Grip issue when on FMS

[chrisL]

Hi Everyone,

We are competing at GTC and are having issues with grip updating the network tables.

We are running Grip on our laptop.
When we are tethered or wireless at our practice field we have no issues.

when we connect to the FMS we are receiving image back and are processing it properly everything appears to be working properly except when we look at the network table everything comes up as a rectangle. (no values being transferred)

We also tried deploying the Grip application to the RoboRio and had the same results

Has anyone had this issue or any solutions?

Thank you

[ThomasClark]

Originally Posted by chrisL

except when we look at the network table everything comes up as a rectangle. (no values being transferred)

I'm not sure I completely understand the problem. Could you post the program output or screenshots of what you're referring to?

[marshall]

Weird... Have you checked with the FTAs at the event?

[chrisL]

Originally Posted by marshall

Weird... Have you checked with the FTAs at the event?

Yes we have talked with the FTA and haven't been able to resolve the issue

[Peter Johnson]

Originally Posted by chrisL

Yes we have talked with the FTA and haven't been able to resolve the issue

What NT server address is GRIP set up to use? If you run GRIP from the command prompt, are there any NetworkTables messages printed to the command window? (you can do this by opening a cmd.exe window, changing directories to C:\Users\<name>\AppData\Local\GRIP\app, and running java -jar ui-<version>.jar). Have you opened a Network Table Viewer client and seeing if network table values are getting published there? (it sounds like it, but good to double-check)

[chrisL]

Originally Posted by Peter Johnson

What NT server address is GRIP set up to use? If you run GRIP from the command prompt, are there any NetworkTables messages printed to the command window? (you can do this by opening a cmd.exe window, changing directories to C:\Users\<name>\AppData\Local\GRIP\app, and running java -jar ui-<version>.jar). Have you opened a Network Table Viewer client and seeing if network table values are getting published there? (it sounds like it, but good to double-check)

Hi Peter,

When we go look at the network table when we are tethered we see all the values on the table.
When we look at it when we are connected to the FMS we receive a Null symbol.

[Peter Johnson]

Originally Posted by chrisL

When we go look at the network table when we are tethered we see all the values on the table.
When we look at it when we are connected to the FMS we receive a Null symbol.

Looking at it with what software (the code on your robot, LV Dashboard, Network Table Viewer)? What does "a null symbol" mean? The name/entry is present but its contents are blank or the entry doesn't exist?

[chrisL]

Originally Posted by Peter Johnson

Looking at it with what software (the code on your robot, LV Dashboard, Network Table Viewer)? What does "a null symbol" mean? The name/entry is present but its contents are blank or the entry doesn't exist?

Peter,

Correct i see the name of what its trying to publish. but where the value should be it shows a Rectangle.

[Peter Johnson]

Originally Posted by chrisL

Correct i see the name of what its trying to publish. but where the value should be it shows a Rectangle.

I'm thinking you're not seeing a rectangle but rather a pair of square brackets, e.g. an empty list ("[]"). Since you're seeing the name it's almost certainly not a NT issue, but rather GRIP isn't actually finding what you're looking for, and thus the output is an empty list. Does GRIP show that it's actually recognizing anything (just prior to the NT publish)?