Diferencia entre revisiones de «WebClientRepeating»

Revisión del 16:38 20 jun 2018

Web Client Repeating

Este ejemplo muestra cómo realizar solicitudes HTTP repetidas utilizando un escudo Ethernet. Este ejemplo utiliza DNS, asignando al cliente Ethernet una dirección MAC, una dirección IP y una dirección DNS. Se conecta a http://www.arduino.cc/latest.txt. El contenido de la página se puede ver a través de la ventana serie de Arduino.

</pre> /*

 Repeating Web client

This sketch connects to a a web server and makes a request
using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or
the Adafruit Ethernet shield, either one will work, as long as it's got
a Wiznet Ethernet module on board.

This example uses DNS, by assigning the Ethernet client with a MAC address,
IP address, and DNS address.

Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13

created 19 Apr 2012
by Tom Igoe
modified 21 Jan 2014
by Federico Vanzati

http://www.arduino.cc/en/Tutorial/WebClientRepeating
This code is in the public domain.

*/

1. include <SPI.h>
2. include <Ethernet.h>

// assign a MAC address for the ethernet controller. // fill in your address here: byte mac[] = {

 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED

}; // fill in an available IP address on your network here, // for manual configuration: IPAddress ip(192, 168, 1, 177);

// fill in your Domain Name Server address here: IPAddress myDns(1, 1, 1, 1);

// initialize the library instance: EthernetClient client;

char server[] = "www.arduino.cc"; //IPAddress server(64,131,82,241);

unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds const unsigned long postingInterval = 10L * 1000L; // delay between updates, in milliseconds // the "L" is needed to use long type numbers

void setup() {

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

 // give the ethernet module time to boot up:
 delay(1000);
 // start the Ethernet connection using a fixed IP address and DNS server:
 Ethernet.begin(mac, ip, myDns);
 // print the Ethernet board/shield's IP address:
 Serial.print("My IP address: ");
 Serial.println(Ethernet.localIP());

}

void loop() {

 // if there's incoming data from the net connection.
 // send it out the serial port.  This is for debugging
 // purposes only:
 if (client.available()) {
   char c = client.read();
   Serial.write(c);
 }

 // if ten seconds have passed since your last connection,
 // then connect again and send data:
 if (millis() - lastConnectionTime > postingInterval) {
   httpRequest();
 }

}

// this method makes a HTTP connection to the server: void httpRequest() {

 // close any connection before send a new request.
 // This will free the socket on the WiFi shield
 client.stop();

 // if there's a successful connection:
 if (client.connect(server, 80)) {
   Serial.println("connecting...");
   // send the HTTP GET request:
   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();

   // note the time that the connection was made:
   lastConnectionTime = millis();
 } else {
   // if you couldn't make a connection:
   Serial.println("connection failed");
 }

} </pre>