Hi, I just found out that this same problem also applies when trying to connect to a BTSPP (or Obex) socket on a Samsung Galaxy Tab (or Galaxy S4). It does however work when I connect to a BTSPP service on a Windows 7 machine using the Microsoft Bluetooth stack. I am very sure that this did work using our software (the avetanaBluetooth Library) with MacOS < X.10. So the situation is that the same software that used to work with any BT counterpart before MacOS X.10, now only works with a limited number of counterparts. Does anyone have an idea about what could have happened? Thanks Moritz

Am 20.04.2015 um 08:46 schrieb Moritz Gmelin <moritz.gmelin@gmx.de>:

Hi,

yes the Thread that is doing the bluetooth stuff is within a RunLoop. And as I said, it does work with all other devices I’ve had in hands so far.

I have done one log of a failed connection attempt and one of a successfull connection from within the BlueChat application (yes, I’ve changed the UUID to BTSPP, which I don’t even use since I’m directly connecting to channel 1 without even doing an SDP inquiry.

Why do I see an SDP search before the real connection even when I did not request one?

The difference I see between the 2 logs is that in the successful log, the connection to PSM 3 is done much earlier (before the SDP reqeust) than in the unsuccessful log. Who is doing this request and can I skip that?

Thanks

Moritz

<logs.zip>

...

Am 17.04.2015 um 13:50 schrieb Moritz Gmelin <moritz.gmelin@gmx.de>:

Hi,

yes the Thread that is doing the bluetooth stuff is within a RunLoop. And as I said, it does work with all other devices I’ve had in hands so far.

I have done one log of a failed connection attempt and one of a successfull connection from within the BlueChat application (yes, I’ve changed the UUID to BTSPP, which I don’t even use since I’m directly connecting to channel 1 without even doing an SDP inquiry.

Why do I see an SDP search before the real connection even when I did not request one?

The difference I see between the 2 logs is that in the successful log, the connection to PSM 3 is done much earlier (before the SDP reqeust) than in the unsuccessful log. Who is doing this request and can I skip that?

Thanks

Moritz

<BT12Fail.pklg><BT12Success.pklg>

...

Am 16.04.2015 um 19:33 schrieb Alexander Traud <alex@traud.de>:

...

Any clues where I could start searching?

In the Xcode Hardware I/O Tools <https://developer.apple.com/downloads/>, you find the Apple PacketLogger which is very handy for Bluetooth Classic.

Are you sure the RFComm channel is still 1? ConnectToServer extracts the channel ID via the Service-Discovery Profile (SDP) and an UUID. By the way, this opens a Bluetooth Baseband connection as well. But you saw that, I guess, because gExampleChatServiceClassUUID is a private UUID, not the one for the Serial-Port Profile (SSP) you are looking for. Mhm.

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