除了 SP32 藍牙（Bluetooth）的 GAP（Generic Access Profile）的 API 函數模塊外，還提供了結構件（Structures）、巨集（Marco）、 泛型型別定義（Type Definitions）和枚舉（Enumerations）。
1. Structure：
1.1. struct esp_bt_cod_t：
Class of device.
Public Members
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Description
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uint32_t reserved_2
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undefined
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uint32_t minor
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minor class
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uint32_t major
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major class
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uint32_t service
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service class
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uint32_t reserved_8
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undefined
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1.2. struct esp_bt_gap_dev_prop_t：
Bluetooth Device Property
Descriptor.
Public Members
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Description
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esp_bt_gap_dev_prop_type_t type
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device property type
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int len
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device property value length
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void ﹡val
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device property value
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2. Macros：
Macros
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Description
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ESP_BT_GAP_RSSI_HIGH_THRLD
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RSSI threshold.
High RSSI threshold
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ESP_BT_GAP_RSSI_LOW_THRLD
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Low RSSI threshold
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ESP_BT_GAP_MAX_BDNAME_LEN
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Maximum bytes of Bluetooth device name.
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ESP_BT_GAP_EIR_DATA_LEN
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Maximum size of EIR Significant part.
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ESP_BT_PIN_CODE_LEN
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Max pin code length
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ESP_BT_IO_CAP_OUT
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ESP_BT_IO_CAP_IO
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ESP_BT_IO_CAP_IN
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ESP_BT_IO_CAP_NONE
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ESP_BT_COD_SRVC_BIT_MASK
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Bits of major service class field.
Major service bit mask
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ESP_BT_COD_SRVC_BIT_OFFSET
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Major service bit offset
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ESP_BT_COD_MAJOR_DEV_BIT_MASK
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Bits of major device class field.
Major device bit mask
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ESP_BT_COD_MAJOR_DEV_BIT_OFFSET
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Major device bit offset
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ESP_BT_COD_MINOR_DEV_BIT_MASK
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Bits of minor device class field.
Minor device bit mask
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ESP_BT_COD_MINOR_DEV_BIT_OFFSET
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Minor device bit offset
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ESP_BT_COD_FORMAT_TYPE_BIT_MASK
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Bits of format type.
Format type bit mask
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ESP_BT_COD_FORMAT_TYPE_BIT_OFFSET
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Format type bit offset
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ESP_BT_COD_FORMAT_TYPE_1
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Class of device format type 1
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ESP_BT_GAP_MIN_INQ_LEN
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Minimum and Maximum inquiry length Minimum inquiry
duration, unit is 1.28s
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ESP_BT_GAP_MAX_INQ_LEN
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Maximum inquiry duration, unit is 1.28s
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3. Type Definitions：
Type Definitions
|
Description
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typedef uint8_t esp_bt_pin_code_t[ESP_BT_PIN_CODE_LEN]
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Pin Code (upto 128 bits) MSB is 0
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typedef uint8_t esp_bt_io_cap_t
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combination of the io capability
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typedef void (﹡esp_bt_gap_cb_t)(esp_bt_gap_cb_event_t
event, esp_bt_gap_cb_param_t ﹡param)
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bluetooth GAP callback function type
Parameters
event: : Event type
param: : Pointer to callback parameter
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4. Enumerations：
4.1. enum esp_bt_cod_mode_t：
Bluetooth A2DP connection states.
Enumeration
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Description
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ESP_BT_SET_COD_MAJOR_MINOR
= 0x01
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overwrite major, minor class
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ESP_BT_SET_COD_SERVICE_CLASS
= 0x02
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set the bits in the input, the current bit will remain
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ESP_BT_CLR_COD_SERVICE_CLASS
= 0x04
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clear the bits in the input, others will remain
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ESP_BT_SET_COD_ALL
= 0x08
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overwrite major, minor, set the bits in service class
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ESP_BT_INIT_COD
= 0x0a
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overwrite major, minor, and service class
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4.2. enum esp_bt_scan_mode_t：
Bluetooth A2DP disconnection reason.
