Return-Path: From: Marcel Holtmann To: BlueZ users In-Reply-To: References: Date: Sun, 03 Dec 2006 14:49:37 +0100 Message-Id: <1165153777.19590.31.camel@localhost> Mime-Version: 1.0 Subject: Re: [Bluez-users] estimating distance between two devices Reply-To: BlueZ users List-Id: BlueZ users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Sender: bluez-users-bounces@lists.sourceforge.net Errors-To: bluez-users-bounces@lists.sourceforge.net Hi Loreno, > I need to someway estamate the distance between two bluetooth devices > already connected. I thought in using RSSI for this, but RSSI, as far > as I know, is not a mandatory feature of bluetooth. Besides, in the > tests I have made the scale of the RSSI measurements I got had not a > good sensibility as I moved. So now I am thinking on someway measuring > the rate of retransmissions for estimating this. > > Well, my question is twofold: Does it make any sense the idea of > estimating the distance through the rate of retransmissions?? and, > does anybody would have some hint in this field?? you don't get this information without special vendor commands. The specification only allows you to use the RSSI and Link Quality value and while Link Quality is meant to be vendor specific, the RSSI is not, but its usage in various Bluetooth chips is different. Regards Marcel ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users