From: Marcel Holtmann <marcel@holtmann.org>
To: Steven Singer <steven.singer@csr.com>
Cc: grpmind+bluez.users@boromir.vpop.net,
BlueZ Mailing List <bluez-users@lists.sourceforge.net>
Subject: Re: [Bluez-users] How to configure a 723kbps connection?
Date: Tue, 17 Feb 2004 18:03:43 +0100 [thread overview]
Message-ID: <1077037423.2665.72.camel@pegasus> (raw)
In-Reply-To: <40323EC2.8080203@csr.com>
Hi Steven,
> >> # hcitool rssi 00:04:3E:81:90:E0
> >> RSSI return value: 0
> >> # hcitool lq 00:04:3E:81:90:E0
> >> Link quality: 255
> >> # hcitool tpl 00:04:3E:81:90:E0
> >> Current transmit power level: -8
> >>
> >>
> >> Does all this mean that my ipaq has a slow UART?
> >
> > No, because the link quality and the RSSI has nothing to do with the
> > choosen packet type.
>
> Marcel, I don't think this is what Matt meant. I think he was asking
> that given that the link quality and power levels are good and given
> that he can't get more that 265 kbps regardless of packet type, is it
> likely that he's being limited by some component of the system other
> than the Bluetooth link - such as the UART baud rate on the Ipaq.
no I don't missed the point here. But the thread was broken and if you
look at the beginning you see that I already told him that it can be a
problem with a too slow UART. This is true for the 3870.
> Is there an easy way to find out what baud rate the Ipaq is using?
> That would answer the question straight away. 265 kbps over the air
> is equivalent to roughly 350 kbps over the UART (assuming one start bit,
> one stop bit, no parity and large HCI packets).
He said that it run Windows, so I can't tell :(
> Also, although you're right that the RSSI has nothing to do with the
> chosen packet type, the link quality has a big effect. As the link
> quality falls, devices will tend to switch automatically from DH
> packets to the more robust DM packets.
The link quality is problematic, because every chip manufacturer can
interpret this value different. For CSR this is bound to the BER. Had
you ever run any test with your chips against the old Zeevo TC2001
generation?
Regards
Marcel
-------------------------------------------------------
SF.Net is sponsored by: Speed Start Your Linux Apps Now.
Build and deploy apps & Web services for Linux with
a free DVD software kit from IBM. Click Now!
http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click
_______________________________________________
Bluez-users mailing list
Bluez-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-users
next prev parent reply other threads:[~2004-02-17 17:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-17 3:42 [Bluez-users] How to configure a 723kbps connection? grpmind+bluez.users
2004-02-17 11:52 ` Marcel Holtmann
2004-02-17 16:18 ` Steven Singer
2004-02-17 17:03 ` Marcel Holtmann [this message]
2004-02-17 22:11 ` Steven Singer
2004-02-17 22:51 ` Marcel Holtmann
[not found] <lists.bluez.users.1077061006.2665.141.camel@pegasus.SOMEWHERE>
[not found] ` <lists.bluez.users.4032E137.7080902@vpop.net>
2004-02-18 3:56 ` Matthew Reimer
[not found] <lists.bluez.users.1077037423.2665.72.camel@pegasus.SOMEWHERE>
[not found] ` <lists.bluez.users.403291AD.7080601@csr.com>
2004-02-17 23:09 ` Matthew Reimer
2004-02-17 23:36 ` Marcel Holtmann
2004-02-18 3:51 ` Matthew Reimer
2004-02-24 3:49 ` Matthew Reimer
2004-02-25 15:03 ` Paulo Marques
[not found] <lists.bluez.users.40327430.2090807@grupopie.com>
2004-02-17 20:45 ` Matthew Reimer
[not found] <200402160913.i1G9DCP02222@webserver.restinfor.pt>
2004-02-17 20:06 ` Paulo Marques
[not found] <lists.bluez.users.40323EC2.8080203@csr.com>
2004-02-17 10:50 ` grpmind+bluez.users
2004-02-17 18:58 ` Marcel Holtmann
-- strict thread matches above, loose matches on Subject: below --
2004-02-17 6:36 grpmind+bluez.users
2004-02-17 15:37 ` Marcel Holtmann
2004-02-14 17:06 grpmind+bluez.users
2004-02-15 14:33 ` Marcel Holtmann
2004-02-16 22:20 ` Michel Planques
2004-02-16 22:58 ` Marcel Holtmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1077037423.2665.72.camel@pegasus \
--to=marcel@holtmann.org \
--cc=bluez-users@lists.sourceforge.net \
--cc=grpmind+bluez.users@boromir.vpop.net \
--cc=steven.singer@csr.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox