I have configured mu button to work with an open WiFi network, got your advice in January 2015 how to do it. Now I noticed that it does not work anymore. When I configure (with PassKey anonymous etc stuff) and restart the button , it only sets all red LEDs on. This configuration used to work quite well for months, not any more.
And yes, I do the configuration according your document.
your bttn seems to be connected now, but the action is failing ("Failed to execute http action: http request failed with code 400"). Please try configuring the action again.