I built an Android app, named "Tello HKTellor" to drive the Ryze Tello.
https://play.google.com/store/apps/details?id=appinventor.ai_bccyuen.Tello_HKTellor
Join FB group, "hktellor" for more discussions/info,
https://www.facebook.com/groups/hktellor/
