fuchsia.bluetooth.control

PROTOCOLS

Control

Defined in fuchsia.bluetooth.control/control.fidl

Primary Bluetooth control service to access bluetooth

IsBluetoothAvailable

Returns whether or not Bluetooth is currently available on the system.

Request

Name	Type

Response

Name	Type
`available`	`bool`

SetPairingDelegate

Registers a delegate to handle pairing requests. Indicate the capability type of the PairingDelegate using in and out. If your input/output capability is variable, call this function when it changes to update. Setting a pairing delegate closes the previously assigned pairing Delegate.

To disable pairing, set delegate to null.

Request

Name	Type
`delegate`	`PairingDelegate?`

Response

Name	Type
`success`	`bool`

GetAdapters

Returns information about all local adapters that are known to the system.

Request

Name	Type

Response

Name	Type
`adapters`	`vector<AdapterInfo>?`

SetActiveAdapter

Sets the local adapter with the given identifier to act as the backing adapter for all Bluetooth interfaces.

Request

Name	Type
`identifier`	`string`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`

GetActiveAdapterInfo

Returns information on the current active adapter, if it exists.

Request

Name	Type

Response

Name	Type
`adapter`	`AdapterInfo?`

RequestDiscovery

If discovery is true, active discovery is requested. When requesting discovery, general discovery for BR/EDR and LE will be active and newly discovered devices will be reported via RemoteDeviceDelegate.OnDeviceUpdate().

Discovery may be active when not reqested. If an error occurs when starting discovery, it is reflected in status.

Request

Name	Type
`discovery`	`bool`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`

GetKnownRemoteDevices

Retrieve the set of known remote devices. Note: These devices are not guaranteed to still be reachable.

Request

Name	Type

Response

Name	Type
`devices`	`vector<RemoteDevice>`

SetName

Sets the public Bluetooth name for this device, or resets to the default name if name is not present.

Request

Name	Type
`name`	`string?`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`

SetDeviceClass

Set the Device Class for the active Bluetooth adapter. Values are defined in https://www.bluetooth.com/specifications/assigned-numbers/baseband

Request

Name	Type
`device_class`	`DeviceClass`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`

SetDiscoverable

Set the discoverability of this device.

Request

Name	Type
`discoverable`	`bool`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`

Connect

Attempt to connect to the remote device_id.

Request

Name	Type
`device_id`	`string`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`

Disconnect

Disconnect a previously-connected device. Note: This does not remove a device bond, see Control::Forget.

Request

Name	Type
`device_id`	`string`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`

Pair

Initiate a pairing to the remote id with the given options. Returns an error variant of fuchsia.bluetooth.Status if no connected peer with id is found or the pairing procedure fails. If already paired, this will do nothing unless the pairing is over LE and the PairingOptions.le_security_level is more secure than the current security level.

Request

Name	Type
`id`	`fuchsia.bluetooth/PeerId`
`options`	`PairingOptions`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`

Forget

Forget device_id completely, removing all bonding information. This will disconnect a device if it is connected.

Request

Name	Type
`device_id`	`string`

Response

Name	Type
`status`	`fuchsia.bluetooth/Status`

SetIOCapabilities

Set local IO Capabilities to use during pairing.

Request

Name	Type
`input`	`InputCapabilityType`
`output`	`OutputCapabilityType`

OnActiveAdapterChanged

Sent when the active adapter has been updated. If active_adapter is null, then no adapter is currently active.

Response

Name	Type
`adapter`	`AdapterInfo?`

OnAdapterUpdated

Sent when an adapter has been updated.

Response

Name	Type
`adapter`	`AdapterInfo`

OnAdapterRemoved

Sent when an adapter with the given identifier has been removed from the system.

Response

Name	Type
`identifier`	`string`

OnDeviceUpdated

Sent when a peer is updated.

Response

Name	Type
`device`	`RemoteDevice`

OnDeviceRemoved

Sent when a peer is removed.

Response

Name	Type
`identifier`	`string`

PairingDelegate

Defined in fuchsia.bluetooth.control/pairing_delegate.fidl

OnPairingRequest

Called for most pairing requests. The delegate must respond with “true” or “false” to either accept or reject the pairing request. If the pairing method requires a passkey this is returned as well.

Any response from this method will be ignored if the OnPairingComplete event has already been sent for device.

