[SOLVED] connect BT issue on linux

victorwang · 08-09-2017, 01:40 AM

I'm using Linux+QT for my OS system.

And I'm trying to connect my Speaker via BT.

I do it with following steps.

1. I try to run 'hciconfig hci0 up'.And it shows following results.

Code:

hci0:   Type: BR/EDR  Bus: USB

BD Address: AC:83:F3:59:B1:CB  ACL MTU: 1021:8  SCO MTU: 64:1

UP RUNNING PSCAN ISCAN

RX bytes:40790 acl:192 sco:0 events:1010 errors:0

TX bytes:46845 acl:184 sco:0 commands:573 errors:0

2. I will scan by running

Code:

hcitool scan

Then I will get my Speaker address.

3. I try to run

Code:

rfcomm bind hci0 xx:xx:xx:xx:xx:xx 1

And i will get rfcomm0 under /dev .

P.S `xx:xx:xx:xx:xx:xx` is my local BT device address.

4. I try to connect by running

Code:

rfcomm connect hci0 78:45:62:55:66:99 1

Then i will get `Can't connect RFCOMM socket: Operation now in progress` in
30 seconds.

P.S `78:45:62:55:66:99` is Speaker BT address.

My question is what did `Operation now in progress` mean when it also tell me that `Can't connect RFCOMM socket` ?

Did I connect my Speaker successfully or not?

If not how did i solve this problem?

Did I miss any steps here?

This is my email.
victor_wang@winmate.com.tw

TB0ne · 08-09-2017, 03:23 PM

Quote:

Originally Posted by victorwang

I'm using Linux+QT for my OS system.
And I'm trying to connect my Speaker via BT. I do it with following steps.

1. I try to run 'hciconfig hci0 up'.And it shows following results.

Code:

hci0:   Type: BR/EDR  Bus: USB
BD Address: AC:83:F3:59:B1:CB  ACL MTU: 1021:8  SCO MTU: 64:1
UP RUNNING PSCAN ISCAN
RX bytes:40790 acl:192 sco:0 events:1010 errors:0
TX bytes:46845 acl:184 sco:0 commands:573 errors:0

2. I will scan by running

Code:

hcitool scan

Then I will get my Speaker address.

3. I try to run

Code:

rfcomm bind hci0 xx:xx:xx:xx:xx:xx 1

And i will get rfcomm0 under /dev .
P.S `xx:xx:xx:xx:xx:xx` is my local BT device address.

4. I try to connect by running

Code:

rfcomm connect hci0 78:45:62:55:66:99 1

Then i will get `Can't connect RFCOMM socket: Operation now in progress` in 30 seconds.
P.S `78:45:62:55:66:99` is Speaker BT address.

My question is what did `Operation now in progress` mean when it also tell me that `Can't connect RFCOMM socket` ? Did I connect my Speaker successfully or not?

Can you play music through it? If not...you didn't.

Quote:

If not how did i solve this problem? Did I miss any steps here? This is my email.

Sorry, no. This is a community forum, so unless you participate in the discussion here, you will not get answers. This isn't the place to come for personalized, free, one-on-one tech support via email. You need to read the "Question Guidelines" and "How to ask a smart question" links in my posting signature.

While you provide the commands and their results, you omit a great deal of other things, such as the version/distro of Linux, what kind of desktop GUI you're using, if you've ever had bluetooth device working with this system before, what kind of speaker, etc. Typically, in both KDE and Gnome, there is a taskbar applet for Bluetooth, where you can right-click and add devices much more easily.

victorwang · 08-10-2017, 01:33 AM

I am sure that my devices working.
I can using bluetoothctl to connect my Phone via BT.
But It is strange that if I using this command and it will not work.

Code:

rfcomm connect hci0 xx:xx:xx:xx:xx:xx 1

I'm using Linux 4.1.15.
It is the first time I porting the bluetooth device on my i.MX6 sabreSD platform.
I build the image by using Yocto project.
I just trying to connect my Speaker via BT by typing command on terminal.

My Speaker is a simple Speaker to connect BT and broadcast sound out.

Do you have other suggestion?
Or you need more information?

TB0ne · 08-10-2017, 08:30 AM

Quote:

Originally Posted by victorwang

I am sure that my devices working. I can using bluetoothctl to connect my Phone via BT. But It is strange that if I using this command and it will not work.

Code:

rfcomm connect hci0 xx:xx:xx:xx:xx:xx 1

You asked if you connected to your speaker successfully. Since you can't play music/use it, then you obviously DID NOT connect successfully

Quote:

I'm using Linux 4.1.15.

There is no "Linux 4.1.15"...what version/distro????? CentOS 6? Mint 17? Ubuntu 16.04???

Quote:

It is the first time I porting the bluetooth device on my i.MX6 sabreSD platform. I build the image by using Yocto project. I just trying to connect my Speaker via BT by typing command on terminal. My Speaker is a simple Speaker to connect BT and broadcast sound out. Do you have other suggestion? Or you need more information?

So you are using a custom image on an embedded system; this is FAR different than a desktop/server system. It would help you to read up on the various types of Bluetooth devices. Things like speakers are audio devices, and phones are not. You may not have A2DP enabled/compiled in, to allow bluetooth to use such a device.