FAQ: How do I turn off the Omega's WiFi Access Point?
You cannot turn off the Omega's WiFi Access Point and still connect to an external WiFi network.
However, it is possible to hide the Omega's WiFi Access Point (not broadcast the SSID) by running the following commands:
uci set wireless.ap.hidden=1 uci commit wireless wifi
For more discussion on this topic, see this post on the Onion Community: http://community.onion.io/topic/1599/how-to-disable-ap/24