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* [Bluez-users] TPL is not changing
@ 2005-01-30  8:47 Kazuhiro Ota
  2005-01-30 14:37 ` Marcel Holtmann
  0 siblings, 1 reply; 6+ messages in thread
From: Kazuhiro Ota @ 2005-01-30  8:47 UTC (permalink / raw)
  To: bluez-users

Hi,

I've installed bluez-libs-2.8-1 and bluez-utils-2.8-1 on our linux 2.4.27 systems with 
HAGIWARA SYS-COM HNT-CFBT Bluetooth cards.

I measured TPL on one computer and found that it was always 0 independently of the  
distance between devices.

The following is the result of actual measurement.

[root@localhost root]# hcitool cc 00:90:02:XX:XX:XX
[root@localhost root]# hcitool tpl 00:90:02:XX:XX:XX
Current transmit power level: 0
[root@localhost root]# hcitool rssi 00:90:02:XX:XX:XX
RSSI return value: -3
[root@localhost root]# hcitool tpl 00:90:02:XX:XX:XX
Current transmit power level: 0
[root@localhost root]# hcitool rssi 00:90:02:XX:XX:XX
RSSI return value: -13
[root@localhost root]# hcitool dc 00:90:02:XX:XX:XX

As you can see, RSSI is changing according to the distance between devices, but 
TPL is not.

I would like to know the reason of this phenomenon.

Anyone has encounterd the same situation ?

Thanks
Kazuhiro


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^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: [Bluez-users] TPL is not changing
  2005-01-30  8:47 [Bluez-users] TPL is not changing Kazuhiro Ota
@ 2005-01-30 14:37 ` Marcel Holtmann
  2005-01-31  1:59   ` Alain Volmat
  2005-01-31  9:45   ` Kazuhiro Ota
  0 siblings, 2 replies; 6+ messages in thread
From: Marcel Holtmann @ 2005-01-30 14:37 UTC (permalink / raw)
  To: BlueZ Mailing List

Hi Kazuhiro,

> I've installed bluez-libs-2.8-1 and bluez-utils-2.8-1 on our linux 2.4.27 systems with 
> HAGIWARA SYS-COM HNT-CFBT Bluetooth cards.
> 
> I measured TPL on one computer and found that it was always 0 independently of the  
> distance between devices.
> 
> The following is the result of actual measurement.
> 
> [root@localhost root]# hcitool cc 00:90:02:XX:XX:XX
> [root@localhost root]# hcitool tpl 00:90:02:XX:XX:XX
> Current transmit power level: 0
> [root@localhost root]# hcitool rssi 00:90:02:XX:XX:XX
> RSSI return value: -3
> [root@localhost root]# hcitool tpl 00:90:02:XX:XX:XX
> Current transmit power level: 0
> [root@localhost root]# hcitool rssi 00:90:02:XX:XX:XX
> RSSI return value: -13
> [root@localhost root]# hcitool dc 00:90:02:XX:XX:XX
> 
> As you can see, RSSI is changing according to the distance between devices, but 
> TPL is not.
> 
> I would like to know the reason of this phenomenon.

this is maybe, because your card doesn't support it. What does
"hciconfig -a" say?

Regards

Marcel




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^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: [Bluez-users] TPL is not changing
  2005-01-30 14:37 ` Marcel Holtmann
@ 2005-01-31  1:59   ` Alain Volmat
  2005-01-31  2:37     ` Marcel Holtmann
  2005-01-31  9:45   ` Kazuhiro Ota
  1 sibling, 1 reply; 6+ messages in thread
From: Alain Volmat @ 2005-01-31  1:59 UTC (permalink / raw)
  To: bluez-users

Hi All,

the HAGIWARE SYS-COM card is a pretty old Ericsson based card and it
doesn't support TPL. See the output of hciconfig:

hci0:   Type: PCCARD
        BD Address: 00:90:02:05:1D:56 ACL MTU: 672:8 SCO MTU: 64:0
        Features: 0xff 0xfb 0x01 0x00 0x00 0x00 0x00 0x00
                <3-slot packets> <5-slot packets> <encryption> <slot offset>
                <timing accuracy> <role switch> <hold mode> <sniff mode>
                <park state> <RSSI> <SCO link> <HV2 packets> <HV3 packets>
                <u-law log> <A-law log> <CVSD>

Alain

* Marcel Holtmann [Sun, 30 Jan 2005 at 15:37 +0100]
<quote>
> Hi Kazuhiro,
> 
> > I've installed bluez-libs-2.8-1 and bluez-utils-2.8-1 on our linux 2.4.27 systems with 
> > HAGIWARA SYS-COM HNT-CFBT Bluetooth cards.
> > 
> > I measured TPL on one computer and found that it was always 0 independently of the  
> > distance between devices.
> > 
> > The following is the result of actual measurement.
> > 
> > [root@localhost root]# hcitool cc 00:90:02:XX:XX:XX
> > [root@localhost root]# hcitool tpl 00:90:02:XX:XX:XX
> > Current transmit power level: 0
> > [root@localhost root]# hcitool rssi 00:90:02:XX:XX:XX
> > RSSI return value: -3
> > [root@localhost root]# hcitool tpl 00:90:02:XX:XX:XX
> > Current transmit power level: 0
> > [root@localhost root]# hcitool rssi 00:90:02:XX:XX:XX
> > RSSI return value: -13
> > [root@localhost root]# hcitool dc 00:90:02:XX:XX:XX
> > 
> > As you can see, RSSI is changing according to the distance between devices, but 
> > TPL is not.
> > 
> > I would like to know the reason of this phenomenon.
> 
> this is maybe, because your card doesn't support it. What does
> "hciconfig -a" say?
> 
> Regards
> 
> Marcel
> 
> 
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting
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> by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc.
> Download a FREE copy at http://www.intelliview.com/go/osdn_nl
> _______________________________________________
> Bluez-users mailing list
> Bluez-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-users
</quote>


