I don’t use APM at all, just custom code. I have a python UDP script working over ethernet (and I’m assuming it will work over WIFI once that is up and running) but kind of useless at the moment since I can’t fly with an ethernet cable attached. Just out of curiosity, have you tried using a USB WIFI adapter instead of the built-in one? It’s on my list of things to test but haven’t gotten around to it yet.