How to get local bluetooth device information

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Created: patrickfrei (26 Oct 2007)

Last edited: hamishwillee (18 Oct 2012)

The following code gets information for the local bluetooth device:

• Host Controller Interface (HCI) version and revision
• Link Manager Protocol (LMP) version and subversion
• Manufacturer code

void CBTInfo::GetBTDevInfoL(TDes& aBTHCIVersion, 
    TDes& aBTHCIRevision, TDes& aBTLMPVersion, 
    TDes& aBTLMPSubversion, TDes& aBTManufacturerName)
    {
    RSocket socket;
    RSocketServ socketServer;
    TRequestStatus status;
    THCILocalVersionBuf lvb;
 
    User::LeaveIfError(socketServer.Connect());
    CleanupClosePushL<RSocketServ>(socketServer);
 
    User::LeaveIfError(socket.Open(socketServer, 
        KBTAddrFamily, KSockSeqPacket, KL2CAP));
    CleanupClosePushL<RSocket>(socket);
 
    socket.Ioctl(KHCILocalVersionIoctl, status, &lvb, KSolBtHCI);
    User::WaitForRequest(status);
    //User::LeaveIfError(status.Int());
 
    CleanupStack::PopAndDestroy(2); // socketServer, socket
 
    aBTHCIVersion.AppendNum(lvb().iHCIVersion);
    aBTHCIRevision.AppendNum(lvb().iHCIRevision);
    aBTLMPVersion.AppendNum(lvb().iLMPVersion);
    aBTLMPSubversion.AppendNum(lvb().iLMPSubversion);
    aBTManufacturerName.AppendNum(lvb().iManufacturerName);
    }

Note: The above variables (e.g. iHCIVersion) are officially deprecated on S60 3rd edition devices. Therefore if you uncomment the line "User::LeaveIfError(status.Int());" in the code above, the application will exit with error '-5' (KErrNotSupported). If you comment the line, the according values should be reliable anyway.