December 2009 - Bluetooth-dev

IOBluetoothRFCOMMChannel writeSync:length: hangs or crashes
by Jan-Felix Schwarz 21 Dec '09

21 Dec '09

site_archiver(a)lists.apple.com Delivered-To: bluetooth-dev(a)lists.apple.com Hi, I have the following method that writes AT commands to a RFCOMM channel: - (void) sendData:(NSString *)string toChannel:(IOBluetoothRFCOMMChannel*)rfcommChannel { int i; // Turn the string into data. NSData *data = [string dataUsingEncoding:NSASCIIStringEncoding]; char buffer[ [data length] +4]; char *bytes = (char *) [data bytes]; // Add a CRLF to the start buffer[0] = 13; buffer[1] = 10; // Copy the data into the buffer. for (i=0;i<[data length];i++) { buffer[2+i] = bytes[i]; } // Append a CRLF buffer[ [data length]+2] = 13; buffer[ [data length]+3] = 10; // Synchronously write the data to the channel. [rfcommChannel writeSync:&buffer length:[data length]+4]; } That works fine in most cases, but sometimes the call of writeSync:length: takes around 5 seconds while my program is in busy waiting. Sometimes the whole system even crashes during the call of writeSync:length: and I have to hard-reset my MacBook:( I cannot find anything in the logs. Did anyone on the list experience problems like that? I have OS 10.6.2 installed and the version of the Apple Bluetooth Software is 2.2.4f3. Thanks for your help, Jan _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Selecting an external USB bluetooth adapter
by Matthias Ringwald 12 Dec '09

12 Dec '09

site_archiver(a)lists.apple.com Delivered-To: bluetooth-dev(a)lists.apple.com Hi Andy if you really need to use different/external BT adapters, have a look at my BTstack project at http://btstack.googlecode.com It is aimed at embedded devices, but I do most development/testing on the Mac. For your use case, it has the following "drawbacks" * it only supports a single BT adapter like the Mac OS X stack - but you could run multiple instances, e.g. one per adapter * I've implemented the BT USB transport code, but it isn't working yet - shouldn't be too hard, but didn't find time to finish it yet. I'm using a serial BT dongle from 2002, which works fine (http://www.tik.ee.ethz.ch/~beutel/projects/bttester/bt_tester.html) For more discussion on using BTstack, please join the BTstack mailing list Best Matthias On Dec 12, 2009, at 1:19 PM, Andy Bloch wrote: > Thanks. That will work to manually select the external adapter, but > it requires a system password so it's probably not a good way for an > application to switch automatically between devices. I'd like to do > it from my Objective-C code. > > Ideally, I'd like to access the external adapter outside of the API so > the internal bluetooth can remain active. All I really care about is > opening a connection and getting the RSSI value. > > Andy > > Personal home page: www.andybloch.com > > > > > On Sat, Dec 12, 2009 at 3:16 AM, Matthias Ringwald <mringwal(a)inf.ethz.ch> wrote: >> >> try the "HCI Controller Selector" of the OS "Bluetooth Explorer" tool. >> >> Matthias >> On Dec 12, 2009, at 12:12 PM, Andy Bloch wrote: >> >>> How does one disable an internal bluetooth adapter and select an >>> external one instead? I have a bluetooth dongle that I want to use. >>> When I plug it in, OS-X sometimes switches to it, but sometimes >>> doesn't. I'd also like to be able to switch between the internal and >>> external adapter or multiple external adapters. (I want to be able to >>> use multiple adapters so I can use multiple directional bluetooth >>> adapters.) Primarily I'm interested in getting RSSI signal levels for >>> proximity detection. >>> >>> Ideally it would be nice if the OS-X bluetooth API supported multiple >>> Bluetooth adapters simultaneously, but according to what I've read in >>> the archives it doesn't. (Seems like a poor API design decision to >>> me.) >>> >>> Andy >>> _______________________________________________ >>> Do not post admin requests to the list. They will be ignored. >>> Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >>> Help/Unsubscribe/Update your Subscription: >>> http://lists.apple.com/mailman/options/bluetooth-dev/mringwal%40inf.ethz.ch >>> >>> This email sent to mringwal(a)inf.ethz.ch >> >> _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Selecting an external USB bluetooth adapter
by Andy Bloch 12 Dec '09

