esp-idf/components/bt/host/nimble/Kconfig.in

choice BT_NIMBLE_MEM_ALLOC_MODE
    prompt "Memory allocation strategy"
    default BT_NIMBLE_MEM_ALLOC_MODE_INTERNAL
    help
        Allocation strategy for NimBLE host stack, essentially provides ability to
        allocate all required dynamic allocations from,

        - Internal DRAM memory only
        - External SPIRAM memory only
        - Either internal or external memory based on default malloc()
          behavior in ESP-IDF
        - Internal IRAM memory wherever applicable else internal DRAM

    config BT_NIMBLE_MEM_ALLOC_MODE_INTERNAL
        bool "Internal memory"

    config BT_NIMBLE_MEM_ALLOC_MODE_EXTERNAL
        bool "External SPIRAM"
        depends on SPIRAM_USE_CAPS_ALLOC || SPIRAM_USE_MALLOC

    config BT_NIMBLE_MEM_ALLOC_MODE_DEFAULT
        bool "Default alloc mode"

    config BT_NIMBLE_MEM_ALLOC_MODE_IRAM_8BIT
        bool "Internal IRAM"
        depends on ESP32_IRAM_AS_8BIT_ACCESSIBLE_MEMORY
        help
            Allows to use IRAM memory region as 8bit accessible region.

            Every unaligned (8bit or 16bit) access will result in an exception
            and incur penalty of certain clock cycles per unaligned read/write.

endchoice #BT_NIMBLE_MEM_ALLOC_MODE

choice BT_NIMBLE_LOG_LEVEL
    prompt "NimBLE Host log verbosity"
    depends on BT_NIMBLE_ENABLED
    default BT_NIMBLE_LOG_LEVEL_INFO
    help
        Select NimBLE log level. Please make a note that the selected NimBLE log
        verbosity can not exceed the level set in "Component config --> Log output
        --> Default log verbosity".

    config BT_NIMBLE_LOG_LEVEL_NONE
        bool "No logs"
    config BT_NIMBLE_LOG_LEVEL_ERROR
        bool "Error logs"
    config BT_NIMBLE_LOG_LEVEL_WARNING
        bool "Warning logs"
    config BT_NIMBLE_LOG_LEVEL_INFO
        bool "Info logs"
    config BT_NIMBLE_LOG_LEVEL_DEBUG
        bool "Debug logs"
endchoice #BT_NIMBLE_LOG_LEVEL

config BT_NIMBLE_LOG_LEVEL
    int
    default 0 if BT_NIMBLE_LOG_LEVEL_DEBUG
    default 1 if BT_NIMBLE_LOG_LEVEL_INFO
    default 2 if BT_NIMBLE_LOG_LEVEL_WARNING
    default 3 if BT_NIMBLE_LOG_LEVEL_ERROR
    default 4 if BT_NIMBLE_LOG_LEVEL_NONE

config BT_NIMBLE_MAX_CONNECTIONS
    int "Maximum number of concurrent connections"
    range 1 2 if IDF_TARGET_ESP32C2
    range 1 9
    default 2 if IDF_TARGET_ESP32C2
    default 3
    depends on BT_NIMBLE_ENABLED
    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.
        For ESP32C2, ESP32C6 and ESP32H2, each connection will take about 1k DRAM.

config BT_NIMBLE_MAX_BONDS
    int "Maximum number of bonds to save across reboots"
    default 3
    depends on BT_NIMBLE_ENABLED
    help
        Defines maximum number of bonds to save for peer security and our security

config BT_NIMBLE_MAX_CCCDS
    int "Maximum number of CCC descriptors to save across reboots"
    default 8
    depends on BT_NIMBLE_ENABLED
    help
        Defines maximum number of CCC descriptors to save

config BT_NIMBLE_L2CAP_COC_MAX_NUM
    int "Maximum number of connection oriented channels"
    range 0 9
    depends on BT_NIMBLE_ENABLED
    default 0
    help
        Defines maximum number of BLE Connection Oriented Channels. When set to (0), BLE COC is not compiled in

