Can I somehow run "t2 ap --on" in my tessel code so I could switch to access point mode dynamically?
Yes! See the API covered here. @HipsterBrown have we put this in docs anywhere yet?
Documenting the Network.Wifi and Network.AP API is on my TODO list for the weekend. It should have been done way earlier but it should be in the docs soon.
Issue created for folks to follow.