ONLY
            config BTDM_BLE_DEFAULT_SCA_250PPM
                bool "151ppm to 250ppm"
        endchoice
        config BTDM_BLE_SLEEP_CLOCK_ACCURACY_INDEX_EFF
            int
            default 0 if BTDM_BLE_DEFAULT_SCA_500PPM
            default 1 if BTDM_BLE_DEFAULT_SCA_250PPM
            default 1

        config BTDM_BLE_SCAN_DUPL
            bool "BLE Scan Duplicate Options"
            depends on (BTDM_CTRL_MODE_BTDM || BTDM_CTRL_MODE_BLE_ONLY)
            default y
            help
                This select enables parameters setting of BLE scan duplicate.

        choice BTDM_SCAN_DUPL_TYPE
            prompt "Scan Duplicate Type"
            default BTDM_SCAN_DUPL_TYPE_DEVICE
            depends on BTDM_BLE_SCAN_DUPL
            help
                Scan duplicate have three ways. one is "Scan Duplicate By Device Address", This way is to use
                advertiser address filtering. The adv packet of the same address is only allowed to be reported once.
                Another way is "Scan Duplicate By Device Address And Advertising Data". This way is to use advertising
                data and device address filtering. All different adv packets with the same address are allowed to be
                reported. The last way is "Scan Duplicate By Advertising Data". This way is to use advertising data
                filtering. All same advertising data only allow to be reported once even though they are from
                different devices.

            config BTDM_SCAN_DUPL_TYPE_DEVICE
                bool "Scan Duplicate By Device Address"
                help
                    This way is to use advertiser address filtering. The adv packet of the same address is only
                    allowed to be reported once

            config BTDM_SCAN_DUPL_TYPE_DATA
                bool "Scan Duplicate By Advertising Data"
                help
                    This way is to use advertising data filtering. All same advertising data only allow to be reported
                    once even though they are from different devices.

            config BTDM_SCAN_DUPL_TYPE_DATA_DEVICE
                bool "Scan Duplicate By Device Address And Advertising Data"
                help
                    This way is to use advertising data and device address filtering. All different adv packets with
                    the same address are allowed to be reported.
        endchoice

        config BTDM_SCAN_DUPL_TYPE
            int
            depends on BTDM_BLE_SCAN_DUPL
            default 0 if BTDM_SCAN_DUPL_TYPE_DEVICE
            default 1 if BTDM_SCAN_DUPL_TYPE_DATA
            default 2 if BTDM_SCAN_DUPL_TYPE_DATA_DEVICE
            default 0

        config BTDM_SCAN_DUPL_CACHE_SIZE
            int "Maximum number of devices in scan duplicate filter"
            depends on BTDM_BLE_SCAN_DUPL
            range 10 1000
            default 200
            help
                Maximum number of devices which can be recorded in scan duplicate filter.
                When the maximum amount of device in the filter is reached, the cache will be refreshed.

        config BTDM_BLE_MESH_SCAN_DUPL_EN
            bool "Special duplicate scan mechanism for BLE Mesh scan"
            depends on BTDM_BLE_SCAN_DUPL
            default n
            help
                This enables the BLE scan duplicate for special BLE Mesh scan.

        config BTDM_MESH_DUPL_SCAN_CACHE_SIZE
            int "Maximum number of Mesh adv packets in scan duplicate filter"
            depends on BTDM_BLE_MESH_SCAN_DUPL_EN
            range 10 1000
            default 200
            help
                Maximum number of adv packets which can be recorded in duplicate scan cache for BLE Mesh.
                When the maximum amount of device in the filter is reached, the cache will be refreshed.

        config BTDM_CTRL_FULL_SCAN_SUPPORTED
            bool "BLE full scan feature supported"
            depends on BTDM_CONTROLLER_MODE_BLE_ONLY || BTDM_CONTROLLER_MODE_BTDM
            default y
            help
                The full scan function is mainly used to provide BLE scan performance.
                This is required for scenes with high scan performance requirements, such as BLE Mesh scenes.

