You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.4 KiB
88 lines
2.4 KiB
/*
|
|
DHCP 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.
|
|
Using an Arduino Wiznet Ethernet shield.
|
|
|
|
THis version attempts to get an IP address using DHCP
|
|
|
|
Circuit:
|
|
* Ethernet shield attached to pins 10, 11, 12, 13
|
|
|
|
created 21 May 2011
|
|
modified 9 Apr 2012
|
|
by Tom Igoe
|
|
Based on ChatServer example by David A. Mellis
|
|
|
|
*/
|
|
|
|
#include <SPI.h>
|
|
#include <Ethernet2.h>
|
|
|
|
// Enter a MAC address and IP address for your controller below.
|
|
// The IP address will be dependent on your local network.
|
|
// gateway and subnet are optional:
|
|
byte mac[] = {
|
|
0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02
|
|
};
|
|
IPAddress ip(192, 168, 1, 177);
|
|
IPAddress gateway(192, 168, 1, 1);
|
|
IPAddress subnet(255, 255, 0, 0);
|
|
|
|
// telnet defaults to port 23
|
|
EthernetServer server(23);
|
|
boolean gotAMessage = false; // whether or not you got a message from the client yet
|
|
|
|
void setup() {
|
|
// Open serial communications and wait for port to open:
|
|
Serial.begin(9600);
|
|
// this check is only needed on the Leonardo:
|
|
while (!Serial) {
|
|
; // wait for serial port to connect. Needed for Leonardo only
|
|
}
|
|
|
|
|
|
// start the Ethernet connection:
|
|
Serial.println("Trying to get an IP address using DHCP");
|
|
if (Ethernet.begin(mac) == 0) {
|
|
Serial.println("Failed to configure Ethernet using DHCP");
|
|
// initialize the ethernet device not using DHCP:
|
|
Ethernet.begin(mac, ip, gateway, subnet);
|
|
}
|
|
// print your local IP address:
|
|
Serial.print("My IP address: ");
|
|
ip = Ethernet.localIP();
|
|
for (byte thisByte = 0; thisByte < 4; thisByte++) {
|
|
// print the value of each byte of the IP address:
|
|
Serial.print(ip[thisByte], DEC);
|
|
Serial.print(".");
|
|
}
|
|
Serial.println();
|
|
// start listening for clients
|
|
server.begin();
|
|
|
|
}
|
|
|
|
void loop() {
|
|
// wait for a new client:
|
|
EthernetClient 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);
|
|
}
|
|
}
|
|
|
|
|