Problem in making HTTP request using ethernet shield

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1

Output :
"Connecting
Connected

Disconnection"

The problem being the webpage data is not read. I tried different pages like .html, .php but still the same response.

What I could infer from this is that if(client.available()) is getting FALSE. Please help.

#include <SPI.h>
#include <Ethernet.h>
char c;
// 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[] ={ 127, 0, 0, 1}; // name address for Google (using DNS)

// Set the static IP address to use if the DHCP fails to assign
IPAddress ip(192, 168, 0, 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;

void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}

// start the Ethernet connection:
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
// try to congifure using IP address instead of DHCP:
Ethernet.begin(mac, ip);
}
// 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 /sooraj/index.php HTTP/1.1");
client.println("Host: localhost");
client.println("Connection: close");

} else {
// if 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();

// do nothing forevermore:
while (true);
}
}

2

localhost 127.0.0.1 is loopback name/address. the arduino doesn't run the server. use the real IP of the computer where the server runs

3

Juraj:
localhost 127.0.0.1 is loopback name/address. the arduino doesn't run the server. use the real IP of the computer where the server runs

I am a beginner to networking and arduino. Can you please explain. Did you mean that I should use the ipv4 address instead of local host ?

4

every device with TCP is localhost with address 127.0.0.1. It is the address or name for talking to it self over the TCP protocol loopback.

5

Juraj:
every device with TCP is localhost with address 127.0.0.1. It is the address or name for talking to it self over the TCP protocol loopback.

what change do I exactly have to make

6 
IPAddress server(192, 168, 0, ???); <- set your server's real IP address, not the "me, myself and I" address

replace
client.println("Host: localhost");
with
client.print("Host: ");
client.println(server);
7

Juraj:

IPAddress server(192, 168, 0, ???); <- set your server's real IP address, not the "me, myself and I" address

replace
client.println("Host: localhost");
with
client.print("Host: ");
client.println(server);

I tried it, made the respective changes, but still it shows connects and disconnects without reading the file. Can you please debug this problem, its really important for my project.

8

This is my code

#include <SPI.h>
#include <Ethernet.h>
char c;

char server[] = { 192, 168,0,100};

// Set the static IP address to use if the DHCP fails to assign
IPAddress ip(192, 168, 0, 177);

EthernetClient client;

void setup() {

Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}

// start the Ethernet connection:
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
// try to congifure using IP address instead of DHCP:
Ethernet.begin(mac, ip);
}
// 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 /sooraj/hello.html HTTP/1.1");
client.println("Host: ");
client.println(server);
client.println("Connection: close");
client.println();
} else {
// if you didn't get a connection to the server:
Serial.println("connection failed");
}
}

void loop() {

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();

// do nothing forevermore:
while (true);
}
}

The output is :

Connecting..

Connected
Disconnecting..

My project deadline is here and its very urgent. Please help

9

change client.println("Host: ") to client.print("Host: ")
and change if (client.available()) to while (client.available()) {

10

The SparkFun Ethernet Shield, particularly the Wiznet W5100, can be a power-hungry little beast. It’s recommended that you use a power supply that can source at least 400mA. Powering the shield over USB will work in most cases, though it wouldn’t hurt to power your Arduino via a 9V wall-wart.

The W5100’s hunger for power will cause it and the 3.3V regulator to heat up. This is normal, especially when the chip is doing a lot of work. They should never get untouchable hot, but they might get too-hot-to-comfortably-leave-your-finger-on-for-extended-periods hot.