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/*
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Wifi Chat Server
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A simple server that distributes any incoming messages to all
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connected clients. To use telnet to your device's IP address and type.
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You can see the client's input in the serial monitor as well.
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This example obtains an IP address from the Wifi router and
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reports it.
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Circuit:
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* WiFi shield attached
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created 21 May 2011
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by Tom Igoe
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*/
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#include <SPI.h>
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#include <WiFi.h>
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#include <IPAddress.h>
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char ssid[] = "yourWifiNetwork";
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char pass[] = "seekrit-password";
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int status = WL_IDLE_STATUS;
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// telnet defaults to port 23
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Server server(23);
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boolean gotAMessage = false; // whether or not you got a message from the client yet
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void setup() {
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Serial.begin(9600);
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Serial.println("Attempting to connect to WPA network...");
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Serial.print("SSID: ");
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Serial.println(ssid);
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status = WiFi.begin(ssid, pass);
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if ( status == WL_CONNECTED) {
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// start listening for clients
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server.begin();
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Serial.println("Wifi shield is idle");
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// report the IP address:
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IPAddress myIPAddress = WiFi.localIp();
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Serial.print("My IP Address: ");
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Serial.print(WiFi.localIp()[3]);
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Serial.print(".");
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Serial.print(WiFi.localIp()[2]);
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Serial.print(".");
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Serial.print(WiFi.localIp()[1]);
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Serial.print(".");
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Serial.println(WiFi.localIp()[0]);
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} else {
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// if you didn't get a wifi connection, report what happened:
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switch (status) {
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case WL_IDLE_STATUS:
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Serial.println("Wifi connection succeeded");
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break;
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case WL_NO_SSID_AVAIL:
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Serial.println("No Wifi network available");
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break;
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case WL_CONNECT_FAILED:
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Serial.println("Wifi connection failed");
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break;
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case WL_CONNECTION_LOST:
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Serial.println("Wifi connection lost");
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break;
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case WL_DISCONNECTED:
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Serial.println("Wifi disconnected");
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break;
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}
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}
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}
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void loop() {
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// wait for a new client:
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Client client = server.available();
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// when the client sends the first byte, say hello:
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if (client) {
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if (!gotAMessage) {
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Serial.println("I have a new client");
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client.println("Hello, client!");
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gotAMessage = true;
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}
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// read the bytes incoming from the client:
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char thisChar = client.read();
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// echo the bytes back to the client:
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server.write(thisChar);
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// echo the bytes to the server as well:
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Serial.print(thisChar);
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}
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}
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