Good afternoon...Recently purchased 10 Tello EDU drones for my classroom and have been having some fun simply flying them via the Tello app on the iPad. We want to start "coding" them using Scratch or Swift or DroneBlocks but I am having a tough time getting any of those to work. Currently the drone I am testing things with flies just fine off the app but does nothing but blink purple when trying to use any of the above apps. Am I missing something obvious? While I never imagined it would be super easy, I was hopeful that the drones would connect and allow kids to upload coded flights...appreciate any help. Thanks!