I’ve no other thoughts to add to those you’ve already had, Rob.
I’ve deduced it’s something to do with the way the APP is trying to access the BT hardware in the iPad. If I turn off BT on the iPad both APPs fire up fine and I can navigate through the menus, even create flight plans and save them. But as soon as I enable the BT on the iPad the APP crashes.
I’m thinking that iOS has changed the way it lets APPs access hardware. With most BT connections you have to initiate a connection by the device settings, but with the Groundstation APP it’s the APP itself that creates the connection. I updated the iOS version this morning in the hope it was a bug in the previous release but it’s still behaving the same.
If we were dealing with any other setup it might be possible to find the fault and rectify it. As it is with both Apple and DJI both systems are closed, the worst marriage in RC history.
I do have one option left. I have an Android/W10 dual boot tablet which I can run the UGCS software (Universal Ground Control System) under its free use license. This works with the Datalink hardware, along with Ardupilot, Anafi, and DJI P4’s and Spark’s and Mavic’s when the controllers are connected to the USB port. I haven’t tried the Datalink with the Naza Assistant software on the PC but it might work as it sees the Datalink as a DJI Virtual Com Port exactly the same way as if you plug the Naza directly into a USB port, I think they use the same driver. I’d like to retain this feature as it’s much easier to make changes when the drone is in the air, as opposed to landing and plugging into a PC every time you want to adjust a gain setting.
But at the end of the day it is a DJI product and since the last GS APP update in 2015 we’ve been running on borrowed time.