This section provides a description of how to use the demo application to connect two configured board and communicate over Bluetooth. The Bluetooth HFP is a simple Client-Server connection process with one side operating in the Audio-Gateway role and the other operating in the Hands-free role. We will setup one of the boards as a Audio-Gateway client (HFPAG Demo acts as Audio gateway) and use an another board as Hands-free server (using HFP Demo). we Will see how to initiate connection and send indications between the two devices over Bluetooth.

Now use the second board and follow the steps as per either HFP Demo when using Tiva or MSP430 as the server or HFPDemo_HF for MSP432 or STM32F4 as the server. Perform the steps prior to running the Audio-Gateway Bluetooth code on the first board. The second device that is connected to the computer will be the Hands-free Server.

1. Perform the steps mentioned earlier in Running the Bluetooth Code section to initialize the application.
2. Give a name for the platform by issuing the SetLocalName. In our example we give it a name of hfpserver.
3. Open a HFPServer by issuing the command, OpenHFServer. Here we use OpenHFServer to open port 1, the default first port.
   Figure 6-1 HFP AG Demo Start Server

1. Perform the steps mentioned earlier in "Running the Bluetooth Code" section to initialize the application.
   Figure 6-2 HFP AG Demo Start Client
2. Issue the Inquiry command for the HFP server.
   Figure 6-3 HFP AG Demo Inquiry
3. Discover servers of the remote HFP server by issuing the ServiceDiscovery 1 12 , command to get the port number.
   Note: The port ID on the remote Hands free device is 0x01 (The Unsigned int), as highlighted in the image below from the Attribute ID 0x0004. This port ID is used in the following OpenAudioGatewayClient command as its second parameter.
   Figure 6-4 HFP AG Demo Discovery
4. Initiate connection to the remote HFP server by isssuing the OpenAudioGatewayClient 1 1 command.
   Figure 6-5 HFP AG Demo Open Audio Gateway

   You will see the output below from the HFP server.

   Figure 6-6 HFP AG Status Indication
5. Sending indications: Issue the RingIndication or SendCallerIdNotification +9198787899889 commands.
   Figure 6-7 HFP AG Demo Ring Indication

   You will see the below output from the HFP server.

   Figure 6-8 HFP AG Demo Ring Indication Server
6. Initiate audio connection/Disconnection and closing the HFP connection by issuing the: ManageAudio <STATE> and CloseAgClient commands.
   Figure 6-9 HFP AG Demo Manage Audio Cycle

   You will see the below output from the HFP server.

   Figure 6-10 HFP AG Demo Server Indications

This demonstrates setting up the client to connect to a commercial headset.

1. Perform the steps mentioned earlier in "Running the Bluetooth Code" section to initialize the application.

   OpenStack().

   Bluetooth Stack ID: 1

   WBS support enabled.

   Device Chipset: Unknown (greater 4.1)

   BTPS Version : 4.2.1.0

   Project Type : 6

   FW Version : 12.12

   App Name : HFPDemo_AG

   App Version : 0.3

   LOCAL BD_ADDR: 0x88C255D1D645

   GAP_Set_Connectability_Mode(cmConnectable).

   GAP_Set_Discoverability_Mode(dmGeneralDiscoverable, 0).

   GAP_Set_Pairability_Mode(pmPairableMode).

   GAP_Register_Remote_Authentication() Success.

   ******************************************************************

   * Command Options: Inquiry, DisplayInquiryList, Pair, *

   * EndPairing, PINCodeResponse, PassKeyResponse, *

   * UserConfirmationResponse, *

   * SetDiscoverabilityMode, SetConnectabilityMode,*

   * SetPairabilityMode, *

   * ChangeSimplePairingParameters, *

   * GetLocalAddress, SetLocalName, GetLocalName, *

   * SetClassOfDevice, GetClassOfDevice, *

   * GetRemoteName, ManageAudio, *

   * OpenAudioGatewayClient, CloseAgClient, *

   * ServiceDiscovery, UpdateControlIndicators, *

   * CallWaiting, SendCallerIdNotification, *

   * SetRingIndication, RingIndication, *

   * SetVoiceRecognitionActivation, *

   * SetSpeakerGain, SetMicroPhoneGain, *

   * DisableRemoteSoundEnhancement, *

   * SendOperatorInfo, SendIncomingCallState, *

   * SendSubNumber, SendCallList, *

   * Help *

   ******************************************************************

2. Issue the Inquiry command for the HFP server.

   HFP AG>Inquiry

   Return Value is 0 GAP_Perform_Inquiry() SUCCESS.

   HFP AG>

   GAP Inquiry Entry Result: 0x244B03F712D3.

   HFP AG>

   GAP Inquiry Entry Result: 0x3402862CCAE9.

   HFP AG>

   GAP Inquiry Entry Result: 0x340286605044.

   HFP AG>

   GAP Inquiry Entry Result: 0x484520902A4E.

   HFP AG>

   GAP Inquiry Entry Result: 0x08DF1F99F8D0.

   HFP AG>

   GAP Inquiry Entry Result: 0x002500F84FAB.

   HFP AG>

   GAP_Inquiry_Result: 6 Found.

   GAP Inquiry Result: 1, 0x244B03F712D3.

   GAP Inquiry Result: 2, 0x3402862CCAE9.

   GAP Inquiry Result: 3, 0x340286605044.

   GAP Inquiry Result: 4, 0x484520902A4E.

   GAP Inquiry Result: 5, 0x08DF1F99F8D0.

   GAP Inquiry Result: 6, 0x002500F84FAB.