choice BT_NIMBLE_PINNED_TO_CORE_CHOICE
    prompt "The CPU core on which NimBLE host will run"
    depends on BT_NIMBLE_ENABLED && !FREERTOS_UNICORE
    help
        The CPU core on which NimBLE host will run. You can choose Core 0 or Core 1.
        Cannot specify no-affinity

    config BT_NIMBLE_PINNED_TO_CORE_0
        bool "Core 0 (PRO CPU)"
    config BT_NIMBLE_PINNED_TO_CORE_1
        bool "Core 1 (APP CPU)"
        depends on !FREERTOS_UNICORE
endchoice

config BT_NIMBLE_PINNED_TO_CORE
    int
    depends on BT_NIMBLE_ENABLED
    default 0 if BT_NIMBLE_PINNED_TO_CORE_0
    default 1 if BT_NIMBLE_PINNED_TO_CORE_1
    default 0

config BT_NIMBLE_HOST_TASK_STACK_SIZE
    int "NimBLE Host task stack size"
    depends on BT_NIMBLE_ENABLED
    default 5120 if BLE_MESH
    default 4096
    help
        This configures stack size of NimBLE host task

config BT_NIMBLE_ROLE_CENTRAL
    bool "Enable BLE Central role"
    depends on BT_NIMBLE_ENABLED
    default y
    help
            Enables central role

config BT_NIMBLE_ROLE_PERIPHERAL
    bool "Enable BLE Peripheral role"
    depends on BT_NIMBLE_ENABLED
    default y
    help
            Enable peripheral role

config BT_NIMBLE_ROLE_BROADCASTER
    bool "Enable BLE Broadcaster role"
    depends on BT_NIMBLE_ENABLED
    default y
    help
                Enables broadcaster role

config BT_NIMBLE_ROLE_OBSERVER
    bool "Enable BLE Observer role"
    depends on BT_NIMBLE_ENABLED
    default y
    help
            Enables observer role

config BT_NIMBLE_NVS_PERSIST
    bool "Persist the BLE Bonding keys in NVS"
    depends on BT_NIMBLE_ENABLED
    default n
    help
            Enable this flag to make bonding persistent across device reboots

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

config BT_NIMBLE_SM_LEGACY
    bool "Security manager legacy pairing"
    depends on BT_NIMBLE_SECURITY_ENABLE
    default y
    help
        Enable security manager legacy pairing

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

config BT_NIMBLE_SM_SC_DEBUG_KEYS
    bool "Use predefined public-private key pair"
    default n
    depends on BT_NIMBLE_SECURITY_ENABLE && BT_NIMBLE_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_NIMBLE_LL_CFG_FEAT_LE_ENCRYPTION
    bool "Enable LE encryption"
    depends on BT_NIMBLE_SECURITY_ENABLE && BT_NIMBLE_ENABLED
    default y
    help
            Enable encryption connection

config BT_NIMBLE_DEBUG
    bool "Enable extra runtime asserts and host debugging"
    default n
    depends on BT_NIMBLE_ENABLED
    help
        This enables extra runtime asserts and host debugging

config BT_NIMBLE_SVC_GAP_DEVICE_NAME
    string "BLE GAP default device name"
    depends on BT_NIMBLE_ENABLED
    default "nimble"
    help
        The Device Name characteristic shall contain the name of the device as an UTF-8 string.
        This name can be changed by using API ble_svc_gap_device_name_set()

config BT_NIMBLE_GAP_DEVICE_NAME_MAX_LEN
    int "Maximum length of BLE device name in octets"
    depends on BT_NIMBLE_ENABLED
    default 31
    help
        Device Name characteristic value shall be 0 to 248 octets in length

config BT_NIMBLE_ATT_PREFERRED_MTU
    int "Preferred MTU size in octets"
    depends on BT_NIMBLE_ENABLED
    default 256
    help
        This is the default value of ATT MTU indicated by the device during an ATT MTU exchange.
        This value can be changed using API ble_att_set_preferred_mtu()

config BT_NIMBLE_SVC_GAP_APPEARANCE
    hex "External appearance of the device"
    depends on BT_NIMBLE_ENABLED
    default 0
    help
        Standard BLE GAP Appearance value in HEX format e.g. 0x02C0


