My HL octo is flying great with APM2.6 (w/ 3DRuBlox w compass) and AC3.1.5, but I have challenges in loiter. I can take off and enable loiter. Then the octo will stand perfectly steady, for lets say 5 minutes. Then I land, disarm, arm, and take off again and the octo flys away when I try to enable loiter again.
I have enclosed a photo of the 3DR uBlox GPS w/compass installation in relation to the batteries. Could it be that the batteries are blocking for good GPS reception? First good loiter after calibration had 8 satelites and hdop of 1.7 - 1.6. Next loiter, which was bad, I had 7 satelites and hdop of 2.2-2.3
I have now enabled compassmot and inteference at half throttle is 10% which should be acceptable. I am not sure if this affects the hdop though.
Does anyone have experience with these issues?