Extending the Bluetooth Hands Free Profile

re: Extending the Bluetooth Hands Free Profile

Paul Sneddon — Sat, 13 Aug 2005 22:25:16 GMT

Does this sample only work on WM2005? There are no headers in the SDK for the other versions?

re: Extending the Bluetooth Hands Free Profile

rmg — Mon, 15 Aug 2005 13:01:58 GMT

Hi Greg, Please come back to http://forum.xda-developers.com/viewtopic.php?t=23558

Paul (psneddon) has some new questions for you reagarding enabling the audio gateway on the HTC Magician.

Cheers.

re: Extending the Bluetooth Hands Free Profile

Winfried Klum — Tue, 16 Aug 2005 11:55:56 GMT

Hi Greg,
is the IOCTL_AG_OPEN_AUDIO/IOCTL_AG_CLOSE_AUDIO stuff also working for Windows CE4.2 ?

re: Extending the Bluetooth Hands Free Profile

cenet — Tue, 16 Aug 2005 20:07:55 GMT

The Hands Free Profile was added in Windows CE 5.0. However, it was also included in Windows Mobile 2003 SE which is based on CE 4.2. To find SDK headers (btagpub.h, etc) you need to install Windows CE Platform Builder 5.0.

This feature is not present in Windows CE Platform Builder 4.2.

re: Extending the Bluetooth Hands Free Profile

qwu — Tue, 16 Aug 2005 21:38:54 GMT

could you send me the btagpub.h?

re: Extending the Bluetooth Hands Free Profile

qwu — Wed, 17 Aug 2005 14:57:21 GMT

On a smartphone (like Motorola MPX220) with WM2003 SE, is it possible to route audio to BT Headset using your mentioned way?

re: Extending the Bluetooth Hands Free Profile

cenet — Thu, 18 Aug 2005 02:51:24 GMT

qwu, I believe the MPx220 does not have the ability to route OS audio to a BT headset. It can only route cellular audio.

What info do you need from the header?

#define IOCTL_AG_OPEN_AUDIO 0x01
#define IOCTL_AG_CLOSE_AUDIO 0x02

If you need more info I recommend you download an evaluation version of Windows CE Platform Builder v5.0.

-Greg

re: Extending the Bluetooth Hands Free Profile

Jerry — Tue, 27 Sep 2005 19:51:00 GMT

When a Handsfree connection exists, can I do Push Object? In another words, does Windows CE Bluetooth stack support concurrent connections for multiple profiles?

re: Extending the Bluetooth Hands Free Profile

cenet — Thu, 20 Oct 2005 01:53:11 GMT

Jerry,

The Windows CE Bluetooth stack does support concurrent connections so this is possible given the following assumptions:

1) The remote device also supports this.
2) If you are communicating with two different devices, the BT chip may need to support a feature called "scatternet".

Greg

re: Extending the Bluetooth Hands Free Profile

cenet — Thu, 27 Oct 2005 23:35:24 GMT

See Part 2 of this post here:

http://blogs.msdn.com/cenet/archive/2005/10/27/485839.aspx

Greg

re: Extending the Bluetooth Hands Free Profile

mrm_blue — Fri, 28 Oct 2005 19:49:28 GMT

I want to use WinCE 5.0 for developing a Hands-Free Unit, not Audio Gateway. Does Windows CE support Hands Free Unit?

re: Extending the Bluetooth Hands Free Profile

cenet — Fri, 28 Oct 2005 20:10:41 GMT

Windows CE 5.0 does not support the Hands Free device role of the Hands Free Profile, just Audio Gateway. But it is possible for you to develop this profile by making use of the CE Bluetooth APIs.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wcecomm5/html/wce50conbluetoothapplicationdevelopment.asp

Greg

re: Extending the Bluetooth Hands Free Profile

mrm_blue — Sat, 29 Oct 2005 00:29:45 GMT

Hi Greg,

Saying that I want to develop a Hands Free Unit using WinCE 5.0 Bluetooth device, and want to keep two or more hands-free service level connection to two or more phones, so that any calling to those phones will be notified on my Hands Free Unit. Is this possible?

