Thanks for the help in advance. I am trying to install the Pixhawk on a DJI S-900 frame. All of my ESC’s flash and beep. Obviously, during the calibration they appear to only be flashing and beeping so I don’t know if the calibration is doing anything. It appears that I may have the wrong firmware or frame type because the beeping and flashing have the same symptoms as if you selected the wrong frame type using the old A2 controller. Is it possible that I have an incorrect power setup using the Mauch HS-200?