From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: Re: [Bluez-users] Bluetooth connection too slow From: Marcel Holtmann To: bluez-users@lists.sourceforge.net In-Reply-To: <1133028275.9123.29.camel@localhost.localdomain> References: <1133028275.9123.29.camel@localhost.localdomain> Content-Type: text/plain Message-Id: <1133028830.28718.19.camel@blade> Mime-Version: 1.0 Sender: bluez-users-admin@lists.sourceforge.net Errors-To: bluez-users-admin@lists.sourceforge.net Reply-To: bluez-users@lists.sourceforge.net List-Unsubscribe: , List-Id: BlueZ users List-Post: List-Help: List-Subscribe: , List-Archive: Date: Sat, 26 Nov 2005 19:13:50 +0100 Hi Mario, > I recently bought a Bluetooth 2.0 EDR USB adapter (Trust, BT-2200Tp), > because I wanted to try it out with my new Motorola E1070 (UMTS phone). you need EDR on both sides to profit from it. > I tried it out with my Ubuntu linux. The device has been recognized > properly. Then I tried the Internet connection (with UMTS you can have > more than 30 kBytes/s). Unfortunately all I could see was a transfer > rate (taken with wget downloading the kernel sources from a fast mirror) > of about 9 kB/s. I also tried to do the same with Windows XP and there > the transfer rate reached about 32 kB/s!! I did the same several times > and all the times I had the same results. > Furthermore, I tried to do the same under Linux with a USB connection, > and I'm getting 32kB/s as well. This brought me to think the bottleneck > is in the BT connection. > > This is how I'm setting the BT connection: > $ sudo hcitool cc --role=m 00:0E:A1:45:1F:AE > $ sudo hcitool auth 00:0E:A1:45:1F:AE > $ sudo rfcomm bind 00:0E:A1:45:1F:AE > $ sudo ln -sf /dev/rfcomm0 /dev/modem The two hcitool commands are not needed. RFCOMM can create the piconet by itself. > To dial I'm using exactly the same procedure as when using the USB > connection (with kppp). > > I'm wondering if I need to tweak some parameter of the bluetooth > connection. hciconfig gives me many info but I don't know how to > interpret them and what options to give (where can I find > documentation?). If you reach 32 kB/s then this is a good result. With Bluetooth prior EDR you will reach max something around 80 kB/s, but this is not really doable with PPP in between. The bottleneck can also be the UART inside your mobile phone. Regards Marcel ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users