esp-idf/components/bt/controller/esp32c2/Kconfig.in

menu "HCI Config"

    choice BT_LE_HCI_INTERFACE
        prompt "Select HCI interface"
        default BT_LE_HCI_INTERFACE_USE_RAM

        config BT_LE_HCI_INTERFACE_USE_RAM
            bool "ram"
            help
                Use RAM as HCI interface
        config BT_LE_HCI_INTERFACE_USE_UART
            bool "uart"
            help
                Use UART as HCI interface
    endchoice

    config BT_LE_HCI_UART_PORT
        int "HCI UART port"
        depends on BT_LE_HCI_INTERFACE_USE_UART
        default 1
        help
            Set the port number of HCI UART

    config BT_LE_HCI_UART_FLOWCTRL
        bool "HCI uart Hardware Flow ctrl"
        depends on BT_LE_HCI_INTERFACE_USE_UART
        default n

    config BT_LE_HCI_UART_TX_PIN
        int "HCI uart Tx gpio"
        depends on BT_LE_HCI_INTERFACE_USE_UART
        default 19

    config BT_LE_HCI_UART_RX_PIN
        int "HCI uart Rx gpio"
        depends on BT_LE_HCI_INTERFACE_USE_UART
        default 10

    config BT_LE_HCI_UART_RTS_PIN
        int "HCI uart RTS gpio"
        depends on BT_LE_HCI_UART_FLOWCTRL
        default 4

    config BT_LE_HCI_UART_CTS_PIN
        int "HCI uart CTS gpio"
        depends on BT_LE_HCI_UART_FLOWCTRL
        default 5

    config BT_LE_HCI_UART_BAUD
        int "HCI uart baudrate"
        depends on BT_LE_HCI_INTERFACE_USE_UART
        default 921600
        help
            HCI uart baud rate 115200 ~ 1000000

    choice BT_LE_HCI_UART_PARITY
        prompt "select uart parity"
        depends on BT_LE_HCI_INTERFACE_USE_UART
        default BT_LE_HCI_UART_UART_PARITY_DISABLE

        config BT_LE_HCI_UART_UART_PARITY_DISABLE
            bool "PARITY_DISABLE"
            help
                UART_PARITY_DISABLE
        config BT_LE_HCI_UART_UART_PARITY_EVEN
            bool "PARITY_EVEN"
            help
                UART_PARITY_EVEN
        config BT_LE_HCI_UART_UART_PARITY_ODD
            bool "PARITY_ODD"
            help
                UART_PARITY_ODD
    endchoice

    config BT_LE_HCI_UART_TASK_STACK_SIZE
        int "HCI uart task stack size"
        depends on BT_LE_HCI_INTERFACE_USE_UART
        default 1000
        help
            Set the size of uart task stack
endmenu

config BT_LE_CONTROLLER_NPL_OS_PORTING_SUPPORT
    bool
    default y
    help
        Enable NPL porting for controller.


menuconfig BT_LE_50_FEATURE_SUPPORT
    bool "Enable BLE 5 feature"
    depends on !BT_NIMBLE_ENABLED
    default y
    help
        Enable BLE 5 feature

config BT_LE_LL_CFG_FEAT_LE_2M_PHY
    bool "Enable 2M Phy"
    depends on BT_LE_50_FEATURE_SUPPORT
    default y
    help
        Enable 2M-PHY

config BT_LE_LL_CFG_FEAT_LE_CODED_PHY
    bool "Enable coded Phy"
    depends on BT_LE_50_FEATURE_SUPPORT
    default y
    help
        Enable coded-PHY

config BT_LE_EXT_ADV
    bool "Enable extended advertising"
    depends on BT_LE_50_FEATURE_SUPPORT
    default y
    help
        Enable this option to do extended advertising. Extended advertising
        will be supported from BLE 5.0 onwards.

if BT_LE_EXT_ADV
    config BT_LE_MAX_EXT_ADV_INSTANCES
        int "Maximum number of extended advertising instances."
        range 0 4
        default 1
        depends on BT_LE_EXT_ADV
        help
            Change this option to set maximum number of extended advertising
            instances. Minimum there is always one instance of
            advertising. Enter how many more advertising instances you
            want.
            Each extended advertising instance will take about 0.5k DRAM.