Enumeration
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Description
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ESP_BT_SCAN_MODE_NONE = 0
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Neither discoverable nor connectable
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ESP_BT_SCAN_MODE_CONNECTABLE
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Connectable but not discoverable
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ESP_BT_SCAN_MODE_CONNECTABLE_DISCOVERABLE
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both discoverable and connectable
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4.3. enum
esp_bt_gap_dev_prop_type_t：
Bluetooth Device Property type.
Enumeration
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Description
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ESP_BT_GAP_DEV_PROP_BDNAME = 1
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Bluetooth device name, value type is int8_t []
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ESP_BT_GAP_DEV_PROP_COD
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Class of Device, value type is uint32_t
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ESP_BT_GAP_DEV_PROP_RSSI
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Received Signal strength Indication, value type is int8_t,
ranging from -128 to 127
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ESP_BT_GAP_DEV_PROP_EIR
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Extended Inquiry Response, value type is uint8_t []
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4.4. enum esp_bt_eir_type_t：
Extended Inquiry Response data
type.
Enumeration
|
Description
|
ESP_BT_EIR_TYPE_FLAGS = 0x01
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Flag with information such as BR/EDR and LE support
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ESP_BT_EIR_TYPE_INCMPL_16BITS_UUID = 0x02
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Incomplete list of 16-bit service UUIDs
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ESP_BT_EIR_TYPE_CMPL_16BITS_UUID = 0x03
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Complete list of 16-bit service UUIDs
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ESP_BT_EIR_TYPE_INCMPL_32BITS_UUID = 0x04
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Incomplete list of 32-bit service UUIDs
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ESP_BT_EIR_TYPE_CMPL_32BITS_UUID = 0x05
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Complete list of 32-bit service UUIDs
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ESP_BT_EIR_TYPE_INCMPL_128BITS_UUID = 0x06
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Incomplete list of 128-bit service UUIDs
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ESP_BT_EIR_TYPE_CMPL_128BITS_UUID = 0x07
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Complete list of 128-bit service UUIDs
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ESP_BT_EIR_TYPE_SHORT_LOCAL_NAME = 0x08
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Shortened Local Name
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ESP_BT_EIR_TYPE_CMPL_LOCAL_NAME = 0x09
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Complete Local Name
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ESP_BT_EIR_TYPE_TX_POWER_LEVEL = 0x0a
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Tx power level, value is 1 octet ranging from -127 to 127, unit is dBm
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ESP_BT_EIR_TYPE_MANU_SPECIFIC = 0xff
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Manufacturer specific data
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4.5. enum esp_bt_cod_srvc_t：
Major service class field of Class
of Device, mutiple bits can be set.
Enumeration
|
Description
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ESP_BT_COD_SRVC_NONE = 0
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None indicates an invalid value
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ESP_BT_COD_SRVC_LMTD_DISCOVER = 0x1
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Limited Discoverable Mode
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ESP_BT_COD_SRVC_POSITIONING = 0x8
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Positioning (Location identification)
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ESP_BT_COD_SRVC_NETWORKING = 0x10
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Networking, e.g. LAN, Ad hoc
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ESP_BT_COD_SRVC_RENDERING = 0x20
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Rendering, e.g. Printing, Speakers
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ESP_BT_COD_SRVC_CAPTURING = 0x40
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Capturing, e.g. Scanner, Microphone
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ESP_BT_COD_SRVC_OBJ_TRANSFER = 0x80
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Object Transfer, e.g. v-Inbox, v-Folder
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ESP_BT_COD_SRVC_AUDIO = 0x100
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Audio, e.g. Speaker, Microphone, Headset service
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ESP_BT_COD_SRVC_TELEPHONY = 0x200
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Telephony, e.g. Cordless telephony, Modem, Headset service
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ESP_BT_COD_SRVC_INFORMATION = 0x400
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Information, e.g., WEB-server, WAP-server
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4.6. enum esp_bt_pin_type_t：
Enumeration
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Description
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ESP_BT_PIN_TYPE_VARIABLE = 0
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Refer to BTM_PIN_TYPE_VARIABLE
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ESP_BT_PIN_TYPE_FIXED = 1
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Refer to BTM_PIN_TYPE_FIXED
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4.7. enum esp_bt_sp_param_t：
Enumeration
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Description
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ESP_BT_SP_IOCAP_MODE = 0
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Set IO mode
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4.8. enum esp_bt_cod_major_dev_t：
Major device class field of Class
of Device.
