I'm trying to run the WebServer example below from the Arduino IDE using an Ethernet shield (Wiznet W5100) that is stacked on top of an Arduino Uno R3. The Ethernet shield is connected using an RJ45 cable to an Internet router. After uploading the code to the board, I see that the requested IP address (192.168.1.177) is printed to the console. The strange behavior that I'm facing here is that when I ping the IP address, I get a response indicating that the IP is reachable from my laptop. Also, I see the Tx, Rx LED lights blinking thereby indicating that the board is receiving the ping msgs and replying to them. This means that the board successfully received an IP address and is now connected to the LAN. However, when I try to access the same IP from the browser to receive the HTML page, no response is returned and the browser takes around 30 seconds displaying loading before returning site not reachable message. I tried different browsers from both the laptop and an iPhone connected to the same LAN with no luck in receiving the web page. Any hint as to what the problem could be is highly appreciated.
See below the code and a picture for the Ethernet shield during the experiment.
/*
Web Server
A simple web server that shows the value of the analog input pins.
using an Arduino Wiznet Ethernet shield.
Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
* Analog inputs attached to pins A0 through A5 (optional)
created 18 Dec 2009
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe
modified 02 Sept 2015
by Arturo Guadalupi
*/
#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, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 1, 177);
// 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() {
// 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 and the server:
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("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 5"); // refresh the page automatically every 5 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
// 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("<br />");
}
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 disconnected");
}
}
To those who come later here for the same problem, it appeared that there was an issue with the DHCP of the Internet router. It seems like my router's DHCP was not stable when providing IP addresses for devices connected through the Ethernet ports. I replaced the router and the problem went away.
Related
I have been trying to setup a web server using Arduino. I have an UNO and a HanRun HR91105A I got off the internet, and I am using a modified version of the WebServer example to test my code. It did in fact work at first. But after setting up port forwarding, the connection suddenly became unstable. It connects and works for a few minutes, then suddenly I can't even ping it. Trying to ping the Arduino results in request time out. Research online suggests 2 possibilities:
1.) All the RAM is used up
2.) Ethernet shield is faulty
Below is my code
#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[] = {
0x44, 0x00, 0x10, 0x20, 0x8C, 0x0A
};
IPAddress ip(192,168,1,90);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(8081);
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 and the server:
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("Connection: close");
client.println("Refresh: 2");
client.println();
client.println("<!DOCTYPE HTML>");
//-----------------Type in outputs below-------------------------------------
client.println("<html>");
client.print("Hello World!");
client.print("<p id='Header'>");
client.print("Sensor Data");
client.println("</p>");
client.print("<p id='Pressure'>");
client.print("Pressure:");
client.println("</p>");
client.print("<p id='Acceleration'>");
client.print("Acceleration:");
client.println("</p>");
client.println("<br /)");
client.println("</html>");
break;
//-----------------End of outputs--------------------------------------------
}
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 disconnected");
}
}
Additionally, the arduino does have a static IP, so I'm pretty sure it is not an issue of DHCP lease expiry.
I highly suspect that the shield is faulty as it gets very hot while in operation. Plus it IS a knockoff. But I can't dismiss the possibility that my coding is just inefficient as I am not very experienced. Any help would be appreciated. Thanks.
Your Arduino will opperate unpredictably when RAM is not enough.
In this code, there are many constant string. you should store those strings in FLASH memory to save RAM. In order to to so, use F() macro. For example.
client.println(F("HTTP/1.1 200 OK"));
If your program is big, I recommend to use the shield that equips an embedded web sever (e.g PHPoC Shield)
Hi I am absolute newbee using ENC28J60, I want to upload some data to my seerver (in php) :
I take a php hosting from 0fees and now I can send the data to my server using : http://ashutest123.0fees.us/dataupload1.php?data=somedata and check the uploaded list of data in the table as http://ashutest123.0fees.us/showdata.php ——— u can take a view yourself.
