How to test 7Mb/s?

[fovea1959]

I thought at the kickoff they told us we would be restricted to 7Mb/s between the DS and robot, and I *thought* I heard that we would have a way to test our DS/bot communcations at that data rate before we got to the competition.

I can't find anything on this: is there a way to artificially restrict the bandwidth between the DS and the bot to make sure we don't get surprised at competition?

[Greg McKaskle]

I believe I heard that it is possible to program the DLink router to impose similar QOS and usage limits. But I have never done it and may be mistaken.

The default dashboard displays the camera bandwidth below the image along with a colored LED. That number is not the actual transmission, but is the data payload, so it is an underestimate, but is a reasonable estimator. The robot control/status is right at 1mbps, so if the camera is around 6, you should be fine.

Greg McKaskle

[rsisk]

Page 32 of the DLInK user manual has instructions for sett QOS

http://www.dlink.com/us/en/support/p...nual_EN_US.pdf

[Joe Ross]

Originally Posted by Greg McKaskle

I believe I heard that it is possible to program the DLink router to impose similar QOS and usage limits. But I have never done it and may be mistaken.

The radio programming tool sets the bandwidth limits, as well as QOS automatically.

Additionally, the LabVIEW dashboard shows the camera bandwidth, which is the largest bandwidth hog. Additionally, the LabVIEW dashboard variables tab will show the bandwidth that NetworkTables is using. If you are using other forms of network communication, you'd need to measure those yourself.

[David++]

There is a quick guide on ScreenSteps about measuring your bandwidth usage with the performance monitor built-in to Windows 7 or Wireshark.

[inkspell4]

Originally Posted by David++

There is a quick guide on ScreenSteps about measuring your bandwidth usage with the performance monitor built-in to Windows 7 or Wireshark.

For some reason our laptop does bot have "Network Interface" listed on the menu and wireshark is not an option as our computers belong to the school system.

Are there any other ideas or any ideas on how to fix the problem ?