        config BTDM_BLE_ADV_REPORT_FLOW_CTRL_SUPP
            bool "BLE adv report flow control supported"
            depends on (BTDM_CTRL_MODE_BTDM || BTDM_CTRL_MODE_BLE_ONLY)
            default y
            help
                The function is mainly used to enable flow control for advertising reports. When it is enabled,
                advertising reports will be discarded by the controller if the number of unprocessed advertising
                reports exceeds the size of BLE adv report flow control.

        config BTDM_BLE_ADV_REPORT_FLOW_CTRL_NUM
            int "BLE adv report flow control number"
            depends on BTDM_BLE_ADV_REPORT_FLOW_CTRL_SUPP
            range 50 1000
            default 100
            help
                The number of unprocessed advertising report that Bluedroid can save.If you set
                `BTDM_BLE_ADV_REPORT_FLOW_CTRL_NUM` to a small value, this may cause adv packets lost.
                If you set `BTDM_BLE_ADV_REPORT_FLOW_CTRL_NUM` to a large value, Bluedroid may cache a
                lot of adv packets and this may cause system memory run out. For example, if you set
                it to 50, the maximum memory consumed by host is 35 * 50 bytes. Please set
                `BTDM_BLE_ADV_REPORT_FLOW_CTRL_NUM` according to your system free memory and handle adv
                packets as fast as possible, otherwise it will cause adv packets lost.

        config BTDM_BLE_ADV_REPORT_DISCARD_THRSHOLD
            int "BLE adv lost event threshold value"
            depends on BTDM_BLE_ADV_REPORT_FLOW_CTRL_SUPP
            range 1 1000
            default 20
            help
                When adv report flow control is enabled, The ADV lost event will be generated when the number
                of ADV packets lost in the controller reaches this threshold. It is better to set a larger value.
                If you set `BTDM_BLE_ADV_REPORT_DISCARD_THRSHOLD` to a small value or printf every adv lost event, it
                may cause adv packets lost more.

        menuconfig BTDM_COEX_BT_OPTIONS
            bool "Coexistence Bluetooth Side Options"
            depends on ESP32_WIFI_SW_COEXIST_ENABLE
            default n
            help
                Options of Bluetooth Side of WiFi and bluetooth coexistence.

        config BTDM_COEX_BLE_ADV_HIGH_PRIORITY
            bool "Improve BLE ADV priority for WiFi & BLE coexistence"
            depends on BTDM_COEX_BT_OPTIONS
            default n
            help
                Improve BLE ADV coexistence priority to make it better performance.
                For example, BLE mesh need to enable this option to improve BLE adv performance.

    endmenu

    choice BT_HOST
        prompt "Bluetooth Host"
        depends on BT_ENABLED && BTDM_CTRL_HCI_MODE_VHCI
        default BT_BLUEDROID_ENABLED
        help
            This helps to choose Bluetooth host stack

        config BT_BLUEDROID_ENABLED
            bool "Bluedroid - Dual-mode"
            help
                This option is recommended for classic Bluetooth or for dual-mode
                usecases

        config BT_NIMBLE_ENABLED
            bool "NimBLE - BLE only"
            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"
        visible if BT_BLUEDROID_ENABLED

        source "$IDF_PATH/components/bt/host/bluedroid/Kconfig.in"
    endmenu
    menu "NimBLE Options"
        visible if BT_NIMBLE_ENABLED

        source "$IDF_PATH/components/bt/host/nimble/Kconfig.in"
    endmenu

endmenu

menuconfig BLE_MESH
    bool "ESP BLE Mesh Support"
    depends on BT_ENABLED
    help
        This option enables ESP BLE Mesh support. The specific features that are
        available may depend on other features that have been enabled in the
        stack, such as Bluetooth Support, Bluedroid Support & GATT support.

source "$IDF_PATH/components/bt/esp_ble_mesh/Kconfig.in"