Return-Path: Message-ID: <420BB12D.8010107@csr.com> From: Steven Singer MIME-Version: 1.0 To: bluez-devel@lists.sourceforge.net Subject: Re: [Bluez-devel] Lower granularity for INQUIRY interval References: In-Reply-To: Content-Type: text/plain; charset="us-ascii" Sender: bluez-devel-admin@lists.sourceforge.net Errors-To: bluez-devel-admin@lists.sourceforge.net Reply-To: bluez-devel@lists.sourceforge.net List-Unsubscribe: , List-Id: BlueZ development List-Post: List-Help: List-Subscribe: , List-Archive: Date: Thu, 10 Feb 2005 19:08:29 +0000 Catalin Drula wrote: > Is there a way to perform INQUIRY for intervals with > a lower granularity than 1.28 seconds? I know the Bluetooth > specification says no. To inquire for less than 10.24 seconds is a bad idea. Unless you inquire for a single contiguous block lasting 10.24 seconds you do not have a good probability of picking up all devices. Note that, for example, 8 consecutive 1.28 second inquiries is not guaranteed to work. > Could we potential have a new function in the API, say > hci_inquiry_fine_granularity, that does exactly what I described > above? I don't think that it's a good idea to add an API to make it easy to perform actions that are bad ideas. > At the Bluetooth hardware level (if there is anyone that has such > knowledge) does my solution of issuing an INQUIRY CANCEL command before > the expiration of the INQUIRY interval really work? (I have a hunch > that the hardware might stay in INQUIRY mode anyway until the end of the > current 1.28sec time slot). CSR devices will stop inquiring straight away (give or take a few milliseconds). I can't comment on what other manufacturers will do. - Steven -- ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. ********************************************************************** ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel