We got Sockets working

[sand500]

http://www.youtube.com/watch?v=N0xvqxRKCKg

What we have is the computer with the driver station has the PS3 controller connected to it. We then get input from the left stick of the joystick to the CRIO with the regular Joystick Class. Now to send that to the 2nd computer, we use java sockets with the CRIO running the socket server code and the computer running the client socket code. So far, we are just experimenting with sockets with last years robot.

[Patrickwhite]

Neat!

Your custom dashboard looks a lot like the Smart Dashboard - for what reasons did you decide to make your own, instead of using the Smart Dashboard?

[neal]

Is that possible to do with SmartDashboard? I'd really love to get those bars for joysticks and the Gyro thing as well!

[theNerd]

Wow. I've been trying to lean how to do that in LabView. Since I switched over to java I still wonder how to do that. Could you explain in detail how you got the comms to work?

[Patrickwhite]

Absolutely that's possible with the SmartDashboard.

The SmartDashboard package is edu.wpi.first.wpilibj.smartdashboard.

Data sent has a name and a value. The name is used to tie a set of values to a certain widget - if you send "Heading" as 90, then set up a widget to listen to that key, then subsequent sendings of "Heading" will go straight to that widget.

You can send booleans, ints, doubles, and Strings, as well as any class that implements SmartDashboardData. You can even make your own SmartDashboardData-implementing class, though doing so is a bit complicated.

You can make your own widget to display data received any way you like.

[neal]

Originally Posted by Patrickwhite

Absolutely that's possible with the SmartDashboard.

The SmartDashboard package is edu.wpi.first.wpilibj.smartdashboard.

Data sent has a name and a value. The name is used to tie a set of values to a certain widget - if you send "Heading" as 90, then set up a widget to listen to that key, then subsequent sendings of "Heading" will go straight to that widget.

You can send booleans, ints, doubles, and Strings, as well as any class that implements SmartDashboardData. You can even make your own SmartDashboardData-implementing class, though doing so is a bit complicated.

Oh, cool! I was wondering what putint() and other methods did. But I won't have access to the robot until Saturday. Glad you explained!

How do you make the widgets, though?

[Patrickwhite]

http://firstforge.wpi.edu/sf/wiki/do...iki/Extensions

Great set of tutorials on how to write a widget.

The SmartDashboard itself can be downloaded from the same project, under File Releases.

[sand500]

Originally Posted by Patrickwhite

Neat!

Your custom dashboard looks a lot like the Smart Dashboard - for what reasons did you decide to make your own, instead of using the Smart Dashboard?

Well we are still messing around at this point, but based on how our bot turns out, we will make our Dashboard to fit the bot.

[ProgrammerMatt]

Mind sharing how to use sockets im trying to send my vision tracking data to our robot with no luck

[Sunstroke]

Originally Posted by ProgrammerMatt

Mind sharing how to use sockets im trying to send my vision tracking data to our robot with no luck

Might I suggest looking at this thread? It takes away all the little obnoxious parts of sockets and does it for you.

[Sunstroke]

Originally Posted by ProgrammerMatt

Mind sharing how to use sockets im trying to send my vision tracking data to our robot with no luck

I would consider using the code provided by WPI.

[ProgrammerMatt]

Originally Posted by Sunstroke

I would consider using the code provided by WPI.

The problem with that is i have a program for vision tracking and it sends out TCP data on its own...

[derekwhite]

Here's one quick example:

// connect to “echo” server:
SocketConnection sc = (SocketConnection) Connector.open("socket://host.com:79");
InputStream is = sc.openInputStream();
OutputStream os = sc.openOutputStream();

os.write("Hello\r\n".getBytes()); 
int ch = 0; 
while(ch != -1) {
   ch = is.read(); 
}
sc.close();

[derekwhite]

More examples here:

http://developers.sun.com/mobility/m.../midp2network/

[ProgrammerMatt]

This is more for derek but when i send data to my robot using this code http://pastebin.com/x2KZepNR that i made i get a thread error and null pointer any ideas?
here is error

[cRIO] Default disabled() method running, consider providing your own
[cRIO] Uncaught exception in Thread.run():
[cRIO]     on thread Thread-6
[cRIO] java.lang.NullPointerException
[cRIO]     at edu.wpi.first.wpilibj.templates.Socket.run(Socket.java:40)
[cRIO]     in virtual method #47 of com.sun.squawk.VMThread(bci=42)
[cRIO]     in static method #3 of com.sun.squawk.VM(bci=6)