    config BT_LE_EXT_ADV_MAX_SIZE
        int "Maximum length of the advertising data."
        range 0 1650
        default 1650
        depends on BT_LE_EXT_ADV
        help
            Defines the length of the extended adv data. The value should not
            exceed 1650.

    config BT_LE_ENABLE_PERIODIC_ADV
        bool "Enable periodic advertisement."
        default y
        depends on BT_LE_EXT_ADV
        help
            Enable this option to start periodic advertisement.

    config BT_LE_PERIODIC_ADV_SYNC_TRANSFER
        bool "Enable Transer Sync Events"
        depends on BT_LE_ENABLE_PERIODIC_ADV
        default y
        help
            This enables controller transfer periodic sync events to host

endif

config BT_LE_MAX_PERIODIC_SYNCS
    int "Maximum number of periodic advertising syncs"
    depends on BT_LE_50_FEATURE_SUPPORT && !BT_NIMBLE_ENABLED

    range 0 3
    default 1 if BT_LE_ENABLE_PERIODIC_ADV
    default 0
    help
        Set this option to set the upper limit for number of periodic sync
        connections. This should be less than maximum connections allowed by
        controller.

config BT_LE_MAX_PERIODIC_ADVERTISER_LIST
    int "Maximum number of periodic advertiser list"
    depends on BT_LE_50_FEATURE_SUPPORT && !BT_NIMBLE_ENABLED
    range 1 5
    default 5
    help
        Set this option to set the upper limit for number of periodic advertiser list.

menu "Memory Settings"
    depends on !BT_NIMBLE_ENABLED

    config BT_LE_MSYS_1_BLOCK_COUNT
        int "MSYS_1 Block Count"
        default 12
        help
            MSYS is a system level mbuf registry. For prepare write & prepare
            responses MBUFs are allocated out of msys_1 pool. For NIMBLE_MESH
            enabled cases, this block count is increased by 8 than user defined
            count.

    config BT_LE_MSYS_1_BLOCK_SIZE
        int "MSYS_1 Block Size"
        default 256
        help
            Dynamic memory size of block 1

    config BT_LE_MSYS_2_BLOCK_COUNT
        int "MSYS_2 Block Count"
        default 24
        help
            Dynamic memory count

    config BT_LE_MSYS_2_BLOCK_SIZE
        int "MSYS_2 Block Size"
        default 320
        help
            Dynamic memory size of block 2

    config BT_LE_ACL_BUF_COUNT
        int "ACL Buffer count"
        default 24
        help
            The number of ACL data buffers.

    config BT_LE_ACL_BUF_SIZE
        int "ACL Buffer size"
        default 255
        help
            This is the maximum size of the data portion of HCI ACL data packets.
            It does not include the HCI data header (of 4 bytes)

    config BT_LE_HCI_EVT_BUF_SIZE
        int "HCI Event Buffer size"
        default 257 if BT_LE_EXT_ADV
        default 70
        help
            This is the size of each HCI event buffer in bytes. In case of
            extended advertising, packets can be fragmented. 257 bytes is the
            maximum size of a packet.

    config BT_LE_HCI_EVT_HI_BUF_COUNT
        int "High Priority HCI Event Buffer count"
        default 30
        help
            This is the high priority HCI events' buffer size. High-priority
            event buffers are for everything except advertising reports. If there
            are no free high-priority event buffers then host will try to allocate a
            low-priority buffer instead

    config BT_LE_HCI_EVT_LO_BUF_COUNT
        int "Low Priority HCI Event Buffer count"
        default 8
        help
            This is the low priority HCI events' buffer size. Low-priority event
            buffers are only used for advertising reports. If there are no free
            low-priority event buffers, then an incoming advertising report will
            get dropped
endmenu

config BT_LE_CONTROLLER_TASK_STACK_SIZE
    int "Controller task stack size"
    default 5120 if BLE_MESH
    default 4096
    help
        This configures stack size of NimBLE controller task

config BT_LE_LL_RESOLV_LIST_SIZE
    int "BLE LL Resolving list size"
    range 1 5
    default 4
    help
        Configure the size of resolving list used in link layer.

