Arduino + Wifly RN-XV + Processing

Sorry, previous post contains server code for the WiFly, but you need the Client code to connect to the Processing sketch (which is creating a server).

#include "WiFly.h"
#include "Credentials.h"

byte server[] = { 192,168,1,1 }; // Your PC IP

Client client(server, 1234);


void setup() {
  
  Serial.begin(9600);

  WiFly.begin();
  
  if (!WiFly.join(ssid, passphrase)) {
    Serial.println("Association failed.");
    while (1) {
      // Hang on failure.
    }
  }  

  Serial.println("connecting...");

  if (client.connect()) {
    Serial.println("connected");
    client.println("Hello World!\n");
    client.println();
  } else {
    Serial.println("connection failed");
  }
  
}

void loop() {
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }
  
  while (Serial.available() > 0) {
          char inChar = Serial.read();
            if (client.connected()) {
              client.print(inChar); 
            }
    }
  
  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();
    for(;;)
      ;
  }
}