63 lines
1.7 KiB
Text
63 lines
1.7 KiB
Text
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/*
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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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Using an Arduino Wiznet Ethernet shield.
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Circuit:
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* Ethernet shield attached to pins 10, 11, 12, 13
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* Analog inputs attached to pins A0 through A5 (optional)
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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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by Tom Igoe
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*/
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#include <SPI.h>
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#include <Ethernet.h>
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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 ip[] = { 192,168,1, 177 };
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byte gateway[] = { 192,168,1, 1 };
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byte subnet[] = { 255, 255, 0, 0 };
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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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// initialize the ethernet device
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Ethernet.begin(mac, ip, gateway, subnet);
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// start listening for clients
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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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}
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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("We 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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