Re: [Bluez-devel] Re: mystic AT-Command

[Lars Grunewaldt <lgw@dark-reality.de>]

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Channel 6 seems to be OK for your headset, but the AT command that is
send back is wrong, as far as I understood the SCO control channel.

the check in btsco.c for AT+BVRA=1 was only added because I had no
understanding why my headset sometimes used this, and sometimes the
expected AT+CKPD=200 - it was because btsco sometimes used the wrong
channel. Now this should not happen any more as we have (hopefully)
proper channel auto-detection.

You can try to remove AT+BVRA=1 from btsco.c:

484:
					if (strstr(buf, "AT+BVRA=")
					    || strstr(buf, "AT+CKPD=200")
					    || strstr(buf, "AT+CHUP")
					    || strstr(buf, "AT+CIND=?")) {

===
448:
					if (strstr(buf, "AT+CKPD=200")
					    || strstr(buf, "AT+CHUP")
					    || strstr(buf, "AT+CIND=?")) {

best regards,
~  Lars

Sebastian Roth wrote:
| Hi Lars,
|
| thanks for your answer!
|
|> Looks like the wrong channel is selected.
|
| Can't imagine why this can be a problem with the RFCOMM channel. But
| let's give it a try!
|
|
| # sdptool search --bdaddr 00:0B:2E:02:03:A2 0x1108
| Class 0x1108
| Searching for 0x1108 on 00:0B:2E:02:03:A2 ...
| Service Name: Headset
| Service RecHandle: 0x20000
| Service Class ID List:
|   "Headset" (0x1108)
|   "Generic Audio" (0x1203)
| Protocol Descriptor List:
|   "L2CAP" (0x0100)
|   "RFCOMM" (0x0003)
|     Channel: 6
| Language Base Attr List:
|   code_ISO639: 0x656e
|   encoding:    0x6a
|   base_offset: 0x100
|
| If I do not specify a channel to btsco it uses 6.
| I tried to add channels to the commandline. It connects with channel 1
| or 2. But if I tried to establish the SCO channel pressing the button
| the headset continuosly peeps, no SCO connection!
|
| Best regards,
| Sebastian
|
|
|
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- --
Lars Grunewaldt
* software development
* multimedia design
skills: C/C++/Java/PHP/(X)HTML/Flash/audio/video
web: http://www.dark-reality.de
mail: lgw@dark-reality.de
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