ATT_ErrorRsp

Opcode:

0xFD01

Command Description:

The Error Response is used to state that a given request cannot be performed and to provide the reason.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

reqOpcode:

The request that generated this error response

Size:

1 byte(s)

Default:

0x01

Range:

Value

Description

0x01

ATT_ERROR_RSP

0x02

ATT_EXCHANGE_MTU_REQ

0x03

ATT_EXCHANGE_MTU_RSP

0x04

ATT_FIND_INFO_REQ

0x05

ATT_FIND_INFO_RSP

0x06

ATT_FIND_BY_TYPE_VALUE_REQ

0x07

ATT_FIND_BY_TYPE_VALUE_RSP

0x08

ATT_READ_BY_TYPE_REQ

0x09

ATT_READ_BY_TYPE_RSP

0x0A

ATT_READ_REQ

0x0B

ATT_READ_RSP

0x0C

ATT_READ_BLOB_REQ

0x0D

ATT_READ_BLOB_RSP

0x0E

ATT_READ_MULTI_REQ

0x0F

ATT_READ_MULTI_RSP

0x10

ATT_READ_BY_GRP_TYPE_REQ

0x11

ATT_READ_BY_GRP_TYPE_RSP

0x12

ATT_WRITE_REQ

0x13

ATT_WRITE_RSP

0x16

ATT_PREPARE_WRITE_REQ

0x17

ATT_PREPARE_WRITE_RSP

0x18

ATT_EXECUTE_WRITE_REQ

0x19

ATT_EXECUTE_WRITE_RSP

0x1B

ATT_HANDLE_VALUE_NOTI

0x1D

ATT_HANDLE_VALUE_IND

0x1E

ATT_HANDLE_VALUE_CFM
handle:

The attribute handle that generated this error response

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value

errorCode:

The reason why the request has generated an error response

Size:

1 byte(s)

Default:

0x80

Range:

Value

Description

0x01

INVALID_HANDLE

0x02

READ_NOT_PERMITTED

0x03

WRITE_NOT_PERMITTED

0x04

INVALID_PDU

0x05

INSUFFICIENT_AUTHEN

0x06

UNSUPPORTED_REQ

0x07

INVALID_OFFSET

0x08

INSUFFICIENT_AUTHOR

0x09

PREPARE_QUEUE_FULL

0x0a

ATTR_NOT_FOUND

0x0b

ATTR_NOT_LONG

0x0c

INSUFFICIENT_KEY_SIZE

0x0d

INVALID_VALUE_SIZE

0x0e

UNLIKELY_ERROR

0x0f

INSUFFICIENT_ENCRYPTION

0x10

UNSUPPORTED_GRP_TYPE

0x11

INSUFFICIENT_RESOURCES

0x80

INVALID_VALUE

Events Generated

This command only returns the CommandStatus event

ATT_ExchangeMTUReq

Opcode:

0xFD02

Command Description:

The Exchange MTU Request is used by the client to inform the server of the clients maximum receive MTU size and request the server to respond with its maximum receive MTU size is used to state that a given request cannot be performed and to provide the reason.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

clientRxMTU:

Attribute client receive MTU size

Size:

2 byte(s)

Default:

23

Range:

Any 2 byte value

Events Generated

The server will respond to this request with a ATT_ExchangeMTURsp.

ATT_ExchangeMTURsp

Opcode:

0xFD03

Command Description:

The Exchange MTU Response is sent in reply to a received Exchange MTU Request.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

serverRxMTU:

Attribute server receive MTU size

Size:

2 byte(s)

Default:

23

Range:

Any 2 byte value

Events Generated

This command only returns the CommandStatus event

ATT_FindInfoReq

Opcode:

0xFD04

Command Description:

The Find Information Request is used to obtain the mapping of attribute handles with their associated types. This allows a client to discover the list of attributes and their types on a server.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

startHandle:

First requested handle number

Size:

2 byte(s)

Default:

0x0001

Range:

Any 2 byte value

endHandle:

Last requested handle number

Size:

2 byte(s)

Default:

0xFFFF

Range:

Any 2 byte value

Events Generated

When this request is received, the server will send the ATT_FindInfoRsp. The client will forward all the Find Information Responses to the calling application. The response with the status of bleProcedureComplete will indicate the end of the sub-procedure. If no attributes will be returned or any of the requested parameters is invalid, the server will send an ATT_ErrorRsp.

