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9eaea4205d
According to #3786 removed the reference to Leonardo only in while(!Serial) of the examples. Changed in in "wait for serial port to connect. Needed for native USB port only"
93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
/*
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DHCP 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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THis version attempts to get an IP address using DHCP
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Circuit:
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* Ethernet shield attached to pins 10, 11, 12, 13
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created 21 May 2011
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modified 9 Apr 2012
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by Tom Igoe
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modified 02 Sept 2015
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by Arturo Guadalupi
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Based on ChatServer example by David A. Mellis
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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[] = {
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0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02
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};
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IPAddress ip(192, 168, 1, 177);
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IPAddress myDns(192,168,1, 1);
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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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void setup() {
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// Open serial communications and wait for port to open:
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Serial.begin(9600);
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// this check is only needed on the Leonardo:
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while (!Serial) {
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; // wait for serial port to connect. Needed for native USB port only
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}
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// start the Ethernet connection:
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Serial.println("Trying to get an IP address using DHCP");
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if (Ethernet.begin(mac) == 0) {
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Serial.println("Failed to configure Ethernet using DHCP");
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// initialize the ethernet device not using DHCP:
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Ethernet.begin(mac, ip, myDns, gateway, subnet);
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}
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// print your local IP address:
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Serial.print("My IP address: ");
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ip = Ethernet.localIP();
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for (byte thisByte = 0; thisByte < 4; thisByte++) {
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// print the value of each byte of the IP address:
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Serial.print(ip[thisByte], DEC);
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Serial.print(".");
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}
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Serial.println();
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// start listening for clients
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server.begin();
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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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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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Ethernet.maintain();
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}
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}
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