This section provides a description of how to use the demo application to connect smart phone over Bluetooth HSP profile, the same for the second smart phone. Bluetooth HSP is a simple Client-Server connection process with one side, the Client, operating in the Audio-Gateway role and the other, the Server, operating in the Handsfree role. We will setup the boards as a Handsfree Server and use an android phone as the Client. Once connected, we can use the STM3240G-EVAL board as headset, with audio connected to the earphone jack.

1. After initialization of the application we need to choose our role, this section will describe the Headset role, issue the Headset command in order to choose this role. After selecting the role you will be able to see the commands for this role.
   Figure 8-2 HSP Demo Headset Role
2. Optional: Give a name for the STM3240G-EVAL board issuing the SetLocalName command. In our example we give it a name of hspserver. The default application name is HSPDemo
   Figure 8-3 HSP Demo Set Name Print
3. Open a HSPServer by isssuing the OpenServer command. Below we use OpenServer to open the port.
   Figure 8-4 HSP Demo Open Server
   Client setup and device discovery
4. Open the bluetooth settings menu on the android phone Settings->Bluetooth. The menu should look similar to the picture below in step 5.
5. Hit on Search for devices. The phone should begin looking for other bluetooth devices.
   Figure 8-5 HSP Demo Bluetooth Settings
6. The Demo device should appear like shown below in the picture with the given name from section b. or the default name HSPDemo. Click on the device name to begin pairing.
   Figure 8-6 HSP Demo Bluetooth Search
7. After the devices are paired (In legacy pairing the Android will prompt for four digits code and then the terminal prompts for PINCodeResponse that should be answered with PINCodeResponse <Four digit code>, the device should show connected on the phone side and print Open Service Level Connection Indication on the terminal .
   Figure 8-7 HSP Demo Bluetooth Connected
   Figure 8-8 HSP Demo Connection
8. To Answer an Incoming Call or hang up an active call use PressButton Command.
   Figure 8-9 HSP Demo Answer Call
   Figure 8-10 HSP Demo Hang up Call
9. To Close the HSPserver, issue the CloseServer <port number> command.
   Figure 8-11 HSP Demo Close Server

1. After initialization of the application on the first board, we need to choose our role, this section will describe the Headset role, issue the Headset command in order to choose this role. After selecting the role you will be able to see the commands for this role.
   Figure 8-12 HSP Demo Headset Role
2. Optional: Give a name for the STM3240G-EVAL board issuing the SetLocalName command. In our example we give it a name of hspserver. The default application name is HSPDemo.
   Figure 8-13 HSP Demo Set Name Print
3. Open a HSPServer by isssuing the OpenServer command. Below we use OpenServer to open the port.
   Figure 8-14 HSP Demo Open Server
   Client setup and device discovery
4. After initialization of the application on the second board, we need to choose our role, this section will describe the Audio Gateway role. Issue the AudioGateway command in order to choose this role. After selecting the role you will be able to see the commands for this role.
   Figure 8-15 HSPD Demo Audio Gateway Audio Role
5. In order to open the Client port, we need to find the device we want to connect to, to do so we issue the Inquiry command to start scanning for nearby devices.
   Figure 8-16 HSP Demo Audio Gateway Display Inquiry
6. After the Inquiry command has finished a list of found devices will be printed to the console. Note that we can retrieve the list again by issuing the DisplayInquiryList command.
7. After we found the device we need to issue the OpenClient command to open the Client port.
   Figure 8-17 HSP Demo Open Client
8. You should receive an HDSET Open Remote Headset Port indication on the Client and Server consoles:
   Figure 8-18 HSP Demo Client Connection

   The Server console also prints out the connected BD_ADDR.

   Figure 8-19 HSP Demo Server Connection
9. You must now ring the Server device in order to begin the audio streaming process. This can be accomplished by issuing the RingIndication command on the Client.
   Figure 8-20 HSP Demo Start Connection
10. The Server will receive a HDSET Ring Indication.
    Figure 8-21 HSP Demo Ring Indication Notification
11. To Answer the Incoming Call or hang up an active call issue the PressButton command from the Server.
    Figure 8-22 HSP Demo Server Press Button
12. The Client will receive both a HDSET Button Pressed and HDSET Audio Connection indications.
    Figure 8-23 HSP Demo Button Pressed Indication
13. To Close the HSPserver, issue the CloseServer <port number> command.

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

1. This section will describe the Audio Gateway role. Issue the AudioGateway command in order to choose this role. After selecting the role you will be able to see the commands for this role.

   OpenStack().
   Stack Initialization on Port 1 115200 (UART) Successful.
   Bluetooth Stack ID: 1
   Device Chipset: 4.1
   BTPS Version  : 4.0.3.0
   Project Type  : 6
   FW Version    : 7.26
   App Name      : HSPDemo
   App Version   : 0.1
   LOCAL BD_ADDR: 0xB0B448F49D74
   GAP_Set_Connectability_Mode(cmConnectable).
   GAP_Set_Discoverability_Mode(dmGeneralDiscoverable, 0).
   GAP_Set_Pairability_Mode(pmPairableMode).
   GAP_Register_Remote_Authentication() Success.
   