I wrote an arduino code (using Aruino Uno and ENC28J60 module from ebay.in) using UIPEthernet lib
#include <UIPEthernet.h> // Used for Ethernet
// **** ETHERNET SETTING ****
// Arduino Uno pins: 10 = CS, 11 = MOSI, 12 = MISO, 13 = SCK
// Ethernet MAC address - must be unique on your network - MAC Reads T4A001 in hex (unique in your network)
byte mac[] = { 0x54, 0x34, 0x41, 0x30, 0x30, 0x31 };
// For the rest we use DHCP (IP address and such)
EthernetClient client;
char server[] = "ashutest123.0fees.us"; // IP Adres (or name) of server to dump data to
int interval = 5000; // Wait between dumps
void setup() {
Serial.begin(9600);
Ethernet.begin(mac);
Serial.println("Tweaking4All.com - Temperature Drone - v2.0");
Serial.println("-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-\n");
Serial.print("IP Address : ");
Serial.println(Ethernet.localIP());
Serial.print("Subnet Mask : ");
Serial.println(Ethernet.subnetMask());
Serial.print("Default Gateway IP: ");
Serial.println(Ethernet.gatewayIP());
Serial.print("DNS Server IP : ");
Serial.println(Ethernet.dnsServerIP());
}
void loop() {
// if you get a connection, report back via serial:
if (client.connect(server, 80)) {
Serial.println("-> Connected");
// Make a HTTP request:
client.print( "GET /dataupload1.php?");
client.print("data=");
client.print( "somedata" );
client.println( " HTTP/1.1");
client.print( "Host: " );
client.println(server)
client.println( "Connection: close" );
client.println();
client.println();
client.stop();
}
else {
// you didn't get a connection to the server:
Serial.println("--> connection failed/n");
}
delay(interval);
}
when I run it in serial monitor it shows all ip, dns, gateway etc addresses as 0.0.0.0 ---- seems no dhcp abtained
then shows "connected"
no data goes to my server
Please help me I am in a need of it
Thanks in advance
You might want to try this example code, it might help you alot to understand your problem and where it come from.
#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[] = {
0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02
};
// 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);
// this check is only needed on the Leonardo:
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");
// no point in carrying on, so do nothing forevermore:
for (;;)
;
}
// print your local IP address:
printIPAddress();
}
void loop() {
switch (Ethernet.maintain())
{
case 1:
//renewed fail
Serial.println("Error: renewed fail");
break;
case 2:
//renewed success
Serial.println("Renewed success");
//print your local IP address:
printIPAddress();
break;
case 3:
//rebind fail
Serial.println("Error: rebind fail");
break;
case 4:
//rebind success
Serial.println("Rebind success");
//print your local IP address:
printIPAddress();
break;
default:
//nothing happened
break;
}
}
void printIPAddress()
{
Serial.print("My IP address: ");
for (byte thisByte = 0; thisByte < 4; thisByte++) {
// print the value of each byte of the IP address:
Serial.print(Ethernet.localIP()[thisByte], DEC);
Serial.print(".");
}
Serial.println();
}
Then I let you edit your code with your custom functions to get all informations you might need.
Note that if you set an hard-coded IP address even in a DHCP range it will be working.
V.
I've recently bought an Arduino ethernet shield but couldn't get it work.
I've tried to use the example's code but it did not work. I have even tried to get a static IP without DHCP and it's always the same problem .
I've used this code :
#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[] = { 0x90, 0xA2, 0xDA, 0x0F, 0xE1, 0xBF };
// 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[] = "www.google.com"; // name address for Google (using DNS)
// Set the static IP address to use if the DHCP fails to assign
IPAddress ip(192,168,1,10);
// 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 Leonardo only
}
// 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);
}
// 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 /search?q=arduino HTTP/1.1");
client.println("Host: www.google.com");
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();
// do nothing forevermore:
while(true);
}
}
and I got this answer:
Failed to configure Ethernet using DHCP
connecting...
connected
disconnecting.
How can I be sure that my ethernet shield is working correctly and how can I resolve this problem?
With a failed DHCP you don't have DNS address to resolve "www.google.com".
Modify your code like this and try again :
IPAddress server(74,125,232,128);
//char server[] = "www.google.com";
I have recently bought an arduino wifi shield(Atmal chip 32UC3A1512-U), which I connected with
my Arduino Mega ADK R3 board)...It is getting connected to my wifi network, But when I run the
SimpleWebServer Example provided in the library to on/off the LED is not working. The code is given below...
