From: Steven Singer <steven.singer@csr.com>
To: bluez-devel@lists.sourceforge.net
Subject: Re: [Bluez-devel] Inquiry Time
Date: Thu, 08 Dec 2005 12:14:55 +0000 [thread overview]
Message-ID: <439823BF.1@csr.com> (raw)
In-Reply-To: <45bf5ff80512070503g6cfc5189hec21ab22768ed9cd@mail.gmail.com>
Artur Almeida wrote:
> The Bt specification says that once you send a inquiry request, you should
> get all the responses +-11 seconds. Many times i send an inquiry and it
> lasts a lot more then that (Sometimes it goes over a minute). Can someone
> explain how can i limit the inquiry time to the 11 sec window? Why does this
> happens? Also, where can i find a detailed document with all the features
> and parameters of the hciconfig?
I think the way the spec phrases it is that you must inquire for at least
10.24 seconds to have a good probability of picking up all devices.
However, it doesn't say that the inquiry process will stop after 10.24
seconds. The host specifies how long it wants to inquire for in one of
the parameters to HCI_Inquiry. If the host says to inquire for 30
seconds (or whatever) then the chip quite happily will.
hcidump -X -V should reveal the parameters to the HCI_Inquiry command.
>From there you should be able to work out how long the chip has been
told to inquire for.
- Steven
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next prev parent reply other threads:[~2005-12-08 12:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-07 13:03 [Bluez-devel] Inquiry Time Artur Almeida
2005-12-07 13:13 ` Marcel Holtmann
2005-12-08 0:33 ` Artur Almeida
2005-12-08 5:43 ` Marcel Holtmann
2005-12-08 12:14 ` Steven Singer [this message]
2005-12-10 18:55 ` Artur Almeida
2005-12-10 19:05 ` Marcel Holtmann
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