i tried this code to test my arduino mega 2560 and dfrobot ethernet shield, but the ip address that showed in serial monitor is different with the one that i typed in the code. how to solve this?
the ip that displayed in serial monitor is 16.227.107.172
#include <SPI.h>
#include <Ethernet.h>
/*
#define SS 53 //Gadgeteer PIN 6
#define nRST 46 //Gadgeteer PIN 4
#define nPWDN 45 //Gadgeteer PIN 5
#define nINT 2 //Gadgeteer PIN 3
*/
//define the interface: Dreamer MEGA X2 PORT
#define SS 10 //Gadgeteer PIN 6
#define nRST 8 //Gadgeteer PIN 4
#define nPWDN 9 //Gadgeteer PIN 5
#define nINT 3 //Gadgeteer PIN 3
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,0,117);
EthernetServer server(80);
void setup() {
pinMode(SS,OUTPUT); //Define the interfave :Dreamer MEGA X2 PORT Gadgeteer PIN 6 use SS
pinMode(nRST,OUTPUT);
pinMode(nPWDN,OUTPUT);
pinMode(nINT,INPUT);
digitalWrite(nPWDN,LOW); //enable power
digitalWrite(nRST,LOW); //Reset W5200
delay(10);
digitalWrite(nRST,HIGH);
delay(200); // wait W5200 work
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Ethernet.begin(mac, ip);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}
void loop() {
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connnection: close");
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
// add a meta refresh tag, so the browser pulls again every 5 seconds:
client.println("<meta http-equiv=\"refresh\" content=\"5\">");
// output the value of each analog input pin
for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
int sensorReading = analogRead(analogChannel);
client.print("analog input ");
client.print(analogChannel);
client.print(" is ");
client.print(sensorReading);
client.println("
");
}
client.println("</html>");
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
}
else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disonnected");
}
}