menu "Memory Settings"
    config BT_NIMBLE_MSYS_1_BLOCK_COUNT
        int "MSYS_1 Block Count"
        default 24 if SOC_ESP_NIMBLE_CONTROLLER
        default 12 if !SOC_ESP_NIMBLE_CONTROLLER
        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_NIMBLE_MSYS_1_BLOCK_SIZE
        int    "MSYS_1 Block Size"
        default 128 if SOC_ESP_NIMBLE_CONTROLLER
        default 256 if !SOC_ESP_NIMBLE_CONTROLLER
        help
                Dynamic memory size of block 1

    config BT_NIMBLE_MSYS_2_BLOCK_COUNT
        int    "MSYS_2 Block Count"
        default 24
        help
                Dynamic memory count

    config BT_NIMBLE_MSYS_2_BLOCK_SIZE
        int    "MSYS_2 Block Size"
        default 320
        help
                Dynamic memory size of block 2

    config BT_NIMBLE_TRANSPORT_ACL_FROM_LL_COUNT
        int "ACL Buffer count"
        depends on BT_NIMBLE_ENABLED
        default 24
        help
            The number of ACL data buffers allocated for host.

    config BT_NIMBLE_TRANSPORT_ACL_SIZE
        int "Transport ACL Buffer size"
        depends on BT_NIMBLE_ENABLED
        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_NIMBLE_TRANSPORT_EVT_SIZE
        int "Transport Event Buffer size"
        depends on BT_NIMBLE_ENABLED
        default 257 if BT_NIMBLE_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_NIMBLE_TRANSPORT_EVT_COUNT
        int "Transport Event Buffer count"
        depends on BT_NIMBLE_ENABLED
        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_NIMBLE_TRANSPORT_EVT_DISCARD_COUNT
        int "Discardable Transport Event Buffer count"
        depends on BT_NIMBLE_ENABLED
        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_NIMBLE_GATT_MAX_PROCS
    int "Maximum number of GATT client procedures"
    depends on BT_NIMBLE_ENABLED
    default 4
    help
        Maximum number of GATT client procedures that can be executed.

config BT_NIMBLE_HS_FLOW_CTRL
    bool "Enable Host Flow control"
    depends on BT_NIMBLE_ENABLED
    default y if IDF_TARGET_ESP32
    default n
    help
        Enable Host Flow control

config BT_NIMBLE_HS_FLOW_CTRL_ITVL
    int "Host Flow control interval"
    depends on BT_NIMBLE_HS_FLOW_CTRL
    default 1000
    help
        Host flow control interval in msecs

config BT_NIMBLE_HS_FLOW_CTRL_THRESH
    int "Host Flow control threshold"
    depends on BT_NIMBLE_HS_FLOW_CTRL
    default 2
    help
        Host flow control threshold, if the number of free buffers are at or
        below this threshold, send an immediate number-of-completed-packets
        event

config BT_NIMBLE_HS_FLOW_CTRL_TX_ON_DISCONNECT
    bool "Host Flow control on disconnect"
    depends on BT_NIMBLE_HS_FLOW_CTRL
    default y
    help
        Enable this option to send number-of-completed-packets event to
        controller after disconnection

config BT_NIMBLE_RPA_TIMEOUT
    int "RPA timeout in seconds"
    range 1 41400
    depends on BT_NIMBLE_ENABLED
    default 900
    help
        Time interval between RPA address change. This is applicable in case of
        Host based RPA

menuconfig BT_NIMBLE_MESH
    bool "Enable BLE mesh functionality"
    select BT_NIMBLE_SM_SC
    depends on BT_NIMBLE_ENABLED
    default n
    help
        Enable BLE Mesh example present in upstream mynewt-nimble and not maintained by Espressif.