#include <SPI.h>
#include <WiFi.h>
char ssid[] = "belkin.E33"; // your network SSID (name)
char pass[] = "abc123cde456"; // your network password
int keyIndex = 0; // your network key Index number (needed only for WEP)
int status = WL_IDLE_STATUS;
WiFiServer server(80);
void setup() {
Serial.begin(9600); // initialize serial communication
pinMode(9, OUTPUT); // set the LED pin mode
// check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
while(true); // don't continue
}
// attempt to connect to Wifi network:
while ( status != WL_CONNECTED) {
Serial.print("Attempting to connect to Network named: ");
Serial.println(ssid); // print the network name (SSID);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
status = WiFi.begin(ssid, pass);
// wait 10 seconds for connection:
delay(10000);
}
server.begin(); // start the web server on port 80
printWifiStatus(); // you're connected now, so print out the status
}
void loop() {
WiFiClient client = server.available(); // listen for incoming clients
if (client) { // if you get a client,
Serial.println("new client"); // print a message out the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println();
// the content of the HTTP response follows the header:
client.print("Click here turn the LED on pin 9 on<br>");
client.print("Click here turn the LED on pin 9 off<br>");
// The HTTP response ends with another blank line:
client.println();
// break out of the while loop:
break;
}
else { // if you got a newline, then clear currentLine:
currentLine = "";
}
}
else if (c != '\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
// Check to see if the client request was "GET /H" or "GET /L":
if (currentLine.endsWith("GET /H")) {
digitalWrite(9, HIGH); // GET /H turns the LED on
}
if (currentLine.endsWith("GET /L")) {
digitalWrite(9, LOW); // GET /L turns the LED off
}
}
}
// close the connection:
client.stop();
Serial.println("client disonnected");
}
}
void printWifiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your WiFi shield's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
// print where to go in a browser:
Serial.print("To see this page in action, open a browser to http://");
Serial.println(ip);
}
The result that I am getting in the serial monitor is
Attempting to connect to Network named: belkin.E33
SSID: belkin.E33
IP Address: 192.168.2.5
strength (RSSI):-56 dBm
To see this page in action, open a browser to http://192.168.2.5
But When I am opening the browser with the specified IP address, It is showing
Could not Connect to 192.168.2.5
I have tried this in mozilla and chrome from my ubuntu machine...also tried from some other machines in the same network but with the same result. But when I am pinging to 192.168.2.5 it is pinging...What went wrong??? . My friend adviced to change the firmware...Is it an issue,bcas as told earlier simple examples for establishing the connection are working...Please guide me
I've got the same problem after upgrading Arduino IDE to lastest version (v2) from v1.0.8 which is doing fine with the wifi shield tests (client and server).
Going to try the nightly build now and see if it's fixed.
Edit: Yeap, Nightly build solves this issue.
I have a brand new Ethernet shield on Arduino Uno and have worked through many (non-Ethernet) examples without any issues, until I tried to use the Ethernet shield.
Using the provided EthernetClient example, I get a connection failed. The return code is -5 (and I could only find answers for -4 through 1).
/*
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
Modified 9 Apr 2012
by David A. Mellis
*/
#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[] = {0x90, 0xA2, 0xDA, 0x0D, 0x4E, 0x71 };;
char server[] = "google.com"; // Google
// 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 Leonardo only
}
// 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:
for(;;)
;
}
// Give the Ethernet shield a second to initialize:
delay(1000);
Serial.println("connecting...");
Serial.println("Obtaining local IP address");
IPAddress myIPAddress = Ethernet.localIP();
Serial.println(myIPAddress);
// if you get a connection, report back via serial:
int ret = client.connect(server, 80);
if (ret == 1) {
Serial.println("connected");
// Make a HTTP request:
client.println("GET /search?q=arduino HTTP/1.0");
client.println();
}
else {
// kf you didn't get a connection to the server:
Serial.println("Connection failed");
Serial.println(ret);
Serial.println(client.status());
}
}
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:
for(;;)
;
}
}
The results are always:
Connecting...
Obtaining local IP address
192.168.0.7
Connection failed
-5
0
disconnecting.
Not sure why this helped, but adding a delay after the Serial is intialized, before beginning Ethernet, and also increasing the delay before using Ethernet seemed to work.
/*
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
modified 9 Apr 2012
by David A. Mellis
*/
#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[] = {0x90, 0xA2, 0xDA, 0x0D, 0x4E, 0x71 };;
char server[] = "google.com"; // Google
// 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 Leonardo only
}
delay(5000);
// 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:
for(;;)
;
}
// give the Ethernet shield a second to initialize:
delay(5000);
Serial.println("connecting...");
Serial.println("Obtaining local IP");
IPAddress myIPAddress = Ethernet.localIP();
Serial.println(myIPAddress);
// if you get a connection, report back via serial:
int ret = client.connect(server, 80);
if (ret == 1) {
Serial.println("connected");
// Make a HTTP request:
client.println("GET /search?q=arduino HTTP/1.0");
client.println();
}
else {
// kf you didn't get a connection to the server:
Serial.println("connection failed");
Serial.println(ret);
Serial.println(client.status());
}
}
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:
for(;;)
;
}
}
That Google IP address (173.194.33.104) is not valid now. Try to use 74.125.226.242 instead:
IPAddress server(74,125,226,242); // Google
And before your try it on Arduino, ensure your can open this IP address in your browser:
http://74.125.226.242
Try defining the server IP address as it is shown on the Arduino Reference Page:
byte server[] = { 64, 233, 187, 99 }; // Google
Try a couple different example programs. There have been some revisions with the move to IDE 1.0 that could affect compatibility.