   ******************************************************************
   * Command Options: Headset, AudioGateway, Help                   *
   ******************************************************************
   
   Choose Mode>AudioGateway
   
   ******************************************************************
   * Command Options: Inquiry, DisplayInquiryList, Pair,            *
   *                  EndPairing, PINCodeResponse, PassKeyResponse, *
   *                  UserConfirmationResponse,                     *
   *                  SetDiscoverabilityMode, SetConnectabilityMode,*
   *                  SetPairabilityMode,                           *
   *                  ChangeSimplePairingParameters,                *
   *                  GetLocalAddress, GetLocalName, SetLocalName,  *
   *                  GetClassOfDevice, SetClassOfDevice,           *
   *                  GetRemoteName, ServiceDiscovery,              *
   *                  OpenClient, CloseClient,                      *
   *                  RingIndication, ChangeSpeakerGain,            *
   *                  ChangeMicrophoneGain,                         *
   *                  ManageAudio,                                  *
   *                  Help, Quit                                    *
   ******************************************************************
   

2. In order to open the Client port, we need to find the device we want to connect to, to do so we issue the Inquiry command to start scanning for nearby devices.

   AG>Inquiry
   Return Value is 0 GAP_Perform_Inquiry() SUCCESS.
   

3. After the Inquiry command has finished a list of found devices will be printed to the console.
   Note: We can retrieve the list again by issuing the DisplayInquiryList command.

   AG>
   GAP Inquiry Entry Result: 0x244B03F712D3.
   
   AG>
   GAP Inquiry Entry Result: 0x340286605044.
   
   AG>
   GAP Inquiry Entry Result: 0x000DFD4072EF.
   
   AG>
   GAP_Inquiry_Result: 3 Found.
   GAP Inquiry Result: 1, 0x244B03F712D3.
   GAP Inquiry Result: 2, 0x340286605044.
   GAP Inquiry Result: 3, 0x000DFD4072EF.
   

4. You can verify the device you want to connect to by issuing the GetRemoteName <Inquiry Index> command.

   AG>GetRemoteName 3
   GAP_Query_Remote_Device_Name: Function Successful.
   
   AG>
   GAP Remote Name Result: BD_ADDR: 0x000DFD4072EF.
   GAP Remote Name Result: Motorola S10-HD.
   

5. Discover services of the remote HFP server by issuing the ServiceDiscovery 3 11, command to get the port number.
   Note: The port ID on the remote Hands free device is 0x02 (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).

   AG>ServiceDiscovery
   Usage: SERVICEDISCOVERY [Inquiry Index] [Profile Index] [16/32 bit UUID (Manual only)].
   
      Profile Index:
          0) Manual (MUST specify 16/32 bit UUID)
          1) L2CAP
          2) Advanced Audio
          3) A/V Remote Control
          4) Basic Imaging
          5) Basic Printing
          6) Dial-up Networking
          7) FAX
          8) File Transfer
          9) Hard Copy Cable Repl.
         10) Health Device
         11) Headset
         12) Audio gateway
         13) HID
         14) LAN Access
         15) Message Access
         16) Object Push
         17) Personal Area Network
         18) Phonebook Access
         19) SIM Access
         20) Serial Port
         21) IrSYNC
   
   Function Error.
   
   AG>ServiceDiscovery 3 11
   SDP_Service_Search_Attribute_Request(Headset) Success.
   
   AG>
   SDP Service Search Attribute Response Received (Size = 0x0010)
   Service Record: 1:
   Attribute ID 0x0000
   Type: Unsigned Int = 0x00010001
   Attribute ID 0x0001
   Type: Data Element Sequence
   Type: UUID_16 = 0x1108
   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 = 0x02
   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 = 0x1108
   Type: Unsigned Int = 0x0100
   Attribute ID 0x0100
   Type: Text String = Headset
   Attribute ID 0x0302
   Type: Boolean = TRUE
   

6. After we found the device we need to issue the OpenClient command to open the Client port.

   AG>OpenClient
   Usage: Open [Inquiry Index] [RFCOMM Server Port].
   Function Error.
   
   AG>OpenClient 3 2
   HDSET_Open_Remote_Headset_Port() was successful.
   

7. You should receive an HDSET Open Remote Headset Port indication on the Client console:

   AG>
   atPINCodeRequest: 0x000DFD4072EF
   
   Respond with the command: PINCodeResponse
   
   AG>PINCodeResponse 0000
   GAP_Authentication_Response(), Pin Code Response Success.
   
   AG>
   atLinkKeyCreation: 0x000DFD4072EF
   Link Key: 0x19CDEF146AF8A709A1C93BAA99A6E8EE
   Link Key Stored locally.
   
   AG>
   HDSET Open Port Confirmation, HDSETID: 0x0001, Status 0x0000.
   
   AG>
   HDSET Speaker Gain Indication, ID: 0x0001, Gain: 0x0005.
   
   AG>
   HDSET Microphone Gain Indication, ID: 0x0001, Gain: 0x000A.
   

8. You must now ring the Server device in order to begin the audio streaming process. This can be accomplished by issuing the RingIndication command on the Client.

   AG>RingIndication
   HDSET_Ring_Indication() Success.
   

9. Next we will attempt to setup and release the audio connection on the current port.

   AG>ManageAudio
   Usage: Audio [Release = 0, Setup = 1].
   Function Error.
   
   AG>ManageAudio 1
   HDSET_Setup_Audio_Connection: Function Successful.
   
   AG>
   HDSET Audio Connection Indication, ID: 0x0001.
   
   
   AG>ManageAudio 0
   HDSET_Release_Audio_Connection: Function Successful.
   
   AG>RingIndication
   HDSET_Ring_Indication() Success.