Mid-Match hang due to smart dashboard?

[virtuald]

See this thread. You can download an official update using the link on that thread.

[DjScribbles]

Originally Posted by virtuald

See this thread. You can download an official update using the link on that thread.

That thread is about an issue that is different from what I've described; it could be related, but it didn't really seem to be.

From that thread:

The TL;DR is basically this: if you are connected via SmartDashboard, and you disconnect the connected computer's wireless while the robot is writing a value to the SmartDashboard, the robot may hang until the write times out.. which can be a few minutes.

[virtuald]

Originally Posted by DjScribbles

That thread is about an issue that is different from what I've described; it could be related, but it didn't really seem to be.

The SmartDashboard could become unsynchronized for any number of reasons, and cause writes to fail. If they do fail, then without the patch you will lose control of your robot. SmartDashboard uses a separate communications channel than the DS comms, so just because the DS didn't lose any packets doesn't mean SmartDashboard packets were not lost.

The fact that removing SmartDashboard from your code solved the problem indicates a high probability that you are affected by the issue, even if the cause isn't exactly the same.

[MrRoboSteve]

Based on the description of the issue, I agree with the other posters that you should take the patch.

Can you post DS Log Viewer snips of matches where the failure occurred? Very low CPU usage would point to this as the root cause.

[DjScribbles]

To clarify, I fully intend to apply the patch.

I simply saw a different set of symptoms than those described in the other thread; and I wanted to ensure that if the problem I've encountered is a separate issue, it is treated as such (which is why I acknowledged the thread in my OP).

I will try to get our DS logs from that match to post tonight.

[Joe Ross]

Did you have any more problems after applying the patch?

[DjScribbles]

We ran smart dashboard throughout the Lansing district event (14 matches) without removing any of our "excessive" PutNumber readouts, and did not encounter a problem on the field.

So I am fairly confident the patch fixed our issue, I'll report back if I see any sign of the issue again.