If you connect through TPlink, check the network tab in ASIAir. it should display the Asiair IP (WiFi or Ethernet...)
in SkySafary, this is the IP with port 4030 you should fill there.
Even through TPLink, ASIAir should still run its own WiFi, I suggest you try connecting directly to it first, to check connection with Skysafari and most default settings... once all up and running, then connect to TPLink and try with ASIAir IP/4030.