Many problems with apm 2.6 (3.1.1)

Mike, thanks for all, all was rigth but after hours searching for my chinesse motors, i find a video with a guy that shows how to calibrate them. Are the same same motors. Anyway it couldnt be reproduced. But gives me a way to understant in wich moment the motor says “calibrated suscesfull”.
After that, in stabilize mode i fly flaewlesly for about 15 minutes until rain starts…at 10:00 pm…
Anyway i continue having this yaw increase or decrease, i will continue to find the solution. But it can fly without problem.
**For the recors, and if anyone has simil problem… when the motors where badly configured, they didnt start at same time, or at same trothle… also if i armed the drone the motors wont spin at all only when i put trhottle on it, so…this is clearly a calibration fail.
Thanks to all
Next step:
**Fly some times for fun and avoid getting my fingers on it for a while jajajaja
**check yaw
**check failing telemetry
**Adding 360 sonnar with arduino nano
**Adding best legs because 3d printed orientation make them to fragile.