Request

Name	Type
`device`	`RemoteDevice`
`method`	`PairingMethod`
`displayed_passkey`	`string?`

Response

Name	Type
`accept`	`bool`
`entered_passkey`	`string?`

OnPairingComplete

Called if the pairing procedure for the device with the given ID is completed. This can be due to successful completion or an error (e.g. due to cancellation by the peer, a timeout, or disconnection) which is indicated by status.

Request

Name	Type
`device_id`	`string`
`status`	`fuchsia.bluetooth/Status`

OnRemoteKeypress

Called to notify keypresses from the peer device during pairing using PairingMethod.PASSKEY_DISPLAY.

This event is used to provide key press events to the delegate for a responsive user experience as the user types the passkey on the peer device. This event will be called once for each key-press.

Request

Name	Type
`device_id`	`string`
`keypress`	`PairingKeypressType`

OnLocalKeypress

The delegate can send this event to notify the peer of local keypresses during pairing using PairingMethod.PASSKEY_ENTRY.

Response

Name	Type
`device_id`	`string`
`keypress`	`PairingKeypressType`

STRUCTS

SecurityProperties

Defined in fuchsia.bluetooth.control/bonding.fidl

Name	Type	Default
`authenticated`	`bool`	No default
`secure_connections`	`bool`	No default
`encryption_key_size`	`uint8`	No default

RemoteKey

Defined in fuchsia.bluetooth.control/bonding.fidl

Name	Type	Description	Default
`security_properties`	`SecurityProperties`		No default
`value`	`uint8[16]`		No default

LocalKey

Defined in fuchsia.bluetooth.control/bonding.fidl

Name	Type	Description	Default
`value`	`uint8[16]`		No default

LTK

Defined in fuchsia.bluetooth.control/bonding.fidl

Name	Type	Default
`key`	`RemoteKey`	No default
`key_size`	`uint8`	No default
`ediv`	`uint16`	No default
`rand`	`uint64`	No default

LEConnectionParameters

Defined in fuchsia.bluetooth.control/bonding.fidl

Name	Type	Default
`connection_interval`	`uint16`	No default
`connection_latency`	`uint16`	No default
`supervision_timeout`	`uint16`	No default

LEData

Defined in fuchsia.bluetooth.control/bonding.fidl

Name	Type	Default
`address`	`string`	No default
`address_type`	`AddressType`	No default
`connection_parameters`	`LEConnectionParameters?`	No default
`services`	`vector<string>`	No default
`ltk`	`LTK?`	No default
`irk`	`RemoteKey?`	No default
`csrk`	`RemoteKey?`	No default

BREDRData

Defined in fuchsia.bluetooth.control/bonding.fidl

Name	Type	Default
`address`	`string`	No default
`piconet_leader`	`bool`	No default
`services`	`vector<string>`	No default
`link_key`	`LTK?`	No default

BondingData

Defined in fuchsia.bluetooth.control/bonding.fidl

Name	Type	Default
`identifier`	`string`	No default
`local_address`	`string`	No default
`name`	`string?`	No default
`le`	`LEData?`	No default
`bredr`	`BREDRData?`	No default

HostData

Defined in fuchsia.bluetooth.control/bonding.fidl

Represents persistent local host data.

Name Type Description Default

Name	Type	Description	Default
`irk`	`LocalKey?`	The local Identity Resolving Key used by a bt-host device to generate Resolvable Private Addresses when privacy is enabled. NOTE: This key is distributed to LE peers during pairing procedures. The client must take care to assign an IRK that consistent with the local bt-host identity.	No default

irk

LocalKey?

The local Identity Resolving Key used by a bt-host device to generate Resolvable Private Addresses when privacy is enabled.

NOTE: This key is distributed to LE peers during pairing procedures. The client must take care to assign an IRK that consistent with the local bt-host identity.

No default

AdapterInfo

Defined in fuchsia.bluetooth.control/control.fidl

Bluetooth controller and its associated host-subsystem state that is present on the current platform.

