Hello,
I discovered LibrePilot that I just used to examine the configuration of my Quad Eachine 250 FPV. As LibrePilot announced that the firmware version was not compatible, I downloaded and installed the latest version (Black Rhino 16.9). I redo all the configuration without encountering too much problem; but I can not start the drone. Note that the radio works well because I can act on the LEDs with the SWB switch that I have mapped on channel 6. What can be the cause of this non-starting engines (which work during calibration)? Thank you for your help.