I play with Arducopter for over one year(from APM1.0 to 2.5). My quad(APM2.5) with V2.8.1 fly ok in auto, RTL, Alt_Hold, and Loiter modes. When I upgrade my quad to V2.9.1 , the RTL, Alt_Hold, and Loiter modes are also fine, but the strange things ar
Hi: One of my ArduPilotMega IMU can't work properly. The IMU was installed on the Ardupilotmega board as shown in wiki manual. It works fine in CLI mode, and all the LEDs show normally. When it was switched to Flight mode and reconnected the power, t
