Dear Bluez,
I am having a problem that I wondered whether you could help me with?
I'm currently working on a project in which I'm trying to communicate to an=
Intel Edison board from my Windows PC via Bluetooth. I have managed to suc=
cessfully connect and communicate via Bluetooth using the serial port and b=
luez version 5.22. But my problem is that I can only auto connect to the PC=
once I have already manually paired to the device. So my aim is to have so=
ftware running on the Edison which will be able to auto pair to a PC and co=
nnect without knowing the PC device id in advance, for the PC to then send =
commands and eventually files to the Edison.
I have been able to manually send serial commands to the Edison by using a =
Putty terminal and using rfcomm and the "cat /dev/rfcomm0" command. Using p=
rocess below on the Edison:
rfkill unblock bluetooth
sdptool add -channel=3D22 SP
rfcomm watch /dev/rfcomm0 22 > /dev/null &
bluetoothctl
agent NoInputNoOutput
default-agent
discoverable on
"pair with Edison from PC and accept pairing on the Edison"
cat /dev/rfcomm0
"send text to Edison via Putty terminal com port"
So I have been trying to automate this process by writing C code on the Ecl=
ipse IDE and also by writing scripts running on the Edison but I have not b=
een able to successfully send commands to the bluetoothctl function.
I have tried to send commands using the Eclipse IDE but when I send the fol=
lowing:
system("echo -e 'agent NoInputNoOutput\n | bluetoothctl");
On the Edison it reports "No agent is registered" and the following message=
:
(bluetoothctl:690): GLib-CRITICAL **: Source ID 22 was not found when attem=
pting to remove it
Also if I try to create a script file like the following:
#!/bin/sh
rfkill unblock bluetooth
sdptool add -channel=3D22 SP
sleep 1
bluetoothctl << EOF
agent NoInputNoOutput
EOF
sleep 1
Again it just report "No agent is registered".
I have been in communication with Intel support but I've got to a point whe=
re I don't think I can get any further and they have recommended that I con=
tact you.
https://communities.intel.com/thread/104504
Any help would be very much appreciated.
Kind regards
Jay Montague
Software Engineer
Scott Safety
Unit 14, Repton Close,
Basildon, Essex. SS13 1LN UK
Office: +44 (0)1268 527 700 Ext. 210
Direct: +44 (0)1268 885 360
Fax: +44 (0)1268 527 799
[email protected]
http://www.ScottSafety.com
Follow Scott Safety
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Hi Jay,
On 9 September 2016 at 16:14, Montague, Jay <[email protected]> wrote:
> > you might want to look into using the profile API instead (see doc/profile-api.txt and test/test-profile).
> But I guess ill look into using the API profile instead. You didn't attach any documents so I guess these are available on github or something.
To give the full paths...
The documentation can be found at:
http://git.kernel.org/cgit/bluetooth/bluez.git/tree/doc/profile-api.txt
The Python example for using that API is at:
http://git.kernel.org/cgit/bluetooth/bluez.git/tree/test/test-profile
Hi Johan,
When I manually enter the command "agent NoInputNoOutput" in bluetoothctl i=
t works and registers the agent to be used for when pairing to a Bluetooth =
device. But when I try the same command in code it doesn't register it like=
I described originally, and it doesn't exit bluetoothctl either. It also d=
oesn't work with other commands like "discoverable on" etc.
But I guess ill look into using the API profile instead. You didn't attach =
any documents so I guess these are available on github or something.
Jay
-----Original Message-----
From: Johan Hedberg [mailto:[email protected]]
Sent: 09 September 2016 11:43
To: Montague, Jay <[email protected]>
Cc: [email protected]
Subject: Re: bluez bluetooth problem
Hi Jay,
On Wed, Sep 07, 2016, Montague, Jay wrote:
> I have tried to send commands using the Eclipse IDE but when I send the f=
ollowing:
>
> system("echo -e 'agent NoInputNoOutput\n | bluetoothctl");
>
> On the Edison it reports "No agent is registered" and the following messa=
ge:
bluetoothctl *is* the agent, and since I assume it exits after piping the c=
ommand to it, it's not really a surprise that bluetoothd says there is no a=
gent.
> #!/bin/sh
> rfkill unblock bluetooth
> sdptool add -channel=3D22 SP
> sleep 1
> bluetoothctl << EOF
> agent NoInputNoOutput
> EOF
> sleep 1
>
> Again it just report "No agent is registered".
As I said earlier, that's because bluetoothd presumably exited. It needs to=
run in order for an agent to exist.
Regarding sdptool & rfcomm usage, you might want to look into using the pro=
file API instead (see doc/profile-api.txt and test/test-profile).
It'll take care of the SDP and RFCOMM details for you, and e.g.
completely skip TTYs in favor of RFCOMM sockets (I see you reported that yo=
u had some kernel issues with the TTYs).
Johan
________________________________
This e-mail contains privileged and confidential information intended for t=
he use of the addressees named above. If you are not the intended recipient=
of this e-mail, you are hereby notified that you must not disseminate, cop=
y or take any action in respect of any information contained in it. If you =
have received this e-mail in error, please notify the sender immediately by=
e-mail and immediately destroy this e-mail and its attachments.
Hi Jay,
On Wed, Sep 07, 2016, Montague, Jay wrote:
> I have tried to send commands using the Eclipse IDE but when I send the following:
>
> system("echo -e 'agent NoInputNoOutput\n | bluetoothctl");
>
> On the Edison it reports "No agent is registered" and the following message:
bluetoothctl *is* the agent, and since I assume it exits after piping
the command to it, it's not really a surprise that bluetoothd says there
is no agent.
> #!/bin/sh
> rfkill unblock bluetooth
> sdptool add -channel=22 SP
> sleep 1
> bluetoothctl << EOF
> agent NoInputNoOutput
> EOF
> sleep 1
>
> Again it just report "No agent is registered".
As I said earlier, that's because bluetoothd presumably exited. It needs
to run in order for an agent to exist.
Regarding sdptool & rfcomm usage, you might want to look into using the
profile API instead (see doc/profile-api.txt and test/test-profile).
It'll take care of the SDP and RFCOMM details for you, and e.g.
completely skip TTYs in favor of RFCOMM sockets (I see you reported that
you had some kernel issues with the TTYs).
Johan