ATT_FindInfoRsp

Opcode:

0xFD05

Command Description:

The Find Information Response is sent in reply to a received Find Information Request and contains information about the server.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

format:

The format of the information data

Size:

1 byte(s)

Default:

0x01

Range:

Value

Description

0x01

HANDLE_BT_UUID_TYPE - handle(s) and 16-bit Bluetooth UUID(s)

0x02

HANDLE_UUID_TYPE - handle(s) and 128-bit UUID(s)
info:

The information data whose format is determined by the format field

Size:

input byte(s)

Default:

“”

Range:

4 to (ATT_MTU - 2) octets

Events Generated

This command only returns the CommandStatus event

ATT_FindByTypeValueReq

Opcode:

0xFD06

Command Description:

The Find By Type Value Request is used to obtain the handles of attributes that have a 16-bit UUID attribute type and attribute value. This allows the range of handles associated with a given attribute to be discovered when the attribute type determines the grouping of a set of attributes.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

startHandle:

First requested handle number

Size:

2 byte(s)

Default:

0x0001

Range:

Any 2 byte value

endHandle:

Last requested handle number

Size:

2 byte(s)

Default:

0xFFFF

Range:

Any 2 byte value

type:

2-octet UUID to find

Size:

2 byte(s)

Default:

“00:00”

Range:

Any 2 byte value

value:

Attribute value to find

Size:

input byte(s)

Default:

“”

Range:

0 to (ATT_MTU - 7) octets

Events Generated

When this request is received, the server will send the ATT_FindByTypeValueRsp. The client will forward all the ATT_FindByTypeValueRsp events to the calling application. The response with the status of bleProcedureComplete will indicate the end of the sub-procedure. If no attributes will be returned or any of the requested parameters is invalid, the server will send an ATT_ErrorRsp.

ATT_FindByTypeValueRsp

Opcode:

0xFD07

Command Description:

The Find By Type Value Response is sent in reply to a received Find By Type Value Request and contains information about this server.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

handlesInfo:

The Handles Information List field is a list of one or more Handle Information groups where the first 2 bytes are the attribute handle and the next two bytes are the handle end group handle.

Size:

input byte(s)

Default:

“”

Range:

Any 2-byte value for each element.

Events Generated

This command only returns the CommandStatus event

ATT_ReadByTypeReq

Opcode:

0xFD08

Command Description:

The Read By Type Request is used to obtain the values of attributes where the attribute type is known but the handle is not known.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

startHandle:

First requested handle number

Size:

2 byte(s)

Default:

0x0001

Range:

Any 2 byte value

endHandle:

Last requested handle number

Size:

2 byte(s)

Default:

0xFFFF

Range:

Any 2 byte value

type:

2 or 16 octet UUID

Size:

input byte(s)

Default:

“00:00”

Range:

Any 2 or 16 byte value

Events Generated

When this request is received, the server will send the ATT_ReadByTypeRsp. The client will forward all the ATT_ReadByTypeRsp events to the calling application. The response with the status of bleProcedureComplete will indicate the end of the sub-procedure. If no attribute with the given type exists within the handle range or the attribute value cannot be read, the server will send an ATT_ErrorRsp.

ATT_ReadByTypeRsp

Opcode:

0xFD09

Command Description:

The Read By Type Response is sent in reply to a received Read By Type Request and contains the handles and values of the attributes that have been read.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

length:

The size of each attribute handle-value pair.

Size:

1 byte(s)

Default:

0

Range:

Any 1 byte value

dataList:

A list of Attribute Data (handle-value pairs) where the first two bytes are the attribute handle and the next two bytes are the attribute value.

Size:

input byte(s)

Default:

“”

Range:

Any 2 byte value for each attribute handle and any (length -2) bytes for each attribute value.

Events Generated

This command only returns the CommandStatus event

ATT_ReadReq

Opcode:

0xFD0A

Command Description:

The Read Request is used request the server to read the value of an attribute and return its value in a Read Response.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

handle:

The handle of the attribute to be read

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value.

Events Generated

When this request is received, the server will send the ATT_ReadRsp. If the attribute handle is invalid or the attribute value cannot be read, the server will send an ATT_ErrorRsp.