Enumeration
|
Description
|
ESP_BT_COD_MAJOR_DEV_MISC = 0
|
Miscellaneous
|
ESP_BT_COD_MAJOR_DEV_COMPUTER = 1
|
Computer
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ESP_BT_COD_MAJOR_DEV_PHONE = 2
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Phone(cellular, cordless, pay phone, modem
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ESP_BT_COD_MAJOR_DEV_LAN_NAP = 3
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LAN, Network Access Point
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ESP_BT_COD_MAJOR_DEV_AV = 4
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Audio/Video(headset, speaker, stereo, video display, VCR
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ESP_BT_COD_MAJOR_DEV_PERIPHERAL = 5
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Peripheral(mouse, joystick, keyboard)
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ESP_BT_COD_MAJOR_DEV_IMAGING = 6
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Imaging(printer, scanner, camera, display
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ESP_BT_COD_MAJOR_DEV_WEARABLE = 7
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Wearable
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ESP_BT_COD_MAJOR_DEV_TOY = 8
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Toy
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ESP_BT_COD_MAJOR_DEV_HEALTH = 9
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Health
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ESP_BT_COD_MAJOR_DEV_UNCATEGORIZED = 31
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Uncategorized: device not specified
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4.9. enum
esp_bt_gap_discovery_state_t：
Bluetooth Device Discovery state
Enumeration
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Description
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ESP_BT_GAP_DISCOVERY_STOPPED
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device discovery stopped
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ESP_BT_GAP_DISCOVERY_STARTED
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device discovery started
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4.10. enum esp_bt_gap_cb_event_t：
BT GAP callback events.
Enumeration
|
Description
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ESP_BT_GAP_DISC_RES_EVT = 0
|
device discovery result event
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ESP_BT_GAP_DISC_STATE_CHANGED_EVT
|
discovery state changed event
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ESP_BT_GAP_RMT_SRVCS_EVT
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get remote services event
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ESP_BT_GAP_RMT_SRVC_REC_EVT
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get remote service record event
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ESP_BT_GAP_AUTH_CMPL_EVT
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AUTH complete event
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ESP_BT_GAP_PIN_REQ_EVT
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Legacy Pairing Pin code request
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ESP_BT_GAP_CFM_REQ_EVT
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Simple Pairing User Confirmation request.
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ESP_BT_GAP_KEY_NOTIF_EVT
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Simple Pairing Passkey Notification
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ESP_BT_GAP_KEY_REQ_EVT
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Simple Pairing Passkey request
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ESP_BT_GAP_READ_RSSI_DELTA_EVT
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read rssi event
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ESP_BT_GAP_EVT_MAX
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4.11. enum esp_bt_inq_mode_t：
Inquiry Mode
Enumeration
|
Description
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ESP_BT_INQ_MODE_GENERAL_INQUIRY
|
General inquiry mode
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ESP_BT_INQ_MODE_LIMITED_INQUIRY
|
Limited inquiry mode
|
5. Unions：
union esp_bt_gap_cb_param_t.
#include
A2DP state callback parameters.