Name	Type	Description	Default
`identifier`	`string`	UUID that uniquely identifies this adapter on the current system.	No default
`technology`	`TechnologyType`	The Bluetooth technologies that are supported by this adapter.	No default
`address`	`string`	Public Bluetooth device address which can be displayed to the user.	No default
`state`	`AdapterState?`	The current adapter state. This field is only present when an AdapterInfo is obtained via the Control and ControlDelegate interfaces. If present, all optional members of `state` will also be present.	No default

AdapterState

Defined in fuchsia.bluetooth.control/control.fidl

Contains static global information about a local Bluetooth adapter, including its current state. Each adapter instance represents a physical

Name	Type	Default
`local_name`	`string?`	No default
`discoverable`	`fuchsia.bluetooth/Bool?`	No default
`discovering`	`fuchsia.bluetooth/Bool?`	No default
`local_service_uuids`	`vector<string>?`	No default

DeviceClass

Defined in fuchsia.bluetooth.control/control.fidl

Device Class represents the Major and Minor Device Class and Service Class of an adapter Values are defined in https://www.bluetooth.com/specifications/assigned-numbers/baseband

Name	Type	Description	Default
`value`	`uint32`		No default

RemoteDevice

Defined in fuchsia.bluetooth.control/remote_device.fidl

Represents a remote BR/EDR, LE, or dual-mode BR/EDR/LE device.

Name	Type	Description	Default
`identifier`	`string`	Uniquely identifies this device on the current system.	No default
`address`	`string`	Bluetooth device address that identifies this remote device. Clients should display this field to the user when `name` is not available. NOTE: Clients should use the `identifier` field to distinguish between remote devices instead of using their address.	No default
`technology`	`TechnologyType`	The Bluetooth technologies that are supported by this device.	No default
`name`	`string?`	The name of the remote device if present or known.	No default
`appearance`	`Appearance`	The LE appearance property. Present if this is a LE device and the appearance information was obtained over advertising and/or GATT.	No default
`rssi`	`fuchsia.bluetooth/Int8?`	The most recently obtained advertising signal strength for this device.	No default
`tx_power`	`fuchsia.bluetooth/Int8?`	The most recently obtained transmission power for this device.	No default
`connected`	`bool`	Whether or not a BR/EDR and/or LE connection exists between the local adapter and this device.	No default
`bonded`	`bool`	Whether or not a bond exists between the local adapter and this device.	No default
`service_uuids`	`vector<string>`	The list of service UUIDs known to be published on this remote device.	No default

ENUMS

AddressType

Type: uint8

Defined in fuchsia.bluetooth.control/bonding.fidl

Name	Value	Description
`LE_PUBLIC`	`0`
`LE_RANDOM`	`1`
`BREDR`	`2`

InputCapabilityType

Type: uint32

Defined in fuchsia.bluetooth.control/pairing_delegate.fidl

Input and Output Capabilities for pairing exchanges. See Volume 3, Part C, Table 5.3 and 5.4

Name	Value	Description
`NONE`	`0`
`CONFIRMATION`	`1`
`KEYBOARD`	`2`

OutputCapabilityType

Type: uint32

Defined in fuchsia.bluetooth.control/pairing_delegate.fidl

Name	Value	Description
`NONE`	`0`
`DISPLAY`	`1`

PairingMethod

Type: uint32

Defined in fuchsia.bluetooth.control/pairing_delegate.fidl

Different types required by the Security Manager for pairing methods. Bluetooth SIG has different requirements for different device capabilities.

Name	Value	Description
`CONSENT`	`0`	The user is asked to accept or reject pairing.
`PASSKEY_DISPLAY`	`1`	The user is shown a 6-digit numerical passkey which they must enter on the peer device.
`PASSKEY_COMPARISON`	`2`	The user is shown a 6-digit numerical passkey which will also shown on the peer device. The user must compare the passkeys and accept the pairing if the passkeys match.
`PASSKEY_ENTRY`	`3`	The user is asked to enter a 6-digit passkey.

PairingKeypressType

Type: uint32

Defined in fuchsia.bluetooth.control/pairing_delegate.fidl

Name	Value	Description
`DIGIT_ENTERED`	`0`	The user has entered a single digit.
`DIGIT_ERASED`	`1`	The user has erased a single digit.
`PASSKEY_CLEARED`	`2`	The user has cleared the entire passkey.
`PASSKEY_ENTERED`	`3`	The user has finished entering the passkey.

