| tags | author | title | description | |
|---|---|---|---|---|
|
Arduino |
Arduino Yún HTTP Client Console |
Create a simple client that downloads a webpage and prints it to the serial monitor via WiFi using Console. |
This example for a Yún device shows how create a basic HTTP client that connects to the Internet and downloads content. In this case, you'll connect to the Arduino website and download a version of the logo as ASCII text. This version uses Console and shows the output on your Arduino Software (IDE) Console through a WiFi connection and not the USB one.
Select the IP port as connection to your board and open the Serial Monitor in the IDE once you've programmed the board.
-
Yún board or shield
-
a wireless network connection to the internet
There is no circuit for this example.
image developed using Fritzing. For more circuit examples, see the Fritzing project page
Include the Bridge, HttpClient and Console libraries
#include <Bridge.h>
#include <HttpClient.h>
#include <Console.h>
In setup() start Bridge, and wait for a serial connection before going into loop().
void setup() {
pinMode(13, OUTPUT);
digitalWrite(13, LOW);
Bridge.begin();
Console.begin();
while(!Console);
}
In loop(), create a named instance of HttpClient, and call a URL with client.get(url).
void loop() {
HttpClient client;
client.get("http://www.arduino.cc/asciilogo.txt");
As long as there are bytes from the server in the client buffer, read the bytes and print them to the serial monitor. Repeat every 5 seconds.
while (client.available()) {
char c = client.read();
Console.print(c);
}
Console.flush();
delay(5000);
}
The complete sketch is below :
/*
Yún HTTP Client Console version for Arduino Uno and Mega using Yún Shield
This example for the YunShield/Yún shows how create a basic
HTTP client that connects to the internet and downloads
content. In this case, you'll connect to the Arduino
website and download a version of the logo as ASCII text.
created by Tom igoe
May 2013
modified by Marco Brianza to use Console
This example code is in the public domain.
http://www.arduino.cc/en/Tutorial/HttpClient
*/
#include <Bridge.h>
#include <HttpClient.h>
#include <Console.h>
void setup() {
// Bridge takes about two seconds to start up
// it can be helpful to use the on-board LED
// as an indicator for when it has initialized
pinMode(13, OUTPUT);
digitalWrite(13, LOW);
Bridge.begin();
digitalWrite(13, HIGH);
Console.begin();
while (!Console); // wait for a serial connection
}
void loop() {
// Initialize the client library
HttpClient client;
// Make a HTTP request:
client.get("http://www.arduino.cc/asciilogo.txt");
// if there are incoming bytes available
// from the server, read them and print them:
while (client.available()) {
char c = client.read();
Console.print(c);
}
Console.flush();
delay(5000);
}
Last revision 2016/05/25 by SM