Hey All,
I've been struggling with this one for a while now and I could really use some help.
I have a simple sketch that is supposed to return the temperature outside and put it on an lcd.
The ethernet shield works with the httpclient example and has worked with both the yahoo api and the Weather Underground API.
The problem I have is that it won't work anymore. Take an identical piece of code, swap in a different server (e.g. www.google.com) and it connects and you get a response, but no connection from the two api's.
The API's are both up and running and the information is right because I can telnet to them just fine.
Is it possible that they have both blocked the mac address of the arduino somehow? Any other ideas? Thanks in advance.
Joe
/*
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>
#include <LiquidCrystal.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,0x4A,0x03};
// 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(10,0,1,100);
LiquidCrystal lcd(3, 4, 5, 6, 7, 8);
// 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);
lcd.begin(16, 2);
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...");
lcd.setCursor( 0, 0);
lcd.print("connecting");
lcd.setCursor(0, 1);
lcd.print(Ethernet.localIP());
// if you get a connection, report back via serial:
if (client.connect(server, 80)) {
Serial.println("connected");
lcd.setCursor( 0, 0);
lcd.print("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);
lcd.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);
}
}
