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Updated ChatServer
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@ -12,7 +12,7 @@
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created 18 Dec 2009
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by David A. Mellis
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modified 10 August 2010
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modified 12 March 2012
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by Tom Igoe
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*/
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@ -23,14 +23,16 @@
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// Enter a MAC address and IP address for your controller below.
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// The IP address will be dependent on your local network.
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// gateway and subnet are optional:
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byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
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byte mac[] = {
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0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
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IPAddress ip(192,168,1, 177);
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IPAddress gateway(192,168,1, 1);
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IPAddress subnet(255, 255, 0, 0);
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// telnet defaults to port 23
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EthernetServer server(23);
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boolean gotAMessage = false; // whether or not you got a message from the client yet
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boolean alreadyConnected = false; // whether or not the client was connected previously
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void setup() {
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// initialize the ethernet device
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@ -39,25 +41,34 @@ void setup() {
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server.begin();
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// open the serial port
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Serial.begin(9600);
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Serial.print("Chat server address:");
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Serial.println(Ethernet.localIP());
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}
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void loop() {
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// wait for a new client:
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EthernetClient 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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if (!alreadyConnected) {
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// clead out the input buffer:
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client.flush();
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Serial.println("We have a new client");
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client.println("Hello, client!");
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gotAMessage = true;
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alreadyConnected = true;
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}
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if (client.available() > 0) {
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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.write(thisChar);
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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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