From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <506D8DC2.7010506@rug.nl> Date: Thu, 04 Oct 2012 15:23:14 +0200 From: Sietse Achterop MIME-Version: 1.0 To: linux-bluetooth@vger.kernel.org Subject: Using multiple adapters do not work Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Dear list, I want to use a number, say 2, of local bluetooth adapters that each communicate with a single different bluetooth device. The devices appear as rfcomm devices. We can communicate with the devices using minicom. Binding of the 2 adapters in linux: rfcomm -i hci0 bind /dev/rfcomm1 10:00:E8:6C:D8:14 1 rfcomm -i hci1 bind /dev/rfcomm7 10:00:E8:6C:EC:9E 1 I test with starting minicom for each rfcomm device. The first minicom invocation works perfectly, but the second (and third ...) gets an error: minicom: cannot open /dev/rfcomm7: No such file or directory or sometimes: Permission denied. (the device exists and is said to be readable by ls -l) This on 2 machines with up to date kernels 2.6.32-43-generic and 3.2.0-31-generic (ubuntu) Using only a single adapter in the usual way, using rfcomm.conf, it works perfectly. That is the way in which the pairing has been done before doing the above tests. I assumed that the above would work. What am I doing wrong? Again, if this is the wrong list, please tell me. Regards, Sietse PS I am using this approach because of problems as described on this list on October 2-nd in: Unreliable communication with multiple bluetooth devices and some delay.