12 Dec '09

site_archiver(a)lists.apple.com Delivered-To: bluetooth-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:reply-to:in-reply-to :references:from:date:message-id:subject:to:content-type :content-transfer-encoding; bh=nP0lxYWyD84WZchTUyi42hFNrwfZbidnvaTdenabpkc=; b=nOG0b5OSmuPk2JAvMrrt/2KhVC6FkvtZkvtGWoRBd13dqIOw6pQpzfHw2iYIrTgq6Z KLFfAyqymp1/rKxIn0baQf6Q8vF2ax2T1INiDzq9U88ZB7HsSXHOtpZKu7sTzT4nJ+2u 7dzprFnSgISbRg71ENLQ1y7mf+eOsJNNryjdE= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:reply-to:in-reply-to:references:from:date:message-id :subject:to:content-type:content-transfer-encoding; b=pPtubf85xNua3AFCNGxfREGikuVmEAnkUCtfrgPI5Xhe8hiQCUmS0pwIKKlWbqVZMq oQOvIRmLQzhjQc1O5T6UqOosRkaO1hExQK8cMw8QtjIZTV8dqfNjgKzvTFSdP+Wa5CLK VwrQc0QRyLo+Av7cEYv3EbWQwXQmR3kq4yEao= Thanks. That will work to manually select the external adapter, but it requires a system password so it's probably not a good way for an application to switch automatically between devices. I'd like to do it from my Objective-C code. Ideally, I'd like to access the external adapter outside of the API so the internal bluetooth can remain active. All I really care about is opening a connection and getting the RSSI value. Andy Personal home page: www.andybloch.com On Sat, Dec 12, 2009 at 3:16 AM, Matthias Ringwald <mringwal(a)inf.ethz.ch> wrote: > > try the "HCI Controller Selector" of the OS "Bluetooth Explorer" tool. > > Matthias > On Dec 12, 2009, at 12:12 PM, Andy Bloch wrote: > >> How does one disable an internal bluetooth adapter and select an >> external one instead? I have a bluetooth dongle that I want to use. >> When I plug it in, OS-X sometimes switches to it, but sometimes >> doesn't. I'd also like to be able to switch between the internal and >> external adapter or multiple external adapters. (I want to be able to >> use multiple adapters so I can use multiple directional bluetooth >> adapters.) Primarily I'm interested in getting RSSI signal levels for >> proximity detection. >> >> Ideally it would be nice if the OS-X bluetooth API supported multiple >> Bluetooth adapters simultaneously, but according to what I've read in >> the archives it doesn't. (Seems like a poor API design decision to >> me.) >> >> Andy >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >> Help/Unsubscribe/Update your Subscription: >> http://lists.apple.com/mailman/options/bluetooth-dev/mringwal%40inf.ethz.ch >> >> This email sent to mringwal(a)inf.ethz.ch > > _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Selecting an external USB bluetooth adapter
by Matthias Ringwald 12 Dec '09

12 Dec '09

site_archiver(a)lists.apple.com Delivered-To: Bluetooth-dev(a)lists.apple.com try the "HCI Controller Selector" of the OS "Bluetooth Explorer" tool. Matthias On Dec 12, 2009, at 12:12 PM, Andy Bloch wrote: > How does one disable an internal bluetooth adapter and select an > external one instead? I have a bluetooth dongle that I want to use. > When I plug it in, OS-X sometimes switches to it, but sometimes > doesn't. I'd also like to be able to switch between the internal and > external adapter or multiple external adapters. (I want to be able to > use multiple adapters so I can use multiple directional bluetooth > adapters.) Primarily I'm interested in getting RSSI signal levels for > proximity detection. > > Ideally it would be nice if the OS-X bluetooth API supported multiple > Bluetooth adapters simultaneously, but according to what I've read in > the archives it doesn't. (Seems like a poor API design decision to > me.) > > Andy > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/bluetooth-dev/mringwal%40inf.ethz.ch > > This email sent to mringwal(a)inf.ethz.ch _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Selecting an external USB bluetooth adapter
by Andy Bloch 12 Dec '09

12 Dec '09

site_archiver(a)lists.apple.com Delivered-To: Bluetooth-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:reply-to:from:date :message-id:subject:to:content-type; bh=KXo7IxIQlyFBLsZ0JlZzGZQ/csS2jnVOSXLAqDIJDQ4=; b=qDwroC8kE27vQv4OsvEFXFlsZPmJB+9J7xaN+1Uvg+nBr+XuTQerXZhj/qUdPVeDLV eeqrdNtid9P/ftnL0QAr7H0jJlJx6nkDPZrggoVp7nunO+EelEXMocRHcitDeplls2OQ y6N0hq6ZbZ/AtLzQFK2VnGhfjwNfKuHmwZq0g= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:reply-to:from:date:message-id:subject:to:content-type; b=cSAvHm+O93Vfg4ZLGuPmPY7CBwDQDz1wfX++6JrhLyJRsmLZdCMJOwaiHsECSr7+Yq UhwC9/65P5/zZnU0PnLP9jS4g40oL36qNVqi078zoTBHClr5Inh8zflSBneZDM05MM0L QEdWzL3ep8saAcI+A0uMWFfmmR4pDZCf99wfE= How does one disable an internal bluetooth adapter and select an external one instead? I have a bluetooth dongle that I want to use. When I plug it in, OS-X sometimes switches to it, but sometimes doesn't. I'd also like to be able to switch between the internal and external adapter or multiple external adapters. (I want to be able to use multiple adapters so I can use multiple directional bluetooth adapters.) Primarily I'm interested in getting RSSI signal levels for proximity detection. Ideally it would be nice if the OS-X bluetooth API supported multiple Bluetooth adapters simultaneously, but according to what I've read in the archives it doesn't. (Seems like a poor API design decision to me.) Andy _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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