Really having difficulty connecting to my Yun Console.

I can’t seem to connect to the Yun console. I have tried any of the sketeches and had no luck. I get errors ranging from auth issues to io exceptions.

The sketch below generates an io exception

Console ASCII table for YunShield/Yún
Prints out byte values in all possible formats:

  • as raw binary values
  • as ASCII-encoded decimal, hex, octal, and binary values

For more on ASCII, see and

The circuit:

  • YunShield/Yún

created 2006
by Nicholas Zambetti
modified 9 Apr 2012
by Tom Igoe
modified 22 May 2013
by Cristian Maglie

This example code is in the public domain.


#include <Console.h>

void setup() {
//Initialize Console and wait for port to open:

// Uncomment the following line to enable buffering:
// - better transmission speed and efficiency
// - needs to call Console.flush() to ensure that all
// transmitted data is sent


while (!Console) {
; // wait for Console port to connect.

// prints title with ending line break
Console.println(“ASCII Table ~ Character Map”);

// first visible ASCIIcharacter ‘!’ is number 33:
int thisByte = 33;
// you can also write ASCII characters in single quotes.
// for example. ‘!’ is the same as 33, so you could also use this:
//int thisByte = ‘!’;

void loop() {
// prints value unaltered, i.e. the raw binary version of the
// byte. The Console monitor interprets all bytes as
// ASCII, so 33, the first number, will show up as ‘!’

Console.print(", dec: ");
// prints value as string as an ASCII-encoded decimal (base 10).
// Decimal is the default format for Console.print() and Console.println(),
// so no modifier is needed:
// But you can declare the modifier for decimal if you want to.
//this also works if you uncomment it:

// Console.print(thisByte, DEC);

Console.print(", hex: ");
// prints value as string in hexadecimal (base 16):
Console.print(thisByte, HEX);

Console.print(", oct: ");
// prints value as string in octal (base 8);
Console.print(thisByte, OCT);

Console.print(", bin: ");
// prints value as string in binary (base 2)
// also prints ending line break:
Console.println(thisByte, BIN);

// if printed last visible character ‘~’ or 126, stop:
if (thisByte == 126) { // you could also use if (thisByte == ‘~’) {
// ensure the latest bit of data is sent

// This loop loops forever and does nothing
while (true) {
// go on to the next character

Are you using an actual YUN or the YUN shield ?