Could someone tell me how I connect my Ipad air with Groundstation app  to my Phantom Vision2+. When I start Groundstation it searches for aircraft but finds nothing. I have turned on Bluetooth as well. Pls advise. Niels B from DK

You can't use the iPad Ground Station with the V+, unless you add the Bluetooth data link to the aircraft.
That's why the V+ has its own version of Ground Station built into the Vision app.