Thanks,
Jerry

re: Extending the Bluetooth Hands Free Profile

Josh — Tue, 06 Dec 2005 00:05:48 GMT

Thanks for the info! What specifically does IOCTL_AG_OPEN_AUDIO do? Does it just set up the connection? What else has to be done to send or record from the connection? I've been playing around on my phone and when I send an open audio command I can hear my headset "turn on", but nothing seems to change with how the Smartphone routes audio (everything keeps going over the normal speaker).

re: Extending the Bluetooth Hands Free Profile

cenet — Wed, 07 Dec 2005 22:07:28 GMT

Hi Josh,

Some OEMs will only set up audio routing between the cellular radio and Bluetooth due to hardware limitations. In this scenario IOCTL_AG_OPEN_AUDIO will not route OS sounds over BT. I suspect that is the issue you are having.

Thanks,
Greg

re: Extending the Bluetooth Hands Free Profile

Josh — Thu, 08 Dec 2005 11:15:52 GMT

Thanks for a response, I figured as much. What little additional information is available online points to the possibility of using the btscosnd sample driver from PB 5.0 to compensate for the lack of hardware audio routing. I have been able to get btscosnd to compile in eVC4 for SP 2003, however it is not loading properly via the Drivers\BuiltIn registry key and when I try to manually add it via RegisterDevice it fails. I haven't had time to go through and add my own debugging facilities (replacing what's there with a simple file writer seems easiest).

I know next to nothing about PB and if it's possible to use the debug functions on btscosnd.dll even though I have a production device (MPx220). I guess my question then would be if it's theoretically possible to get btscosnd.dll to work under SP 2003, or if I'm barking up the wrong tree. Any pointers as to what might be the problem before I dive in would be great.

If I DO get it to work, I assume it will automatically bind to any connected headset on WAV_OPEN or WAV_INIT? I can probably figure that out from the source.

Also, do you happen to know if there is there any way of setting the default input/output wav device? Ideally I would be able to map WAV5: (btscosnd) to default, so all the programs use it for input/output. Or is that handled directly by the programs? Sorry for all the questions, I'm quite new to CE programming.

Thank you!

re: Extending the Bluetooth Hands Free Profile

jing — Fri, 06 Jan 2006 06:29:26 GMT

Hi Greg,

I used the IOCTL_AG_OPEN_AUDIO to open up the audio connection as you suggested and was able to hear sounds from my handsfree device. But my problem is, after a phone call, the audio connection is always terminated. Seems like the btagsvc is forcing a disconnection?
Is there any workaround?

thanks
jing

re: Extending the Bluetooth Hands Free Profile

Vincent — Fri, 13 Jan 2006 12:35:27 GMT

Hi Greg,

I am able to use IOCTL_AG_OPEN_AUDIO to route system sounds to BT handsfree. Cellular audio is also routed to BT handsfree when a phone call is established. But when the phone call disconnects, the audio connection to the BT handsfree is also disconnected.

Is it possible to maintain the BT audio connection even after the phone call disconnects, so that system sounds is still routed to BT handsfree?

Thank you!

re: Extending the Bluetooth Hands Free Profile

Jeff — Tue, 28 Feb 2006 23:33:19 GMT

Is there a possibility that Microsoft will add this functionality to Voice Command so people won't have to do all of these hacks?

Toby's Travels — Sun, 12 Mar 2006 00:16:43 GMT

One smart cookie over at PDAPhoneHome.com has written a utility that redirects all audio on your Windows Mobile device and sends it to your Bluetooth headset, allowing you to use Skype, listen to audio books and music all hands free!Here is the utility

re: Extending the Bluetooth Hands Free Profile

SSR — Thu, 06 Jul 2006 20:36:10 GMT

I tried using this utility on my UTstarcomm 6700 but after 10 seconds bluetooth shuts off and audio goes back to device. Anyone has fix on this?

re: Extending the Bluetooth Hands Free Profile

Paul Grant (PG2006) — Tue, 15 Aug 2006 16:20:31 GMT

Hi Greg,

I'm trying to programatically make a connection to Bluetooth headset from WM5 device.