menuconfig BT_LE_SECURITY_ENABLE
    bool "Enable BLE SM feature"
    depends on !BT_NIMBLE_ENABLED
    default y
    help
        Enable BLE sm feature

config BT_LE_SM_LEGACY
    bool "Security manager legacy pairing"
    depends on BT_LE_SECURITY_ENABLE
    default y
    help
        Enable security manager legacy pairing

config BT_LE_SM_SC
    bool "Security manager secure connections (4.2)"
    depends on BT_LE_SECURITY_ENABLE
    default y
    help
        Enable security manager secure connections

config BT_LE_SM_SC_DEBUG_KEYS
    bool "Use predefined public-private key pair"
    default n
    depends on BT_LE_SECURITY_ENABLE && BT_LE_SM_SC
    help
        If this option is enabled, SM uses predefined DH key pair as described
        in Core Specification, Vol. 3, Part H, 2.3.5.6.1. This allows to
        decrypt air traffic easily and thus should only be used for debugging.

config BT_LE_LL_CFG_FEAT_LE_ENCRYPTION
    bool "Enable LE encryption"
    depends on BT_LE_SECURITY_ENABLE
    default y
    help
        Enable encryption connection

config BT_LE_CRYPTO_STACK_MBEDTLS
    bool "Override TinyCrypt with mbedTLS for crypto computations"
    default y
    depends on !BT_NIMBLE_ENABLED
    select MBEDTLS_ECP_RESTARTABLE
    select MBEDTLS_CMAC_C
    help
        Enable this option to choose mbedTLS instead of TinyCrypt for crypto
        computations.

config BT_LE_WHITELIST_SIZE
    int "BLE white list size"
    range 1 15
    default 12
    depends on !BT_NIMBLE_ENABLED

    help
        BLE list size

config BT_LE_LL_DUP_SCAN_LIST_COUNT
    int "BLE duplicate scan list count"
    range 1 100
    default 20
    help
        config the max count of duplicate scan list

config BT_LE_LL_SCA
    int "BLE Sleep clock accuracy"
    range 0 500
    default 60
    help
        Sleep clock accuracy of our device (in ppm)

config BT_LE_MAX_CONNECTIONS
    int "Maximum number of concurrent connections"
    depends on !BT_NIMBLE_ENABLED
    range 1 2
    default 2
    help
        Defines maximum number of concurrent BLE connections. For ESP32, user
        is expected to configure BTDM_CTRL_BLE_MAX_CONN from controller menu
        along with this option. Similarly for ESP32-C3 or ESP32-S3, user is expected to
        configure BT_CTRL_BLE_MAX_ACT from controller menu.
        Each connection will take about 1k DRAM.

choice BT_LE_COEX_PHY_CODED_TX_RX_TLIM
    prompt "Coexistence: limit on MAX Tx/Rx time for coded-PHY connection"
    default BT_LE_COEX_PHY_CODED_TX_RX_TLIM_DIS
    depends on !BT_NIMBLE_ENABLED
    help
        When using PHY-Coded in BLE connection, limitation on max tx/rx time can be applied to
        better avoid dramatic performance deterioration of Wi-Fi.

    config BT_LE_COEX_PHY_CODED_TX_RX_TLIM_EN
        bool "Force Enable"
        help
            Always enable the limitation on max tx/rx time for Coded-PHY connection

    config BT_LE_COEX_PHY_CODED_TX_RX_TLIM_DIS
        bool "Force Disable"
        help
            Disable the limitation on max tx/rx time for Coded-PHY connection
endchoice

config BT_LE_COEX_PHY_CODED_TX_RX_TLIM_EFF
    int
    depends on !BT_NIMBLE_ENABLED
    default 1 if BT_LE_COEX_PHY_CODED_TX_RX_TLIM_EN
    default 0 if BT_LE_COEX_PHY_CODED_TX_RX_TLIM_DIS

config BT_LE_SLEEP_ENABLE
    bool "Enable BLE sleep"
    default n
    help
        Enable BLE sleep

choice BT_LE_WAKEUP_SOURCE
    prompt "BLE light sleep wakeup source"
    depends on BT_LE_SLEEP_ENABLE
    default BT_LE_WAKEUP_SOURCE_BLE_RTC_TIMER
    config BT_LE_WAKEUP_SOURCE_CPU_RTC_TIMER
        bool "Use ESP timer to wakeup CPU"
        help
            Use esp timer to wakeup CPU

    config BT_LE_WAKEUP_SOURCE_BLE_RTC_TIMER
        bool "Use BLE rtc timer to wakeup CPU"
        help
            Use BLE rtc timer to wakeup CPU
endchoice