Unions
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Description
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struct
esp_bt_gap_cb_param_t::disc_res_param disc_res
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discovery result parameter struct
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struct
esp_bt_gap_cb_param_t::disc_state_changed_param disc_st_chgt
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discovery state changed parameter struct
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struct
esp_bt_gap_cb_param_t::rmt_srvcs_param rmt_srvcs
|
services of remote device parameter struct
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struct
esp_bt_gap_cb_param_t::rmt_srvc_rec_param rmt_srvc_rec
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specific service record from remote device parameter
struct
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struct
esp_bt_gap_cb_param_t::read_rssi_delta_param read_rssi_delta
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read rssi parameter struct
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struct
esp_bt_gap_cb_param_t::auth_cmpl_param auth_cmpl
|
authentication complete parameter struct
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struct
esp_bt_gap_cb_param_t::pin_req_param pin_req
|
pin request parameter struct
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struct
esp_bt_gap_cb_param_t::cfm_req_param cfm_req
|
confirm request parameter struct
|
struct
esp_bt_gap_cb_param_t::key_notif_param key_notif
|
passkey notif parameter struct
|
struct
esp_bt_gap_cb_param_t::key_req_param key_req
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passkey request parameter struct
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struct
auth_cmpl_param
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#include
ESP_BT_GAP_AUTH_CMPL_EVT.
Public Members
esp_bd_addr_t bda - remote bluetooth device address
esp_bt_status_t stat - authentication complete status
uint8_t device_name[ESP_BT_GAP_MAX_BDNAME_LEN+1]
- device name
|
struct
cfm_req_param
|
#include
ESP_BT_GAP_CFM_REQ_EVT.
Public Members
esp_bd_addr_t bda - remote bluetooth device address
uint32_t num_val - the numeric value for comparison.
|
struct
disc_res_param
|
#include
ESP_BT_GAP_DISC_RES_EVT.
Public Members
esp_bd_addr_t bda - remote bluetooth device address
int num_prop - number of properties got
esp_bt_gap_dev_prop_t ﹡prop - properties discovered from
the new device
|
struct
disc_state_changed_param
|
#include
ESP_BT_GAP_DISC_STATE_CHANGED_EVT.
Public Members
esp_bt_gap_discovery_state_t state - discovery state
|
struct
key_notif_param
|
#include
ESP_BT_GAP_KEY_NOTIF_EVT.
Public Members
esp_bd_addr_t bda - remote bluetooth device address
uint32_t passkey - the numeric value for passkey entry.
|
struct
key_req_param
|
#include
ESP_BT_GAP_KEY_REQ_EVT.
Public Members
esp_bd_addr_t bda - remote bluetooth device address
|
struct
pin_req_param
|
#include
ESP_BT_GAP_PIN_REQ_EVT.
Public Members
esp_bd_addr_t bda - remote bluetooth device address
bool min_16_digit - TRUE if the pin returned must be at
least 16 digits
|
struct read_rssi_delta_param
|
#include
ESP_BT_GAP_READ_RSSI_DELTA_EVT ﹡.
Public Members
esp_bd_addr_t bda - remote bluetooth device address
esp_bt_status_t stat - read rssi status
int8_t rssi_delta - rssi delta value range -128 ~127, The
value zero indicates that the RSSI is inside the Golden Receive Power Range,
the Golden Receive Power Range is from ESP_BT_GAP_RSSI_LOW_THRLD to
ESP_BT_GAP_RSSI_HIGH_THRLD
|
struct
rmt_srvc_rec_param
|
#include
ESP_BT_GAP_RMT_SRVC_REC_EVT.
Public Members
esp_bd_addr_t bda - remote bluetooth device address
esp_bt_status_t stat - service search status
|
struct
rmt_srvcs_param
|
#include
ESP_BT_GAP_RMT_SRVCS_EVT.
Public Members
esp_bd_addr_t bda - remote bluetooth device address
esp_bt_status_t stat - service search status
int num_uuids - number of UUID in uuid_list
esp_bt_uuid_t ﹡uuid_list - list of service UUIDs of remote
device
|
Header File：bt/bluedroid/api/include/api/esp_gap_bt_api.h
參考網址：https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/bluetooth/esp_gap_bt.html
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