Using the GU interface provided on the device, I can
a. discover the headset device, and authenicate
b. Select the headset service, however I'm not certain what is actually done programatically when perform
this selection in the GUI
c. Using the code from your web page, I can redirect the audio of the WM5 device to the headset.

This all works fine !

I am now trying to do this all programatically, I've been looking through a description of the headset
profile, it seems to indicate that the AG can initiate a connection to the HS, the AG is responsible for the
creation of :

1. Connection establishment
2. SCO link establishment

In the following code, I think the BthCreateACLConnection & BthAuthenticate are
performing 1, and BthCreateSCOConnection is performing 2. your code would then
perform c.

if (ERROR_SUCCESS == BthCreateACLConnection (&b, &h)) {
iRes = BthAuthenticate (&b);
BthCloseConnection (h);

int res = BthCreateSCOConnection (&b, &hSCO);

}
else {
iRes = GetLastError ();
MessageBox (hWnd, L"Connection failed", L"Error", MB_OK | MB_TOPMOST);
}

I'm currently attempting to make to SCO connection to the BT_ADDR of the device,
as opposed to the socket of the headset service. I'm not certain if this is correct or not.
I get an error code 1229 which means :

An operation was attempted on a nonexistent network connection.

Am I doing something wrong !

Cheers

Paul Grant

re: Extending the Bluetooth Hands Free Profile

Gregoire — Wed, 01 Nov 2006 18:15:37 GMT

I found a software product that controls the voice routing to the Bluetooth Headset.

It's called BlueMusic and you can download it from http://www.teksoftco.com

It works great. Actually I never thought that listening to music with a Bluetooth headset can be this cool.

I even managed to create voice notes (with the Notes sound recorder) with perfect quality.

Im planning to test it with Skype and I'll let you know of the results!

re: Extending the Bluetooth Hands Free Profile

Gregoire — Wed, 01 Nov 2006 21:55:11 GMT

Sorry for the high frequency of posts, but now it hit me...

Can any of you experts explain how the voice itself goes from the phone modem to the bluetooth headset?

Is it possible to save that voice stream or whatever that is to a WAV file locally on the mobile device?

re: Extending the Bluetooth Hands Free Profile

David Mays — Wed, 08 Nov 2006 10:49:53 GMT

I have written a shareware tool that will enable BT audio on a WM5 Smartphone.

You may download it at http://www.davidmays.com/BTAudio/

It is a fully featured, unlimited shareware application.

I do not have the money to deal with Certificates, so it is unsigned.

re: Extending the Bluetooth Hands Free Profile

Kirill — Fri, 24 Nov 2006 12:54:03 GMT

Hi Greg,

I've implemented the procedure you described with IOCTL_AG_OPEN_AUDIO. And I am able to hear my BT headset is switched ON by this piece of code, but it still does not route all system sounds to the HF. And I am sure it is not a hardware limitation - when I push HF button for voice dialing then for some seconds I am able to hear all system sounds in the HF until the voice tag application is still active...

Please explain how I can get it running proper.

I am using HTC TyTN + WM5.

Thank you in advance!

re: Extending the Bluetooth Hands Free Profile

David Mays — Tue, 13 Feb 2007 07:03:04 GMT

My shareware utility has been updated, and some users at www.howardforums.com have been using it with great success. http://www.davidmays.com/BTAudio/

I make use of the aforementioned IOCTL call, using P/Invoke from .NET CF 2.0.

The free version is time limited to 30 minutes at a time, and will not automatically re-enable audio after a call has been received. The pay version is not time limited, and does automatically re-enable the audio routing after a call.

Feel free to contact me here with any questions.

david.mays

gmail.com

re: Extending the Bluetooth Hands Free Profile

Adrial — Thu, 03 May 2007 11:39:54 GMT

Hi,

I'm actually trying to do the reverse of what seems to be discussed in this forum for quite some time now but to no avail.

I'm trying to create a wince based hands-free unit for an in-car computer application. Basically, I have a WINCE 5.0 mobile device running in an in-car environment and this device is already connected to the car audio system. I would want to write an application which allows this mobile device to connect as a hands-free unit to any bluetooth enabled mobile phone.

