October 2002 - Bluetooth-dev

Re: Serial connection with a T68i
by Eric Brown 09 Oct '02

09 Oct '02

On Wednesday, October 9, 2002, at 03:09 PM, Alberto Ricci wrote: Actually, I had the impression that Address Book.app did not open the port in an exclusive mode, because I can use, say, ZTerm on the port while Address Book.app is listening to incoming calls on the bluetooth phone. That's why I was wondering if there was a way to open multiple serial connections with a bluetooth device... Due to the nature of Bluetooth channels (L2CAP and RFCOMM), all of the I/O access mechanism we provide are exclusive. So if one client has registered its incoming data handler (or opened the tty), it will have exclusive use of that channel. Currently the act of registering an incoming data handler is the means to indicate use of a channel. But Eric Brown says that there is a single RFCOMM channel... so why do I see RING messages in the ZTerm window while also getting incoming call messages from Address Book.app? If I look at Address Book.app's communication with my T68i by using PacketDecoder2, I can see it actually gets incoming call notifications through the standard AT command set and unsolicited responses... Some of the Ericsson phones have two different serial port services. Is it possible that you've set up Address Book to use one of them and the tty serial port to use the other? In that scenario you would end up with two separate RFCOMM channels and would likely see the behavior you describe. (by the way, where are constants such as TIOCEXCL documented?) Unfortunately that I do not know. I'll pass the question on to our serial / RFCOMM guy to answer. - Eric At 10:25 AM -0700 10/9/02, Eric Welch wrote: Exclusive use of a Bluetooth serial port is more a POSIX issue than a Bluetooth issue. Consider #include <ttycom.h> ioctl(fd, TIOCEXCL, 0); after you open the port. That should prevent anyone else from being able to get it. _______________________________________________ bluetooth-dev mailing list | bluetooth-dev(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored. _______________________________________________ bluetooth-dev mailing list | bluetooth-dev(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored.

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Re: Serial connection with a T68i
by Alberto Ricci 09 Oct '02

09 Oct '02

Actually, I had the impression that Address Book.app did not open the port in an exclusive mode, because I can use, say, ZTerm on the port while Address Book.app is listening to incoming calls on the bluetooth phone. That's why I was wondering if there was a way to open multiple serial connections with a bluetooth device... But Eric Brown says that there is a single RFCOMM channel... so why do I see RING messages in the ZTerm window while also getting incoming call messages from Address Book.app? If I look at Address Book.app's communication with my T68i by using PacketDecoder2, I can see it actually gets incoming call notifications through the standard AT command set and unsolicited responses... (by the way, where are constants such as TIOCEXCL documented?) Thanks! Alberto. At 10:25 AM -0700 10/9/02, Eric Welch wrote: Exclusive use of a Bluetooth serial port is more a POSIX issue than a Bluetooth issue. Consider #include <ttycom.h> ioctl(fd, TIOCEXCL, 0); after you open the port. That should prevent anyone else from being able to get it. _______________________________________________ bluetooth-dev mailing list | bluetooth-dev(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored.

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Re: Serial connection with a T68i
by Eric Brown 09 Oct '02

09 Oct '02

On Wednesday, October 9, 2002, at 10:25 AM, Eric Welch wrote: Alberto, Exclusive use of a Bluetooth serial port is more a POSIX issue than a Bluetooth issue. Consider #include <ttycom.h> ioctl(fd, TIOCEXCL, 0); after you open the port. That should prevent anyone else from being able to get it. Hope this helps... eric And the problem is that even if you use the Bluetooth APIs to access the RFCOMM channel directly, there is still likely only one Serial Port Profile RFCOMM channel on the device. A single RFCOMM channel only allows for a single client to use it at one time, so while you were using the Bluetooth API to access it, it would be unavailable through the tty. - Eric From: Alberto Ricci <alberto(a)riccisoft.com> Date: Wed, 9 Oct 2002 14:54:28 +0200 To: bluetooth-dev(a)lists.apple.com Subject: Serial connection with a T68i Hello, I am writing an application and I would like to make it communicate with a T68i cellphone via a bluetooth connection. Yeah, I'm new to bluetooth development and protocols. The device is already paired with the Mac, so there is a serial port available for communicating and I could use the usual posix routines to open the port and do serial i/o. However, I would like to be able to communicate with it without preventing other applications from being able to use that serial port. As far as I know, the Address Book application does that. How is this achieved? Or does the Address Book application only open the serial port in a read-only mode with allows other processes to access it? But Address Book does send AT commands to the phone, so it can't be read-only... Any hints? Thank you very much! Alberto. _______________________________________________ bluetooth-dev mailing list | bluetooth-dev(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored. _______________________________________________ bluetooth-dev mailing list | bluetooth-dev(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored. _______________________________________________ bluetooth-dev mailing list | bluetooth-dev(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored.

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Re: Serial connection with a T68i
by Eric Welch 09 Oct '02

09 Oct '02

Alberto, Exclusive use of a Bluetooth serial port is more a POSIX issue than a Bluetooth issue. Consider #include <ttycom.h> ioctl(fd, TIOCEXCL, 0); after you open the port. That should prevent anyone else from being able to get it. Hope this helps... eric > From: Alberto Ricci <alberto(a)riccisoft.com> > Date: Wed, 9 Oct 2002 14:54:28 +0200 > To: bluetooth-dev(a)lists.apple.com > Subject: Serial connection with a T68i > > Hello, > > I am writing an application and I would like to make it communicate > with a T68i cellphone via a bluetooth connection. > > Yeah, I'm new to bluetooth development and protocols. > > The device is already paired with the Mac, so there is a serial port > available for communicating and I could use the usual posix routines > to open the port and do serial i/o. > > However, I would like to be able to communicate with it without > preventing other applications from being able to use that serial > port. As far as I know, the Address Book application does that. > How is this achieved? > Or does the Address Book application only open the serial port in a > read-only mode with allows other processes to access it? But Address > Book does send AT commands to the phone, so it can't be read-only... > > Any hints? > > Thank you very much! > Alberto. > _______________________________________________ > bluetooth-dev mailing list | bluetooth-dev(a)lists.apple.com > Help/Unsubscribe/Archives: > http://www.lists.apple.com/mailman/listinfo/bluetooth-dev > Do not post admin requests to the list. They will be ignored. _______________________________________________ bluetooth-dev mailing list | bluetooth-dev(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored.

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Serial connection with a T68i
by Alberto Ricci 09 Oct '02

09 Oct '02

Hello, I am writing an application and I would like to make it communicate with a T68i cellphone via a bluetooth connection. Yeah, I'm new to bluetooth development and protocols. The device is already paired with the Mac, so there is a serial port available for communicating and I could use the usual posix routines to open the port and do serial i/o. However, I would like to be able to communicate with it without preventing other applications from being able to use that serial port. As far as I know, the Address Book application does that. How is this achieved? Or does the Address Book application only open the serial port in a read-only mode with allows other processes to access it? But Address Book does send AT commands to the phone, so it can't be read-only... Any hints? Thank you very much! Alberto. _______________________________________________ bluetooth-dev mailing list | bluetooth-dev(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored.

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