Arduino Yún Console Read

Parse information from the Console and repeat it back.

This example for a Yún device reads data coming from Bridge using

Console.read()
and stores it in a string.

To see the Console, pick your Yún's name and IP address in the Port menu then open the Serial Monitor. You can also see it by opening a terminal window and typing:

ssh root@ yourYunsName.local 'telnet localhost 6571'
then pressing enter. When prompted for the password, enter it.

When running this example, make sure your computer is on the same network as the Yún device.

Hardware Required

  • Yún board or shield

  • computer and Yún device on the same wireless network

Circuit

There is no circuit for this example.

The circuit for this tutorial.
The circuit for this tutorial.

image developed using Fritzing. For more circuit examples, see the Fritzing project page

Code

Include the Console library, which inherits from Bridge.

#include <Console.h>

Create a string to hold the information from the Bridge

String name;

In

setup()
initialize the Bridge and Console. Wait for a Console connection, then ask for some information :

1void setup() {
2
3 Bridge.begin();
4
5 Console.begin();
6
7 while (!Console);
8
9 Console.println("Hi, what's your name?");
10}

In

loop()
, check to see if there are bytes in the Console buffer. If there's something available, read the the oldest character into a local variable.

1void loop() {
2
3 if (Console.available() > 0) {
4
5 char c = Console.read();

If the character is a newline ("\n"), it is the last character in the incoming string. Print out the string to the Console, ask for more information, and clear the string.

1if (c == '\n') {
2
3 Console.print("Hi ");
4
5 Console.print(name);
6
7 Console.println("! Nice to meet you!");
8
9 Console.println();
10
11 Console.println("Hi, what's your name?");
12
13 name = "";
14
15 }
16}

If the character in the buffer is not a newline, add it to the end of the string.

1else {
2
3 name += c;
4
5 }
6
7 }
8}

The complete sketch is below :

1/*
2
3Console Read example for YunShield/Yún
4
5 Read data coming from bridge using the Console.read() function
6
7 and store it in a string.
8
9 To see the Console, pick your Yún's name and IP address in the Port menu
10
11 then open the Port Monitor. You can also see it by opening a terminal window
12
13 and typing:
14
15 ssh root@ yourYunsName.local 'telnet localhost 6571'
16
17 then pressing enter. When prompted for the password, enter it.
18
19 created 13 Jun 2013
20
21 by Angelo Scialabba
22
23 modified 16 June 2013
24
25 by Tom Igoe
26
27 This example code is in the public domain.
28
29 http://www.arduino.cc/en/Tutorial/ConsoleRead
30
31 */
32
33#include <Console.h>
34
35String name;
36
37void setup() {
38
39 // Initialize Console and wait for port to open:
40
41 Bridge.begin();
42
43 Console.begin();
44
45 // Wait for Console port to connect
46
47 while (!Console);
48
49 Console.println("Hi, what's your name?");
50}
51
52void loop() {
53
54 if (Console.available() > 0) {
55
56 char c = Console.read(); // read the next char received
57
58 // look for the newline character, this is the last character in the string
59
60 if (c == '\n') {
61
62 //print text with the name received
63
64 Console.print("Hi ");
65
66 Console.print(name);
67
68 Console.println("! Nice to meet you!");
69
70 Console.println();
71
72 // Ask again for name and clear the old name
73
74 Console.println("Hi, what's your name?");
75
76 name = ""; // clear the name string
77
78 } else { // if the buffer is empty Cosole.read() returns -1
79
80 name += c; // append the read char from Console to the name string
81
82 }
83
84 } else {
85
86 delay(100);
87
88 }
89}

Last revision 2016/05/25 by SM

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