Hi guys
I am trying to use the Ethernet Client example. I first created a bridge between wifi and ethernet on laptop and tried it. It is only working sometimes. Then I connected my mega board with ethernet shield to a router and it is also working only some times.
I get the following outputs with the code. (Please note that you need to press ‘a’ in serial monitor to start the program).
Chandra
/*
Web client
This sketch connects to a website (http://www.google.com)
using an Arduino Wiznet Ethernet shield.
Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
created 18 Dec 2009
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe, based on work by Adrian McEwen
*/
#include <SPI.h>
#include <Ethernet.h>
// Enter a MAC address for your controller below.
// Newer Ethernet shields have a MAC address printed on a sticker on the shield
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
//IPAddress server(74,125,232,128); // numeric IP for Google (no DNS)
//char server[] = "http://www.mcprakash.netau.net"; // name address for Google (using DNS)
char server[] = "www.arduino.cc";
// Set the static IP address to use if the DHCP fails to assign
IPAddress ip(192, 168, 1, 177);
// Initialize the Ethernet client library
// with the IP address and port of the server
// that you want to connect to (port 80 is default for HTTP):
EthernetClient client;
char ch;
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(115200);
while(1)
{
if(Serial.available()>0)
{
ch=Serial.read();
if(ch=='a')
break;
}
}
// start the Ethernet connection:
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
// no point in carrying on, so do nothing forevermore:
// try to congifure using IP address instead of DHCP:
Ethernet.begin(mac, ip);
}
Serial.print("Arduino IP is:");
Serial.println(Ethernet.localIP());
// give the Ethernet shield a second to initialize:
delay(1000);
Serial.println("connecting...");
// if you get a connection, report back via serial:
if (client.connect(server, 80)) {
Serial.println("connected");
// Make a HTTP request:
/*
client.println("GET /reemo_conf.txt HTTP/1.0");
client.println("Host: http://mcprakash.netau.net/");
//client.println("User-Agent: arduino-ethernet");
client.println("Connection: close");
client.println();
*/
client.println("GET /latest.txt HTTP/1.1");
client.println("Host: www.arduino.cc");
client.println("User-Agent: arduino-ethernet");
client.println("Connection: close");
client.println();
}
else {
// kf you didn't get a connection to the server:
Serial.println("connection failed");
}
}
void loop()
{
// if there are incoming bytes available
// from the server, read them and print them:
if (client.available()) {
char c = client.read();
Serial.print(c);
}
// if the server's disconnected, stop the client:
if (!client.connected()) {
Serial.println();
Serial.println("disconnecting.");
client.stop();
while(1)
{
if(Serial.available()>0)
{
Serial.println("Exiting");
exit(0);
}
}
}
}
OUTPUT
Connected
Arduino IP is:192.168.1.77
connecting...
connected
HTTP/1.1 200 OK
Server: nginx/1.4.2
Content-Type: text/plain
Last-Modified: Wed, 02 Oct 2013 13:46:55 GMT
ETag: "524c23cf-5"
Content-Length: 5
Accept-Ranges: bytes
Date: Tue, 19 Aug 2014 16:43:14 GMT
X-Varnish: 1831322934
Age: 0
Via: 1.1 varnish
Connection: close
X-Cache: MISS
X-URL: /latest.txt
0105
disconnecting.
Connected but did not get the file
Arduino IP is:192.168.1.77
connecting...
connected
disconnecting.
Not Connected
Arduino IP is:192.168.1.77
connecting...
connection failed
disconnecting.