Raspberry Pi Forums

Posted: **Fri Apr 24, 2015 12:03 pm**

Hello,
I’m trying to get the headset H0781 to work with raspberry pi b+. The headset is in discovery mode:

My commands and respective output:

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uname -a

Linux two 3.18.10+ #774 PREEMPT Wed Mar 25 13:58:34 GMT 2015 armv6l GNU/Linux

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hcitool scan

Scanning ...
07:81:02:15:86:12 JETech H0781

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sudo bluez-test-device trusted 07:81:02:15:86:12 yes

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sudo bluez-test-input connect 07:81:02:15:86:12

Traceback (most recent call last):
File "/usr/bin/bluez-test-input", line 40, in <module>
input.Connect()
File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 70, in __call__
return self._proxy_method(*args, **keywords)
File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
**keywords)
File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking
message, timeout)
dbus.exceptions.DBusException: org.bluez.Error.NotSupported: Operation is not supported

What is going wrong here? Is it headset related? How can I get the headset to work?

Posted: **Fri Apr 24, 2015 2:41 pm**

At first, by looking at /var/log/messages I found that the firmware file firmware/brcm/BCM20702A0-0a5c-21ec.hcd could not be found. I downloaded fw-0a5c_21ec.hcd and copied into /lib/firmware/brcm/BCM20702A0-0a5c-21ec.hcd as suggested in http://plugable.com/2014/06/23/plugable ... s-on-linux
The complains are now gone. But the connect is still not working:

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sudo bluez-test-input connect 07:81:02:15:86:12

still gives:

File "/usr/bin/bluez-test-input", line 40, in <module>
input.Connect()
File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 70, in __call__
return self._proxy_method(*args, **keywords)
File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
**keywords)
File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking
message, timeout)
dbus.exceptions.DBusException: org.bluez.Error.NotSupported: Operation is not supported

Posted: **Fri Apr 24, 2015 3:01 pm**

Bluez-test-input is for HID devices, like keyboards. Try bluez-test-audio. I'm afraid I don't have a headset, so can't be much help.

Posted: **Fri Apr 24, 2015 3:27 pm**

Douglas6 wrote:Bluez-test-input is for HID devices, like keyboards. Try bluez-test-audio. I'm afraid I don't have a headset, so can't be much help.

Thanks! I have replaced bluez-test-input with bluez-test-audio. The error message is gone!

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aplay -L

gives

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default
    Playback/recording through the PulseAudio sound server

But still, I can't hear anything while playing a wav file on raspberry pi. And I get new errors in /var/log/messages:
...
Apr 24 17:19:08 two pulseaudio[3634]: [pulseaudio] main.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.NotSupported: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
...
My raspberry pi is headless. Any ideas?

Posted: **Fri Apr 24, 2015 4:15 pm**

viewtopic.php?t=31961&p=278613 suggests to put

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DBUS_SESSION_BUS_ADDRESS=unix:path=/run/dbus/system_bus_socket
DBUS_SESSION_BUS_PID=`cat /run/dbus/pid`

into

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/etc/rc.local

After doing this and rebooting the headset works! Still, the sound is very dull.

Posted: **Fri Apr 24, 2015 4:18 pm**

Looks like you're running Pulseadio in user mode? I always use system-wide mode, but here are a few things to try. First, add your user to the 'lp' group, that might help with D-Bus issues. Also add to the pulse-access group, to get access to the pactl command (may not be required in user mode):

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sudo adduser pi lp
sudo adduser pi pulse-access

You should have the PA module-bluetooth-discovery module loaded; check it with

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pactl list modules

and you should see something like

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Module #12
        Name: module-bluetooth-discover
        Argument:
        Usage counter: n/a
        Properties:
                module.author = "Joao Paulo Rechi Vita"
                module.description = "Detect available bluetooth audio devices and load bluetooth audio drivers"
                module.version = "2.0"

You have the headset paired and trusted already, so if the headset is connected, you should also see a module-bluetooth-device corresponding to your headset. If you're lucky, you'll have a corresponding PA sink;

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pactl list sinks

to see. One last step, you want to loop back the default Pulseaudio source to your headset sink. Something like:

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pactl load-module module-loopback source=0 sink=bluez_sink.AA_BB_CC_DD_EE_FF

It's just that easy*.

*With BlueZ, it's NEVER that easy, but I hope that helps a little

Posted: **Fri Apr 24, 2015 4:30 pm**

ole359 wrote:After doing this and rebooting the headset works! Still, the sound is very dull.

AH, good, ignore everything I said, then

pactl has a volume control, something like

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pactl set-sink-volume bluez_sink.AA_BB_CC_DD_EE_FF 100%

if it's not at 100% already (pactl list sinks should tell you.)

Posted: **Sat Apr 25, 2015 4:24 pm**

Thanks, the playback is working now. The next problem is to get the microphone to record. I have bluez 4.99 installed, so the mike should be supported? It is not recording now. Any suggestions are welcomed!

Posted: **Sat Apr 25, 2015 6:17 pm**

Use the 'pactl list sources' command to see if BlueZ has set up an audio source for your headset. If so, you can use the given name for commands such as 'parecord'. If not, maybe someone else with a BT headset can chime in here.

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