I have had some success with my Yun. I can send data to a Google docs spreadsheet. But I can not get data to go the other way.
There are lots of tutorials and the example bridge.ino that all seem to work the same way to turn a LED on and off by entering a URL in a browser. But I can't get it do do anything.
I can ping my Yun 192.168.1.6 by Ethernet or 192.168.1.7 by WiFi flawlessly.
If I send something bogus like 192.168.1.7/foobar/mode/8/OUTPUT the browser shows the error "No such File or directory" so something is trying to interpret the command and correctly failing.
I can run blink.ino on pin 8 so I know my I/O pin, LED, and resistor are OK.
But sending 192.168.1.7/arduino/mode/8/OUTPUT or 192.168.1.7/arduino/digital/8/1 or 192.168.1.7/arduino/digital/8/0 give no browser response and no voltage shift on pin 8. It is like the command is accepted but not executed.
I have also tried other digital pins.
What am I doing wrong?