Added Wifi version of the chat server

WiFi/examples/WifiChatServer/WifiChatServer.ino

@@ -0,0 +1,95 @@
+/*
+ Chat  Server
+ 
+ A simple server that distributes any incoming messages to all
+ connected clients.  To use telnet to  your device's IP address and type.
+ You can see the client's input in the serial monitor as well.
+ 
+ This example is written for a network using WPA encryption. For 
+ WEP or WPA, change the Wifi.begin() call accordingly.
+ 
+ 
+ Circuit:
+ * WiFi shield attached
+ 
+ created 18 Dec 2009
+ by David A. Mellis
+ modified 4 Mar 2012
+ by Tom Igoe
+ 
+ */
+
+
+#include <SPI.h>
+#include <WiFi.h>
+char ssid[] = "tigoenet"; //  your network SSID (name) 
+char pass[] = "m30w-m30w";    // your network password (use for WPA, or use as key for WEP)
+
+
+//char ssid[] = "YourNetwork"; //  your network SSID (name) 
+//char pass[] = "password";    // your network password (use for WPA, or use as key for WEP)
+int keyIndex = 0;            // your network key Index number (needed only for WEP)
+
+int status = WL_IDLE_STATUS;
+
+WiFiServer server(23);
+
+boolean gotAMessage = false; // whether or not you got a message from the client yet
+
+void setup() {
+  // initialize serial:
+  Serial.begin(9600);
+  Serial.println("Attempting to connect to Wifi network...");
+  Serial.print("SSID: ");
+  Serial.println(ssid);
+
+  status = WiFi.begin(ssid, pass);
+  if ( status != WL_CONNECTED) { 
+    Serial.println("Couldn't get a wifi connection");
+    while(true);
+  } 
+  else {
+    server.begin();
+    Serial.print("Connected to wifi.");
+    printWifiStatus();
+  }
+}
+void loop() {
+  // wait for a new client:
+  WiFiClient client = server.available();
+
+  // when the client sends the first byte, say hello:
+  if (client) {
+    if (!gotAMessage) {
+      Serial.println("We have a new client");
+      client.println("Hello, client!"); 
+      gotAMessage = true;
+    }
+
+    // read the bytes incoming from the client:
+    char thisChar = client.read();
+    // echo the bytes back to the client:
+    server.write(thisChar);
+    // echo the bytes to the server as well:
+    Serial.print(thisChar);
+  }
+}
+
+
+void printWifiStatus() {
+  // print the SSID of the network you're attached to:
+  Serial.print("SSID: ");
+  Serial.println(WiFi.SSID());
+
+  // print your WiFi shield's IP address:
+  IPAddress ip = WiFi.localIP();
+  Serial.print("IP Address: ");
+  Serial.println(ip);
+
+  // print the received signal strength:
+  long rssi = WiFi.RSSI();
+  Serial.print("signal strength (RSSI):");
+  Serial.print(rssi);
+  Serial.println(" dBm");
+}
+