minor updates

CopterController/TCPexample/EchoServer.java

@@ -0,0 +1,51 @@
+/**
+ * 
+ */
+
+import java.lang.*;
+import java.io.*;
+import java.net.*;
+
+/**
+ * Echo server. if receives "DISCONNECT", will shut down server properly
+ */
+class EchoServer {
+   public static void main(String args[]) {
+      ServerSocket srvr;
+      Socket skt;
+      BufferedReader in;
+      PrintWriter out;
+
+      try {
+         System.out.print( "Setting up server\n" );
+         srvr = new ServerSocket( 51717 );
+         skt = srvr.accept();
+         System.out.print( "Server has connected!\n" );
+
+         in = new BufferedReader( new InputStreamReader( skt.getInputStream() ) );
+         out = new PrintWriter( skt.getOutputStream(), true);
+
+         while( true ) {
+            System.out.print( "waiting for message...\n" );
+            while( !in.ready() ) {}
+            String rx = in.readLine();
+            System.out.print( "message received: " + rx + "\n" );
+
+            if( rx.equals( "DISCONNECT" ) ) {
+               System.out.print( "disconnecting\n" );
+               break;
+            }
+
+            System.out.print("Sending string: '" + rx + "'\n");
+            out.println( rx );
+         }
+         out.close();
+         in.close();
+         skt.close();
+         srvr.close();
+      }
+      catch(Exception e) {
+         System.out.print("Whoops! It didn't work!\n");
+      }
+   }
+}

CopterController/TCPexample/Server.java

@@ -4,6 +4,7 @@ import java.net.*;
 
 /**
  * Echo server. if receives "DISCONNECT", will shut down server properly
+ * Used for testing GroundStation communications
  */
 class Server {
    public static void main(String args[]) {