ATT_ReadRsp

Opcode:

0xFD0B

Command Description:

The Read Response is sent in reply to a received Read Request and contains the value of the attribute that has been read.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

value:

The value of the attribute with the handle given

Size:

input byte(s)

Default:

“”

Range:

Any (0 to (ATT_MTU - 1) byte) value

Events Generated

This command only returns the CommandStatus event

ATT_ReadBlobReq

Opcode:

0xFD0C

Command Description:

The Read Blob Request is used request the server to read part of the value of an attribute at a given offset and return a specific part of the value in a ATT_ReadBlobRsp.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

handle:

The handle of the attribute to be read

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value

offset:

The offset of the first octet to be read

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value

Events Generated

When this request is received, the server will send the ReadBlobRsp. The client will forward all the ReadBlobRsp events to the calling application. The response with the status of bleProcedureComplete will indicate the end of the sub-procedure. If the attribute handle or offset is invalid, or the attribute value cannot be read, the server will send an ATT_ErrorRsp.

ATT_ReadBlobRsp

Opcode:

0xFD0D

Command Description:

The Read Blob Response is sent in reply to a received Read Blob Request and contains part of the value of the attribute that has been read.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

value:

Part of the value of the attribute with the handle given

Size:

input byte(s)

Default:

“”

Range:

Any (0 to (ATT_MTU - 1) octets) value.

Events Generated

This command only returns the CommandStatus event

ATT_ReadMultiReq

Opcode:

0xFD0E

Command Description:

The Read Multiple Request is used to request the server to read two or more values of a set of attributes and return their values in a ATT_ReadMultiRsp. Only values that have a known fixed size can be read, with the exception of the last value that can have a variable length.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

handles:

A set of two or more two-byte attribute handles

Size:

input byte(s)

Default:

“”

Range:

Any (4 to (ATT_MTU-1) byte) value

Events Generated

When this request is received, the server will send the ATT_ReadMultiRsp. If any of the attribute handles are invalid or any of the attribute values cannot be read, the server will send an ATT_ErrorRsp.

ATT_ReadMultiRsp

Opcode:

0xFD0F

Command Description:

The Read Multiple Response is sent in reply to a received ATT_ReadMultiReq and contains the values of the attributes that have been read.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

values:

A set of two or more values

Size:

input byte(s)

Default:

“”

Range:

Any (0 to (ATT_MTU - 1) byte) value.

Events Generated

This command only returns the CommandStatus event

ATT_ReadByGrpTypeReq

Opcode:

0xFD10

Command Description:

The Read By Group Type Request is used to obtain the values of attributes where the attribute type is known, the type of a grouping attribute as defined by a higher layer specification, but the handle is not known.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

startHandle:

First requested handle number

Size:

2 byte(s)

Default:

0x0001

Range:

Any 2 byte value

endHandle:

Last requested handle number

Size:

2 byte(s)

Default:

0xFFFF

Range:

Any 2 byte value

groupType:

2 or 16 octet UUID

Size:

input byte(s)

Default:

“00:00”

Range:

Any 2 or 16 byte value

Events Generated

When this request is received, the server will send the ATT_ReadByGrpTypeRsp. The client will forward all the ATT_ReadByGrpTypeRsp Events to the calling application. The response with the status of bleProcedureComplete will indicate the end of the sub-procedure. If no attributes with the given type exists within the handle ranges or the Attribute Group Type is not a supported grouping attribute, the server will send an ATT_ErrorRsp

ATT_ReadByGrpTypeRsp

Opcode:

0xFD11

Command Description:

The Read By Group Type Response is sent in reply to a received ATT_ReadByGrpTypeReq and contains the handles and values of the attributes that have been read.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

length:

The size of each Attribute Data (attribute handle, end group handle and attribute value set)

Size:

1 byte(s)

Default:

0

Range:

Any 1 byte value.

dataList:

The Attribute Data field is comprised of a list of attribute handle and value pairs where the first two bytes are the attribute handle, the next two bytes are the end group handle, and the next (length - 4) bytes are the attribute value.

Size:

input byte(s)

Default:

“”

Range:

Any value formatted as described above.