Has anyone had any experience in doing something like that? As there are very little information to create something like that, I have been stuck at this for almost half a year now.

Any help would be deeply appreciated! Thanks in advance to any kind soul out there who has a clue to how I should proceed.

re: Extending the Bluetooth Hands Free Profile

George — Mon, 07 May 2007 13:45:02 GMT

Dear all, I want find on the internet bluetooth profile for handsfree. I have Pocket Pc Asus A632N, that have Handsfree profile for sending audio to handsfree kit, and A2DP profile for sending audio to bluetooth audio device. But I can not find profile for "virtual" handsfree, for simulation of handsfree on my pocket, for example GPS software running in my car, and my phone Sony Ericson is in bag, phone has found my virtual handsfree on the pocket. Pocket have windcom bluetooth without this profile.

re: Extending the Bluetooth Hands Free Profile

Eddie — Tue, 12 Jun 2007 13:53:25 GMT

Hi all,

I am trying to simulate Windows Mobile 5 device as a hands free unit. I have registerd the SDP record and created the service connection between HF and AG, but have no idea of how to receive audio from AG. Should I use the same way as AG to access the SCO connection? Thanks for any advice.

re: Extending the Bluetooth Hands Free Profile

Hrene — Wed, 22 Aug 2007 19:11:38 GMT

hi!

this software product that controls sound routing is amazing!!!!...

hope it will work on my <a href="http://www.techfocus.co.uk/Bluetooth-Headsets/BT150.htm" title=" Jabra Bluetooth Headset">jabra Bluetooth Headset</a>

Redirect ALL audio to Bluetooth Headset - PDAPhoneHome.com

Redirect ALL audio to Bluetooth Headset - PDAPhoneHome.com — Mon, 17 Dec 2007 20:36:32 GMT

PingBack from http://pdaphonehome.com/forums/ppc-6800-xv6800/99107-redirect-all-audio-bluetooth-headset.html#post696825

re: Extending the Bluetooth Hands Free Profile

Ankzz — Tue, 06 May 2008 14:57:12 GMT

When I run the code provided over here I get following exception:

Exception 'Prefetch Abort' (3): Thread-Id=06780016(pth=83ac1b58), Proc-Id=00400002(pprc=82209308) 'NK.EXE', VM-active=05970006(pprc=8310bbd8) 'servicesd.exe'

PC=00000000(???+0x00000000) RA=c0923378(btscosnd.dll+0x00003378) SP=d9fcf87c, BVA=00000000

EXCEPTION IN WAV_IOControl!!!!

Another audio driver is also running with name as "WAV1:" , Is it the one causing problem

re: Extending the Bluetooth Hands Free Profile

Ankzz — Thu, 08 May 2008 10:30:06 GMT

I removed the other wave driver, still I am getting the same Exception.

Its giving exception when it goes for the IOCTL "WODM_GETDEVCAPS "

re: Extending the Bluetooth Hands Free Profile

Gautam Kumar — Wed, 14 May 2008 09:09:46 GMT

Hi Greg ,

I am making an application where i am using pocket pc as bluetooth device and any mobile as gateway

for HF profile.

I did followint thing.

I made a application where in I am searching for device and then paring with any BT mobile found.

I made a service level connection using winsck here passing HF uuid .

then waiting in recv api for recving AT commds from BT mobile.

I am sucessfull in establ;ishing a service level connection but after a few second of connection establishment the connection breaks .

I am also not able to send or recv anything .

any help on this regard will be kindly welcomed

re: Extending the Bluetooth Hands Free Profile

Shinu — Wed, 04 Jun 2008 13:39:09 GMT

Hi All,

I am trying to create a winCE based HS/HF device (Here the WincE will act as the HS/DF device side not AG side). I have done the connection establishment from the HS side to some mobile ,After the connection establishment I can able to recieve the Ring and also able to attend the call. But I am not able to route the audio. Whether the Mobile will route the audio to the headset?. Whether I need to do any operation to enable the audio in the headset. In which layer I ll be recieving the voice data. How I can take this data and direct to the speaker. same for the mic also. Please give some Idea for this as early as possible.

Thanks&Regards,

Shinu

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