We've been watching on the system monitor of both machines We just subscribed to the raw channels instead of the compressed and we're seeing a transfer rate of up to 8MB/s on the system monitor instead of 1MB/s, so the problem has something to do with the compression any ideas? On Mon, Mar 7, 2011 at 5:27 PM, Ken Conley wrote: > Have you taken the measurement using some other means? Please note from > the documentation below that "rostopic bw" is not the best means of > measuring this: > > """ > http://www.ros.org/wiki/rostopic#rostopic_bw > NOTE: the bandwidth reported is the received bandwidth. If there are > network connectivity issues, or if rostopic cannot keep up with the > publisher, the reported number may be lower than the actual bandwidth. > rostopic is implemented in Python, which cannot maintain as high throughput > as roscpp -based nodes. > """ > > - Ken > > On Mon, Mar 7, 2011 at 2:21 PM, Sean Anderson < > sean.william.anderson@gmail.com> wrote: > >> Hi, >> >> My team is trying to use image_transport compression in order to transfer >> large amounts of image data over our wireless network. >> >> We're using wireless N, but we have been unable to transfer for than 1 >> megabyte per sec over the network using ROS. >> >> When using "rostopic bw " in conjunction we have noticed that the >> bandwidth rises to 2 megabyte per sec (we've seen a max of 4MB/s with >> multiple tabs running the bw check) >> >> A colleague of mine noticed something about wpa_supplicant_node having a >> wireless 11b max bandwidth limiter, is this what is limiting our transfer >> rate? Does anyone know how to unlock the limit? >> >> Thanks so much, >> >> Sean Anderson >> >> _______________________________________________ >> ros-users mailing list >> ros-users@code.ros.org >> https://code.ros.org/mailman/listinfo/ros-users >> >> >