Events Generated

This command only returns the CommandStatus event

ATT_WriteReq

Opcode:

0xFD12

Command Description:

The Write Request is used to request the server to write the value of an attribute and acknowledge that this has been achieved in a ATT_WriteRsp. The command field is set for the Write Command. The signature and command fields are set for the Signed Write Command.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

signature:

Whether to include the Authentication Signature with the Write PDU

Size:

1 byte(s)

Default:

0x00

Range:

Value

Description

0x00

No

0x01

Yes
command:

Whether this is the Write Command

Size:

1 byte(s)

Default:

0x00

Range:

Value

Description

0x00

No

0x01

Yes
handle:

The handle of the attribute to be set

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value

value:

The value to be written to the attribute

Size:

input byte(s)

Default:

“”

Range:

Any (0 to (ATT_MTU - 3) byte) value

Events Generated

This command only returns the CommandStatus event

ATT_WriteRsp

Opcode:

0xFD13

Command Description:

The Write Response is sent in reply to a valid Write Request and acknowledges that the attribute has been successfully written.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

Events Generated

This command only returns the CommandStatus event

ATT_PrepareWriteReq

Opcode:

0xFD16

Command Description:

The Prepare Write Request is used to request the server to prepare to write the value of an attribute. The server will respond to this request with a ATT_PrepareWriteRsp, so that the client can verify that the value was received correctly. A client may send more than one ATT_PrepareWriteReq to a server, which will queue and send a response for each handle value pair.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

handle:

The handle of the attribute to be written

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value

offset:

The offset of the first octet to be written

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value

value:

Part of the value of the attribute to be written

Size:

input byte(s)

Default:

“”

Range:

(0 to (ATT_MTU - 5) octets)

Events Generated

When this request is received, the server will send the ATT_PrepareWriteRsp. If the attribute handle is invalid or the attribute value cannot be written, the server will send an ATT_ErrorRsp.

ATT_PrepareWriteRsp

Opcode:

0xFD17

Command Description:

The Prepare Write Response is sent in response to a received Prepare Write Request and acknowledges that the value has been successfully received and placed in the prepare write queue.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

handle:

The handle of the attribute to be written

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value

offset:

The offset of the first octet to be written

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value

value:

Part of the value of the attribute to be written

Size:

input byte(s)

Default:

“”

Range:

Any (0 to (ATT_MTU - 5) byte) value.

Events Generated

This command only returns the CommandStatus event

ATT_ExecuteWriteReq

Opcode:

0xFD18

Command Description:

The Execute Write Request is used to request the server to write or cancel the write of all the prepared values currently held in the prepare queue from this client. This request shall be handled by the server as an atomic operation.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

flags:

Whether to cancel or write.

Size:

1 byte(s)

Default:

0x01

Range:

Value

Description

0x00

CANCEL_WRITES

0x01

WRITE_VALUES

Events Generated

When this request is received, the server will send the ATT_ExecuteWriteRsp. If the attribute value cannot be written, the server will send an ATT_ErrorRsp.

ATT_ExecuteWriteRsp

Opcode:

0xFD19

Command Description:

The Execute Write Response is sent in response to a received Execute Write Request.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

Events Generated

This command only returns the CommandStatus event

ATT_HandleValueNoti

Opcode:

0xFD1B

Command Description:

A server can send a notification of an attributes value at any time.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

authenticated:

Whether or not an authenticated link is required

Size:

1 byte(s)

Default:

0x00

Range:

Value

Description

0x00

No

0x01

Yes
handle:

The handle of the attribute

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value

value:

The current value of the attribute

Size:

input byte(s)

Default:

“”

Range:

Any (0 to (ATT_MTU - 3) byte) value

Events Generated

This command only returns the CommandStatus event

ATT_HandleValueInd

Opcode:

0xFD1D

Command Description:

A server can send an indication of an attributes value at any time.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

authenticated:

Whether or not an authenticated link is required

Size:

1 byte(s)

Default:

0x00

Range:

Value

Description

0x00

No

0x01

Yes
handle:

The handle of the attribute

Size:

2 byte(s)

Default:

0

Range:

Any 2 byte value

value:

The current value of the attribute

Size:

input byte(s)

Default:

“”

Range:

Any (0 to (ATT_MTU - 3) byte) value.

Events Generated

The client shall send a ATT_HandleValueCfm in response to a Handle Value Indication. No further indications to this client shall occur until the confirmation has been received by the server.

ATT_HandleValueCfm

Opcode:

0xFD1E

Command Description:

The Handle Value Confirmation is sent in response to a received ATT_HandleValueInd and confirms that the client has received an indication of the given attribute.

Command Parameters

Connection Handle:

Identifies the connection.

Size:

2 byte(s)

Default:

0x0000

Range:

0x0000 to 0xFFFD

Events Generated

This command only returns the CommandStatus event