PairingSecurityLevel

Type: uint32

Defined in fuchsia.bluetooth.control/pairing_options.fidl

The security level required for this pairing - corresponds to the security levels defined in the Security Manager Protocol in Vol 3, Part H, Section 2.3.1

Name	Value	Description
`ENCRYPTED`	`1`	Encrypted without MITM protection (unauthenticated)
`AUTHENTICATED`	`2`	Encrypted with MITM protection (authenticated), although this level of security does not fully protect against passive eavesdroppers

Appearance

Type: uint16

Defined in fuchsia.bluetooth.control/remote_device.fidl

Possible values for the LE Appearance property which describes the external appearance of a device at a high level. (See the Bluetooth assigned-numbers document: https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.gap.appearance.xml)

Name	Value	Description
`UNKNOWN`	`0`
`PHONE`	`64`
`COMPUTER`	`128`
`WATCH`	`192`
`WATCH_SPORTS`	`193`
`CLOCK`	`256`
`DISPLAY`	`320`
`REMOTE_CONTROL`	`384`
`EYE_GLASSES`	`448`
`TAG`	`512`
`KEYRING`	`576`
`MEDIA_PLAYER`	`640`
`BARCODE_SCANNER`	`704`
`THERMOMETER`	`768`
`THERMOMETER_EAR`	`769`
`HEART_RATE_SENSOR`	`832`
`HEART_RATE_SENSOR_BELT`	`833`
`BLOOD_PRESSURE`	`896`
`BLOOD_PRESSURE_ARM`	`897`
`BLOOD_PRESSURE_WRIST`	`898`
`HID`	`960`
`HID_KEYBOARD`	`961`
`HID_MOUSE`	`962`
`HID_JOYSTICK`	`963`
`HID_GAMEPAD`	`964`
`HID_DIGITIZER_TABLET`	`965`
`HID_CARD_READER`	`966`
`HID_DIGITAL_PEN`	`967`
`HID_BARCODE_SCANNER`	`968`
`GLUCOSE_METER`	`1024`
`RUNNING_WALKING_SENSOR`	`1088`
`RUNNING_WALKING_SENSOR_IN_SHOE`	`1089`
`RUNNING_WALKING_SENSOR_ON_SHOE`	`1090`
`RUNNING_WALKING_SENSOR_ON_HIP`	`1091`
`CYCLING`	`1152`
`CYCLING_COMPUTER`	`1153`
`CYCLING_SPEED_SENSOR`	`1154`
`CYCLING_CADENCE_SENSOR`	`1155`
`CYCLING_POWER_SENSOR`	`1156`
`CYCLING_SPEED_AND_CADENCE_SENSOR`	`1157`
`PULSE_OXIMETER`	`3136`
`PULSE_OXIMETER_FINGERTIP`	`3137`
`PULSE_OXIMETER_WRIST`	`3138`
`WEIGHT_SCALE`	`3200`
`PERSONAL_MOBILITY`	`3264`
`PERSONAL_MOBILITY_WHEELCHAIR`	`3265`
`PERSONAL_MOBILITY_SCOOTER`	`3266`
`GLUCOSE_MONITOR`	`3328`
`SPORTS_ACTIVITY`	`5184`
`SPORTS_ACTIVITY_LOCATION_DISPLAY`	`5185`
`SPORTS_ACTIVITY_LOCATION_AND_NAV_DISPLAY`	`5186`
`SPORTS_ACTIVITY_LOCATION_POD`	`5187`
`SPORTS_ACTIVITY_LOCATION_AND_NAV_POD`	`5188`

TechnologyType

Type: uint32

Defined in fuchsia.bluetooth.control/remote_device.fidl

Name	Value	Description
`LOW_ENERGY`	`0`
`CLASSIC`	`1`
`DUAL_MODE`	`2`

TABLES

PairingOptions

Defined in fuchsia.bluetooth.control/pairing_options.fidl

Parameters that give a caller more fine-grained control over the pairing process. All of the fields of this table are optional and pairing can still succeed if none of them are set.

Ordinal Name Type Description

le_security_level

PairingSecurityLevel

Only relevant for LE. If present, determines the Security Manager security level to pair with. If not present, defaults to PairingSecurityLevel.AUTHENTICATED.

non_bondable

bool

If not present or false, the pairing will default to bondable mode. Otherwise, setting this parameter to true will initiate a non-bondable pairing.

TODO(fxb/42403): Only implemented for LE transport. Support this for BR/EDR.

transport

TechnologyType

If transport is LOW_ENERGY or CLASSIC, pairing will be performed over the transport corresponding to the specified technology, which must already be connected. If transport is not present or DUAL_MODE, the pairing will be performed over whichever transport is connected, and defaults to LE for dual-mode connections.