Hi guys!
I have a mega 2560 and an ethernet shield W5100 (http://litbimg1.rightinthebox.com/images/384x384/201501/yzwwed1421740712630.jpg).
I have problem with ethernet shield. I'm using WebServer example. When I put ip address into the address bar, I can't get the web page from the first try. I have to refresh page several times to get results.
Also, when I restart Mega, LED13 on the ethernet shield sometimes turns on, and when I restart Mega again, the LED13 turns off.
Please help. Thanks!
#include <SPI.h>
#include <Ethernet.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xA2, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 1, 55);
byte gateway[] = { 192, 168, 1, 1 };
// the subnet:
byte subnet[] = { 255, 255, 255, 0 };
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
void setup() {
pinMode(4, OUTPUT);
digitalWrite(4, HIGH);
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip, gateway, subnet);
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("Connection: close"); // the connection will be closed after completion of the response
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<p>Hi!</p>");
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
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
PING 192.168.1.55 (192.168.1.55) 56(84) bytes of data.
64 bytes from 192.168.1.55: icmp_seq=1 ttl=128 time=0.093 ms
64 bytes from 192.168.1.55: icmp_seq=3 ttl=128 time=0.098 ms
64 bytes from 192.168.1.55: icmp_seq=4 ttl=128 time=0.097 ms
64 bytes from 192.168.1.55: icmp_seq=7 ttl=128 time=0.100 ms
64 bytes from 192.168.1.55: icmp_seq=8 ttl=128 time=0.095 ms
64 bytes from 192.168.1.55: icmp_seq=11 ttl=128 time=0.099 ms
64 bytes from 192.168.1.55: icmp_seq=13 ttl=128 time=0.101 ms
64 bytes from 192.168.1.55: icmp_seq=14 ttl=128 time=0.095 ms
64 bytes from 192.168.1.55: icmp_seq=15 ttl=128 time=0.094 ms
^C
--- 192.168.1.55 ping statistics ---
15 packets transmitted, 9 received, 40% packet loss, time 13999ms
rtt min/avg/max/mdev = 0.093/0.096/0.101/0.013 ms
