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Unread 03-11-2014, 13:22
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Re: Vision: what's state of the art in FRC?

Quote:
Originally Posted by Greg McKaskle View Post
The LEDs are based on the static guidelines. They are in effect with and without a field so hopefully a team will identify a 15Mbps camera before they compete.

...

The LEDs and Mbps values are there even when not on the field, so hopefully most teams are prepared. The charts are live on the DS, but not in the front tab. Yes, these metrics are mostly for analysis following a match. My time machine is on the fritz.
I think the issue is more that teams get close enough to the bandwidth that they think should work but not quite below the limit sufficiently. Such that they get some operation but then get cut off here and there. Sometimes they say they were fine at the last competition but then get to another and they are not fine (when in fact they were always skirting with this issue). Compression makes this a little more complicated because the bandwidth of the video changes slightly based on what is being shown and that changes all the time.

So, if a team does not look at the logs, they might think they dragged down the battery or had a software problem. This misleads them into thinking they are not having this issue. Also some teams change out the robot operators so they don't think to go back and look at these logs which would still show the lost packets.

In fairness this is a tool teams should leverage more often.

(We could solve the whole real time video issue if we could just travel forward in time and record the match then play it back in the past. )

Quote:
Originally Posted by Greg McKaskle View Post
The field is typically using bonded channels, but for a portion of 2013 it didn't, and in some venues it may not be feasible. Even without bonding, the field "should" have enough bandwidth to run a match with all robots using the recommended bandwidth. But some venues are challenging.
True enough. Increasingly the 5GHz WiFi spectrum is being gobbled up by schools and other mobile devices capable of using it. We can't always clear the air to use what we might like.

Quote:
Originally Posted by Greg McKaskle View Post
If this feature does not yet exist could I ask for it to be implemented?

*** Too many pronouns, what feature is being requested?
At the time I wrote that I was wondering if we could get a button that would send the log we have open to a central server somewhere, like perhaps something linked to NI Parkway. Though the more I thought about it: there might not be Internet access to their driver's station at the competition (usually there is...but not always).

So I think I will modify my feature request based on what I just wrote. Can we get a button in the DS log viewer that will compress and transfer all the current match logs (or at least the currently displayed log in the DS log viewer) to a USB flash drive? So that I can just plug in and take all their logs with me by clicking that button? (If this is too much trouble I can write a little bit of code to achieve this and put it on a USB flash drive. I usually have several with me when I CSA anyway for all the documents and updates).

Last edited by techhelpbb : 03-11-2014 at 13:28.