"If you are having problems with v3.2.1 on APM 2.x hardware and your multirotor is unstable and won't sit still but worked fine with v3.1.5 or v3.2, try changing the parameter INS_MPU6K_FILTER to 20 or 42 rather than the default of 0. The value of…"
"BTW- forgot to add that even with calibrating the ESCs the motors don't always spin up at the same speed, OpenPilot for the CC3D flight controller even has a calibration routine for adjusting this during board setup for instance. So that the motors…"
"@Ken Costigan are those ESC to motor bullet connectors bare like it looks in the photo, or are they covered some something like clear heatshrink that you just can't see? If there is bare metal then that's what's causing the crashes!!
During…"
"I've been using the APM 2.5 controllers that come on the Cheerson Cx-20 and the Quanum Nova, and a Pixhawk on a hexacopter 550 build and never had issues with GPS lock or low satellite counts, yet hear all the time about GPS issues in the various…"
BTW- are you doing an Autotune or an Autotrim? If you are holding the sticks to unlock and then continue till the lights start flashing and then hold a hover for about 20 seconds, that's an Autotrim…"