Actually, Autopilot is not the one to blame, but using it before the DJI GO app .
So the thing is that i updated to latest fw (1.3 for remote and 1.4 for aircraft), and did NOT run an IMU calibration afterwards.
I went to fly, and started the DJI GO app to exit travel mode, then closed the app, shut down the aircraft, and attached the gimbal.
After this, i started the Autopilot app, and added zipline to it. I was getting several warnings about the GPS position (using iPad mini 3), until everything appeared to be ok. I set the height to 30m for both points, then engaged the craft.
I noticed that it was flying up and not stopping, to a point i almost lost sight. Then i realized that the craft "height" was zero in the app! I would say that when i switched to manual control (F), it was already above 100m. I started to bring down the aircraft, and was able to land it manually.
After this, i thought it would be a good idea to restart the aircraft, so i powered it down, and then up. It was then not willing to take off, but not making any kind of sounds or warnings, so i decided to close the Autopilot and open the DJI Go app.
There, i got two errors: "MC connection to center board failed", and "IMU calibration needed". The aircraft started to continuously beeping twice also after a few seconds of rebooting, and the camera would seem to "die" (though it still provided video feedback). I tried everything while at the field, like cleaning contacts, cleaning pins, making sure that gimbal cables were properly attached, calibrate IMU (which didnt move from 0%)... but nothing worked.
So, i decided to get back home, and there i assembled again the craft with the gimbal. This time i would only get the IMU calibration error. I just tried to calibrate IMU again, and this time it would work. After it was done, the aircraft had no more errors.
I still need to check it on a real flight, but it looks good now.
Lessons learned:
Hope this helps to anyone with similar or same issue!
PS: Yes, i know you guys will eat me alive with the "why didnt you calibrate IMU after update?"
So the thing is that i updated to latest fw (1.3 for remote and 1.4 for aircraft), and did NOT run an IMU calibration afterwards.
I went to fly, and started the DJI GO app to exit travel mode, then closed the app, shut down the aircraft, and attached the gimbal.
After this, i started the Autopilot app, and added zipline to it. I was getting several warnings about the GPS position (using iPad mini 3), until everything appeared to be ok. I set the height to 30m for both points, then engaged the craft.
I noticed that it was flying up and not stopping, to a point i almost lost sight. Then i realized that the craft "height" was zero in the app! I would say that when i switched to manual control (F), it was already above 100m. I started to bring down the aircraft, and was able to land it manually.
After this, i thought it would be a good idea to restart the aircraft, so i powered it down, and then up. It was then not willing to take off, but not making any kind of sounds or warnings, so i decided to close the Autopilot and open the DJI Go app.
There, i got two errors: "MC connection to center board failed", and "IMU calibration needed". The aircraft started to continuously beeping twice also after a few seconds of rebooting, and the camera would seem to "die" (though it still provided video feedback). I tried everything while at the field, like cleaning contacts, cleaning pins, making sure that gimbal cables were properly attached, calibrate IMU (which didnt move from 0%)... but nothing worked.
So, i decided to get back home, and there i assembled again the craft with the gimbal. This time i would only get the IMU calibration error. I just tried to calibrate IMU again, and this time it would work. After it was done, the aircraft had no more errors.
I still need to check it on a real flight, but it looks good now.
Lessons learned:
- After a firmware update, ALWAYS calibrate compass and IMU thru DJI Go app.
- Do NOT use Autopilot app right after a firmware update!
Hope this helps to anyone with similar or same issue!
PS: Yes, i know you guys will eat me alive with the "why didnt you calibrate IMU after update?"