        IDF maintains ESP-BLE-MESH as the official Mesh solution. Please refer to ESP-BLE-MESH guide at:
        `https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/esp-ble-mesh/ble-mesh-index.html`

config BT_NIMBLE_MESH_PROXY
    bool "Enable mesh proxy functionality"
    default n
    depends on BT_NIMBLE_MESH
    help
        Enable proxy. This is automatically set whenever NIMBLE_MESH_PB_GATT or
        NIMBLE_MESH_GATT_PROXY is set


config BT_NIMBLE_MESH_PROV
    bool "Enable BLE mesh provisioning"
    default y
    depends on BT_NIMBLE_MESH
    help
        Enable mesh provisioning

config BT_NIMBLE_MESH_PB_ADV
    bool "Enable mesh provisioning over advertising bearer"
    default y
    depends on BT_NIMBLE_MESH_PROV
    help
        Enable this option to allow the device to be provisioned over
        the advertising bearer


config BT_NIMBLE_MESH_PB_GATT
    bool "Enable mesh provisioning over GATT bearer"
    default y
    select BT_NIMBLE_MESH_PROXY
    depends on BT_NIMBLE_MESH_PROV
    help
        Enable this option to allow the device to be provisioned over the GATT
        bearer

config BT_NIMBLE_MESH_GATT_PROXY
    bool "Enable GATT Proxy functionality"
    default y
    select BT_NIMBLE_MESH_PROXY
    depends on BT_NIMBLE_MESH
    help
        This option enables support for the Mesh GATT Proxy Service,
        i.e. the ability to act as a proxy between a Mesh GATT Client
        and a Mesh network

config BT_NIMBLE_MESH_RELAY
    bool "Enable mesh relay functionality"
    default n
    depends on BT_NIMBLE_MESH
    help
        Support for acting as a Mesh Relay Node

config BT_NIMBLE_MESH_LOW_POWER
    bool "Enable mesh low power mode"
    default n
    depends on BT_NIMBLE_MESH
    help
        Enable this option to be able to act as a Low Power Node

config BT_NIMBLE_MESH_FRIEND
    bool "Enable mesh friend functionality"
    default n
    depends on BT_NIMBLE_MESH
    help
        Enable this option to be able to act as a Friend Node

config BT_NIMBLE_MESH_DEVICE_NAME
    string "Set mesh device name"
    default "nimble-mesh-node"
    depends on BT_NIMBLE_MESH
    help
        This value defines Bluetooth Mesh device/node name

config BT_NIMBLE_MESH_NODE_COUNT
    int "Set mesh node count"
    default 1
    depends on BT_NIMBLE_MESH
    help
        Defines mesh node count.

config BT_NIMBLE_MESH_PROVISIONER
    bool "Enable BLE mesh provisioner"
    default 0
    depends on BT_NIMBLE_MESH
    help
        Enable mesh provisioner.

config BT_NIMBLE_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_NIMBLE_HS_STOP_TIMEOUT_MS
    int "BLE host stop timeout in msec"
    default 2000
    depends on BT_NIMBLE_ENABLED
    help
        BLE Host stop procedure timeout in milliseconds.

config BT_NIMBLE_HOST_BASED_PRIVACY
    bool "Enable host based privacy for random address."
    default n
    depends on BT_NIMBLE_ENABLED && IDF_TARGET_ESP32
    help
        Use this option to do host based Random Private Address resolution.
        If this option is disabled then controller based privacy is used.

config BT_NIMBLE_ENABLE_CONN_REATTEMPT
    bool "Enable connection reattempts on connection establishment error"
    default y if (IDF_TARGET_ESP32C3 || IDF_TARGET_ESP32S3 || SOC_ESP_NIMBLE_CONTROLLER)
    default n if IDF_TARGET_ESP32
    help
        Enable to make the NimBLE host to reattempt GAP connection on connection
        establishment failure.

config BT_NIMBLE_MAX_CONN_REATTEMPT
    int "Maximum number connection reattempts"
    range 1 7
    default 3
    depends on BT_NIMBLE_ENABLED && BT_NIMBLE_ENABLE_CONN_REATTEMPT
    help
        Defines maximum number of connection reattempts.

menuconfig BT_NIMBLE_50_FEATURE_SUPPORT
    bool "Enable BLE 5 feature"
    depends on BT_NIMBLE_ENABLED && (SOC_BLE_50_SUPPORTED || !BT_CONTROLLER_ENABLED)
    default y
    help
            Enable BLE 5 feature

config BT_NIMBLE_LL_CFG_FEAT_LE_2M_PHY
    bool "Enable 2M Phy"
    depends on BT_NIMBLE_50_FEATURE_SUPPORT
    default y
    help
            Enable 2M-PHY

config BT_NIMBLE_LL_CFG_FEAT_LE_CODED_PHY
    bool "Enable coded Phy"
    depends on BT_NIMBLE_50_FEATURE_SUPPORT
    default y
    help
            Enable coded-PHY

config BT_NIMBLE_EXT_ADV
    bool "Enable extended advertising"
    depends on BT_NIMBLE_50_FEATURE_SUPPORT
    default n
    help
        Enable this option to do extended advertising. Extended advertising
        will be supported from BLE 5.0 onwards.

