DroneFlying
Captain
Flight distance : 10774613 ft
United States
Offline
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Yes, I looked at it; FLY202.DAT seems to correspond to the video you posted showing the compass calibration message appearing multiple times during your flight. The graph below includes the first two times that you got the error message. The olive green line that starts out near the bottom is your altitude, the gold one is the Mavic's current, and the purple one your rear compass reading. As you'd expect, the current and altitude increase together as you applied throttle, but the interesting part is how the rear compass noise increases with current, and in particular how it spikes in a couple of areas as you applied heavy throttle. Those two places correspond to when you got compass calibration messages, so it appears there may be a correlation between your Mavic's power usage and the appearance of the calibration messages.
Given this, it's very possible that the suggestion by Ex Machina and Griffith that this is related to compass cabling is correct. Traditionally it resulted in ATTI mode rather than a compass calibration message, but I do know that DJI attempted to mitigate the problem with a firmware change, so it's possible this is just a different manifestation of that same problem or at least is related to it in some way. With a manufacture date of October 17, 2016, your Mavic would not have been delivered with the desirable cable twisting that DJI eventually incorporated into the Mavic, and given the noise levels I saw in your rear compass I'm pretty sure you haven't arranged to have the cabling twisted since you received it, have you?
If you report this to DJI I think it's likely that they'll offer you a warranty "repair" (more likely a replacement) so you won't have to pay anything. Since you haven't mentioned any problems other than the calibration message and given that it appeared to fly just fine in the video you posted, my guess is that this isn't serious and that you could probably continue flying without a problem. Even so, being the cautious guy that I am I'd recommend that you either consider letting DJI replace it or keep it and arrange to have the cabling twisted done per this thread. If you're not comfortable doing it yourself, you also have the option of paying someone local to you or someone like Thunder-Drones to do it for you.
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Compass Calibration
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