Comments on: Getting hands on Arduino Ethernet Shield

By: ElectronicsBuilder

ElectronicsBuilder — Sun, 22 Jan 2012 17:20:38 +0000

Wiznet W5100 may be a good chip but the price difference between a shield based on it and a shield based on ENC28J60 chip with SPI interface is very significant, even more so considering that MCU-based hobby projects tend to be on a very tight budget. In fact, by far the lowest cost Ethernet implementation for an Arduino would be to use not a shield but a separate controller board with 0.1″ pin headers which is still very easy to hook up to the Arduino but even easier to position conveniently in the project box. Besides, not being bogged down by the Arduino shield’s weird PCB shape that requires routing, I’ve seen eBay sellers from faraway East places drop the price down to $8-$12 for standalone ENC28J60-based Ethernet controllers. If you can wait 3-4 weeks for it to arrive from China, this is the way to go.

By: 2Rhon

2Rhon — Tue, 10 Jan 2012 10:53:17 +0000

hello, i am having a problem here using the code.. when i verify the code it says that server class has been renamed. Can I use these codes without a router? Is it possible PC –> arduino + ethernet shield? Im new into this. pls help . thank you very much.

By: camlito

camlito — Mon, 06 Jun 2011 23:05:04 +0000

dammit, beginner’s trap I’ll try again:

if (LEDON == true) {
client.println(” LED “);
client.println(” LED “);
client.println(“”); }

else if (LEDON == false) {
client.println(” LED “);
client.println(” LED “);
client.println(“”); }

if this does not work, I’ll try to know how to post a code window here and stop bothering you:P

regards.

By: camlito

camlito — Mon, 06 Jun 2011 22:59:08 +0000

Thank you a lot scienceprog!!

Excuse me for my bad english

Greetings from Colombia too

I’ve just made a slight modification and used a second button to make the LED turn off in a quirky way, because the LED does not turn off with FF4 using Mac OSX and lubuntu 11.04 with the main example you provided…

I’m just a beginner, I also apologize because I don’t know how to elaborate a code tag here, so just made this change:

if (LEDON == true) {
client.println(“LED”);
client.println(“LED”);
client.println(“”); }

else if (LEDON == false) {
client.println(“LED”);
client.println(“LED”);
client.println(“”); }

It’s not perfect, sometimes the checkbox doesn’t work the other way around, and if you use more than one networked computer, and don’t let the server a little time to process the request, the page is shown in a weird way. When one user pushes the LED button on, and some other user wants to put that LED off he/she has to push the submit button twice…

The example code is simple and understandable to tinker with, thanks a lot.

By: Xavier

Xavier — Wed, 01 Jun 2011 17:46:40 +0000

@polidano – you don’t have to worry about the mac address. it is some random value that was assigned. it’s not really important to change. the ip address is also a random value YOU SET so that you can access the contents on the arduino from your web browser. that is the only thing you really may need to change if the software built-in to your router already uses the 192.168.1.1 address. hope that helps.

By: polidano

polidano — Sat, 14 May 2011 21:23:30 +0000

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address
byte ip[] = { 192, 168, 1, 110 }; // ip in lan
byte gateway[] = { 192, 168, 1, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask

byte mac: is the number on the sticker on the thernet shield??
byte ip: is my ip address which i can find on my laptop?
byte gateway and byte subnet.. i still didt understand what they are?
if please anyone can help me

By: ertro

ertro — Mon, 09 May 2011 13:40:42 +0000

Can someone explain to me, if set readString=”?”; then my Firefox works and my Chromium don’t, and if I set readString=”"; then my Chromium works and not FF.

Chromium:(readString=”") LED off – monitor returned:
GET /? HTTP/1.1
GET /favicon.ico HTTP/1.1
led ON:
GET /?L=1 HTTP/1.1
GET /favicon.ico HTTP/1.1

Firefox:(readString=”?”) LED off – monitor returned:
GET / HTTP/1.1
led ON:
GET /?L=1 HTTP/1.1

By: ertro

ertro — Mon, 09 May 2011 11:11:34 +0000

Hi,
I am using Ubuntu 10.10 and Chromium 11.xx and it works with a LED in Dpin4. I can only light on in Firefox 3.6.17 .

One of my friends tried from an Android Phone and it worked for him too. But not in IE? and FF?

By: Xavier

Xavier — Tue, 26 Apr 2011 15:43:02 +0000

Hi,

This has been a very valuable resource for my senior design project that I have worked on all semester and I will be documenting and giving you credit accordingly . It gave me a great start to learn how to build a web interface using the ethernet field.

However, the page “hangs” and doesn’t load when I plug it up to an actual relay. Every loads fine when the relay is not plugged in. I am using the KTA-223 “relayduino” (http://www.sparkfun.com/products/9526) to control light bulbs via the same concept. Any help would be great.

By: Akshay

Akshay — Thu, 21 Apr 2011 01:54:27 +0000

In this project is arduino acting like web server or client or both. Cuz not only its uploading html page requests (serving) but also receiving info of whether LED is on or off (client)
Am i right?