Arduino Yún HTTP Client Console
Create a simple client that downloads a webpage and prints it to the serial monitor via Wi-Fi 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 Wi-Fi 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.
Hardware Required
Yún board or shield
a wireless network connection to the internet
Circuit
There is no circuit for this example.
image developed using Fritzing. For more circuit examples, see the Fritzing project page
Code
Include the Bridge, HttpClient and Console libraries
1#include <Bridge.h>2#include <HttpClient.h>3#include <Console.h>
In
setup()
start Bridge, and wait for a serial connection before going into loop()
.1void setup() {2
3 pinMode(13, OUTPUT);4
5 digitalWrite(13, LOW);6
7 Bridge.begin();8
9 Console.begin();10
11 while(!Console);12}
In
loop()
, create a named instance of HttpClient, and call a URL with client.get(url)
.1void loop() {2
3 HttpClient client;4
5 client.get("http://arduino.tips/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.
1while (client.available()) {2
3 char c = client.read();4
5 Console.print(c);6
7 }8
9 Console.flush();10
11 delay(5000);12}
The complete sketch is below :
1/*2
3 Yún HTTP Client Console version for Arduino Uno and Mega using Yún Shield4
5 This example for the YunShield/Yún shows how create a basic6
7 HTTP client that connects to the internet and downloads8
9 content. In this case, you'll connect to the Arduino10
11 website and download a version of the logo as ASCII text.12
13 created by Tom igoe14
15 May 201316
17 modified by Marco Brianza to use Console18
19 This example code is in the public domain.20
21 http://www.arduino.cc/en/Tutorial/HttpClient22
23 */24
25#include <Bridge.h>26#include <HttpClient.h>27#include <Console.h>28
29void setup() {30
31 // Bridge takes about two seconds to start up32
33 // it can be helpful to use the on-board LED34
35 // as an indicator for when it has initialized36
37 pinMode(13, OUTPUT);38
39 digitalWrite(13, LOW);40
41 Bridge.begin();42
43 digitalWrite(13, HIGH);44
45 Console.begin();46
47 while (!Console); // wait for a serial connection48}49
50void loop() {51
52 // Initialize the client library53
54 HttpClient client;55
56 // Make a HTTP request:57
58 client.get("http://arduino.tips/asciilogo.txt");59
60 // if there are incoming bytes available61
62 // from the server, read them and print them:63
64 while (client.available()) {65
66 char c = client.read();67
68 Console.print(c);69
70 }71
72 Console.flush();73
74 delay(5000);75}
Last revision 2016/05/25 by SM
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