if BT_NIMBLE_EXT_ADV
    config BT_NIMBLE_MAX_EXT_ADV_INSTANCES
        int "Maximum number of extended advertising instances."
        range 0 4
        default 1 if BT_NIMBLE_EXT_ADV
        default 0
        depends on BT_NIMBLE_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.
            For ESP32C2, ESP32C6 and ESP32H2, each extended advertising instance
            will take about 0.5k DRAM.

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

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

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

config BT_NIMBLE_MAX_PERIODIC_SYNCS
    int "Maximum number of periodic advertising syncs"
    depends on BT_NIMBLE_50_FEATURE_SUPPORT
    range 0 3 if IDF_TARGET_ESP32C2
    range 0 8
    default 1 if BT_NIMBLE_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_NIMBLE_MAX_PERIODIC_ADVERTISER_LIST
    int "Maximum number of periodic advertiser list"
    depends on BT_NIMBLE_50_FEATURE_SUPPORT && SOC_ESP_NIMBLE_CONTROLLER
    range 1 5
    default 5 if BT_NIMBLE_50_FEATURE_SUPPORT
    help
        Set this option to set the upper limit for number of periodic advertiser list.

config BT_NIMBLE_BLE_POWER_CONTROL
    bool "Enable support for BLE Power Control"
    depends on BT_NIMBLE_50_FEATURE_SUPPORT && SOC_BLE_POWER_CONTROL_SUPPORTED
    default n
    help
        Set this option to enable the Power Control feature

choice BT_NIMBLE_COEX_PHY_CODED_TX_RX_TLIM
    prompt "Coexistence: limit on MAX Tx/Rx time for coded-PHY connection"
    default BT_NIMBLE_COEX_PHY_CODED_TX_RX_TLIM_DIS
    depends on ESP_WIFI_SW_COEXIST_ENABLE && 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_NIMBLE_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_NIMBLE_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_NIMBLE_COEX_PHY_CODED_TX_RX_TLIM_EFF
    int
    default 0 if !(ESP_WIFI_SW_COEXIST_ENABLE && BT_NIMBLE_ENABLED)
    default 1 if BT_NIMBLE_COEX_PHY_CODED_TX_RX_TLIM_EN
    default 0 if BT_NIMBLE_COEX_PHY_CODED_TX_RX_TLIM_DIS


config BT_NIMBLE_WHITELIST_SIZE
    int "BLE white list size"
    depends on BT_NIMBLE_ENABLED
    range 1 15
    default 12
    help
            BLE list size

config BT_NIMBLE_TEST_THROUGHPUT_TEST
    bool "Throughput Test Mode enable"
    default n
    help
            Enable the throughput test mode

config BT_NIMBLE_BLUFI_ENABLE
    bool "Enable blufi functionality"
    depends on BT_NIMBLE_ENABLED
    default n
    help
        Set this option to enable blufi functionality.

config BT_NIMBLE_USE_ESP_TIMER
    bool "Enable Esp Timer for Nimble"
    default y
    help
        Set this option to use Esp Timer which has higher priority timer instead of FreeRTOS timer

config BT_NIMBLE_LEGACY_VHCI_ENABLE
    bool
    default y if (IDF_TARGET_ESP32 || IDF_TARGET_ESP32C3 || IDF_TARGET_ESP32S3)
    default n
    help
        This option is used to distinguish whether a previous version of VHCI is being used

config BT_NIMBLE_BLE_GATT_BLOB_TRANSFER
    bool "Blob transfer"
    help
        This option is used when data to be sent is more than 512 bytes. For peripheral role,
        BT_NIMBLE_MSYS_1_BLOCK_COUNT needs to be increased according to the need.