Follow Up: Just saw this via Supermechanical's Support Section:
"Hidden networks also aren't supported, so we recommend you make your network visible and use the strong WPA2 security protocol. "
http://help.supermechanical.com/kb/getting-started…
FWIW - I had the same challenge. I finally had to broadcast my SSID to enable Twine to 'see' it. Once I broadcasted, I could select it. So I have *that* part figured out but I still can't get Twine to connect.