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^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: [Bluez-users] TPL is not changing
  2005-01-31  1:59   ` Alain Volmat
@ 2005-01-31  2:37     ` Marcel Holtmann
  0 siblings, 0 replies; 6+ messages in thread
From: Marcel Holtmann @ 2005-01-31  2:37 UTC (permalink / raw)
  To: BlueZ Mailing List

Hi,

> the HAGIWARE SYS-COM card is a pretty old Ericsson based card and it
> doesn't support TPL. See the output of hciconfig:
> 
> hci0:   Type: PCCARD
>         BD Address: 00:90:02:05:1D:56 ACL MTU: 672:8 SCO MTU: 64:0
>         Features: 0xff 0xfb 0x01 0x00 0x00 0x00 0x00 0x00
>                 <3-slot packets> <5-slot packets> <encryption> <slot offset>
>                 <timing accuracy> <role switch> <hold mode> <sniff mode>
>                 <park state> <RSSI> <SCO link> <HV2 packets> <HV3 packets>
>                 <u-law log> <A-law log> <CVSD>

if anyone owns this card and doesn't need it anymore, please donate it
to me. I collect these old Bluetooth devices. This applies to any old
Bluetooth hardware that is no longer in use.

Regards

Marcel




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^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: [Bluez-users] TPL is not changing
  2005-01-30 14:37 ` Marcel Holtmann
  2005-01-31  1:59   ` Alain Volmat
@ 2005-01-31  9:45   ` Kazuhiro Ota
  2005-01-31 12:53     ` Marcel Holtmann
  1 sibling, 1 reply; 6+ messages in thread
From: Kazuhiro Ota @ 2005-01-31  9:45 UTC (permalink / raw)
  To: bluez-users

Hi Marcel,

Thank you for your response.

My "hciconfig -a" says as follows:

hci0:   Type: PCCARD
        BD Address: 00:90:02:05:15:79 ACL MTU: 672:8 SCO MTU: 64:0
        UP RUNNING PSCAN ISCAN
        RX bytes:1232 acl:0 sco:0 events:24 errors:0
        TX bytes:361 acl:0 sco:0 commands:24 errors:0
        Features: 0xff 0xfb 0x01 0x00 0x00 0x00 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'BlueZ (0)'
        Class: 0x000100
        Service Classes: Unspecified
        Device Class: Computer, Uncategorized
        HCI Ver: 1.1 (0x1) HCI Rev: 0x8105 LMP Ver: 1.1 (0x1) LMP Subver: 0x8d40
        Manufacturer: Ericsson Technology Licensing (0)

Regards,

Kazuhiro

-- 
Kazuhiro Ota
The department of information engineering,
Matsue College of Technology
j0006@stu.matsue-ct.jp


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^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: [Bluez-users] TPL is not changing
  2005-01-31  9:45   ` Kazuhiro Ota
@ 2005-01-31 12:53     ` Marcel Holtmann
  0 siblings, 0 replies; 6+ messages in thread
From: Marcel Holtmann @ 2005-01-31 12:53 UTC (permalink / raw)
  To: BlueZ Mailing List

Hi Kazuhiro,

> Thank you for your response.
> 
> My "hciconfig -a" says as follows:
> 
> hci0:   Type: PCCARD
>         BD Address: 00:90:02:05:15:79 ACL MTU: 672:8 SCO MTU: 64:0
>         UP RUNNING PSCAN ISCAN
>         RX bytes:1232 acl:0 sco:0 events:24 errors:0
>         TX bytes:361 acl:0 sco:0 commands:24 errors:0
>         Features: 0xff 0xfb 0x01 0x00 0x00 0x00 0x00 0x00
>         Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
>         Link policy: RSWITCH HOLD SNIFF PARK
>         Link mode: SLAVE ACCEPT
>         Name: 'BlueZ (0)'
>         Class: 0x000100
>         Service Classes: Unspecified
>         Device Class: Computer, Uncategorized
>         HCI Ver: 1.1 (0x1) HCI Rev: 0x8105 LMP Ver: 1.1 (0x1) LMP Subver: 0x8d40
>         Manufacturer: Ericsson Technology Licensing (0)

as Alain already mentioned, this chip lacks the support for power
control. Compare it with a CSR chip:

hci0:   Type: USB
        BD Address: 00:0B:AC:xx:xx:xx ACL MTU: 192:8 SCO MTU: 64:8
        Features: 0xff 0xff 0x0f 0x00 0x00 0x00 0x00 0x00
                <3-slot packets> <5-slot packets> <encryption> <slot offset> 
                <timing accuracy> <role switch> <hold mode> <sniff mode> 
                <park state> <RSSI> <channel quality> <SCO link> <HV2 packets> 
                <HV3 packets> <u-law log> <A-law log> <CVSD> <paging scheme> 
                <power control> <transparent SCO> 
        HCI Ver: 1.1 (0x1) HCI Rev: 0x20e LMP Ver: 1.1 (0x1) LMP Subver: 0x20e
        Manufacturer: Cambridge Silicon Radio (10)

Regards

Marcel




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^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2005-01-31 12:53 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2005-01-30  8:47 [Bluez-users] TPL is not changing Kazuhiro Ota
2005-01-30 14:37 ` Marcel Holtmann
2005-01-31  1:59   ` Alain Volmat
2005-01-31  2:37     ` Marcel Holtmann
2005-01-31  9:45   ` Kazuhiro Ota
2005-01-31 12:53     ` Marcel Holtmann

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