3. Discover services of the remote HFP server by issuing the ServiceDiscovery 5 12 , command to get the port number.
   Note: The port ID on the remote Hands free device is 0x0A (The Unsigned int), from the Attribute ID 0x0004. This port ID is used in the following OpenAudioGatewayClient command as its second parameter after being converted to its decimal equivilant (10).

   HFP AG>ServiceDiscovery

   Usage: SERVICEDISCOVERY [Inquiry Index] [Profile Index] [16/32 bit UUID (Manual only)].

   Profile Index:

   1. Manual (MUST specify 16/32 bit UUID)
   2. L2CAP
   3. Advanced Audio
   4. A/V Remote Control
   5. Basic Imaging
   6. Basic Printing
   7. Dial-up Networking
   8. FAX
   9. File Transfer
   10. Hard Copy Cable Repl.
   11. Health Device
   12. Headset
   13. Handsfree
   14. HID
   15. LAN Access
   16. Message Access
   17. Object Push
   18. Personal Area Network
   19. Phonebook Access
   20. SIM Access
   21. Serial Port
   22. IrSYNC

   Function Error.

   HFP AG>ServiceDiscovery 5 12

   SDP_Service_Search_Attribute_Request(Handsfree) Success.

   HFP AG>

   SDP Service Search Attribute Response Received (Size = 0x0010)

   Service Record: 1:

   Attribute ID 0x0000

   Type: Unsigned Int = 0x00010000

   Attribute ID 0x0001

   Type: Data Element Sequence

   Type: UUID_16 = 0x111E

   Type: UUID_16 = 0x1203

   Attribute ID 0x0004

   Type: Data Element Sequence

   Type: Data Element Sequence

   Type: UUID_16 = 0x0100

   Type: Data Element Sequence

   Type: UUID_16 = 0x0003

   Type: Unsigned Int = 0x0A

   Attribute ID 0x0006

   Type: Data Element Sequence

   Type: Unsigned Int = 0x656E

   Type: Unsigned Int = 0x006A

   Type: Unsigned Int = 0x0100

   Attribute ID 0x0009

   Type: Data Element Sequence

   Type: Data Element Sequence

   Type: UUID_16 = 0x111E

   Type: Unsigned Int = 0x0106

   Attribute ID 0x0100

   Type: Text String = Hands-Free unit

   Attribute ID 0x0311

   Type: Unsigned Int = 0x003F

4. Initiate connection to the remote HFP server by isssuing the OpenAudioGatewayClient 5 10 command.

   HFP AG>OpenAudioGatewayClient

   Usage: OPENAUDIOGATEWAYCLIENT [Inquiry Index] [Port Number].

   Function Error.

   HFP AG>OpenAudioGatewayClient 5 10

   Bluetooth Device Address: 0x08DF1F99F8D0

   Open Remote HandsFree Port = 000A

   HFRE_Open_Remote_HandsFree_Port: Function Successful ID = 0001.

   OpenRemoteHandsFreePort: HFRE_Update_Current_Control_Indicator_Status Function Status 0.

   You will see the output below from the HFP server

   HFP AG>

   atLinkKeyRequest: 0x08DF1F99F8D0

   GAP_Authentication_Response() Success.

   HFP AG>

   atPINCodeRequest: 0x08DF1F99F8D0

   Respond with the command: PINCodeResponse

   HFP AG>PINCodeResponse 0000

   PINCodeResponse.

   GAP_Authentication_Response(), Pin Code Response Success.

   HFP AG>

   atLinkKeyCreation: 0x08DF1F99F8D0

   Link Key: 0x4AF49AD7072771919BAC62840F1F985D

   Link Key Stored locally.

   HFP AG>

   HFRE Open Port Confirmation, ID: 0x0001, Status: 0x0000.

   HFP AG>

   HFRE Available Codec List Indiocation, ID: 0x0001 NumCodecs: 2 [ 1 2 ]

   HFP AG>

   HFRE Open Service Level Connection Indication, ID: 0x0001

   RemoteSupportedFeaturesValid: TRUE

   RemoteSupportedFeatures: 0x000000BF

   RemoteCallHoldMultipartySupport: 0x00000000

   HFRE_Enable Call Line Identification

   HFP AG>

   HFRE Disable Sound_Enhancement Indication, ID: 0x0001

   HFRE_Send_Terminating_Response (erOK) :: Res = 0

   HFP AG>HFRE Speaker Gain Indication, ID: 0x0001, Speaker Gain 0x000A.

   HFP AG>HFRE Call Line Identification Notification Activation Indication, ID: 0x0001, Enabled: TRUE.

   HFP AG>HFRE Call Waiting Notification Activation Indication, ID: 0x0001, Enabled: TRUE.

   HFP AG>

   HFRE Response Hold Status Indication, ID: 0x0001

   HFRE_Send_Incoming_Call_State (csNone) :: Res = 0

   HFP AG>

   HFRE_Current_Calls_List_Indication

   HFRE_Send_Terminating_Response (erOK) :: Res = 0

5. Initiate audio connection by issuing the: ManageAudio <STATE> command which, by defaut chooses to uses Modified sub-band coding (MSBC).

   HFP AG>ManageAudio

   Usage: Audio [Release = 0, Setup = 1].

   Function Error.

   HFP AG>ManageAudio 1

   HFRE_Send_Select_Codec:: Codec = 2, Res = 0

   You will see the below output from the HFP server

   HFP AG>

   HFRE Codec Select Confirmation, ID: 0x0001 AcceptedCodec=2

   Setup WBS with Audio for ACL handle 0x0001

   HFRE_Setup_Audio_Connection: Function Successful.

   HFRE_Setup_Audio_Connection:: Res = 0

   HFP AG>

   HFRE Audio Connection Indication, ID: 0x0001, BDADDR=0x08DF1F99F8D0, Status: 0x0000.