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SW connects OK with drone, but it doesn't fly

pjotrvs
Sat, 28 Apr 2018 11:26:26 GMT

In general I think your software works like a charm, if you can get the drone to start OK. In my case, the SW connected OK, the flight plan loaded on the drone (Mavic Air), but then the drone didn't want to fly. Flying manually worked OK, but I was in a restricted zone. The DJI software came up with a warning, but accepting the risks, I was still able to fly. I can imagine that since you use the same settings as DJI, but don't offer this go-ahead-anyway dialog box, the drone doesn't want to fly. I will try again in another area later. But it would be good if you could offer the same warning and go-ahead-anyway dialog box as DJI.

pjotrvs
Sat, 28 Apr 2018 17:09:22 GMT

I found the cause: the new firmware of the Mavic Air, released yesterday (003), does not work fine with DH. After downgrading to 002, it worked again....

pjotrvs
Sun, 29 Apr 2018 09:48:25 GMT

sorry, probably another cause of my problem: the Mavic Air camera calibration. This seems to be an issue for many people. In the DJI Go App, you often get the message Camera Calibration Error - recalibrate, and then some instructions on how to do this. In DH, you probably get this error from the drone as well, but without the instructions on decalibration. So I think you need to include an error message display in DH, and the decalibration functions.

pjotrvs
Sun, 29 Apr 2018 09:52:44 GMT

sorry again, not camera calibration error, but compass calibration error.

davidadjiashvili
Tue, 01 May 2018 13:18:52 GMT

Hi, yes errors of this type are dealt differently form DJI Go at the moment, and the callibration worflow is not yet implemented in DH. It is on out to do list. Thanks for working out what the problem was. David

pjotrvs
Thu, 03 May 2018 08:33:55 GMT

I found a solution to the compass calibration error after reading some posts on the DJI forum: 1. Upgrade to latest firmware 2. Reset to factory default settings 3. Switch the tablet with DH and also your phone to Flight Mode. After doing all that, I was able to load the DH flight plan, the drone took off, followed all points, and at the end of the plan, I was even able to load new plans in-flight. Phew! Only once did DH lose connection with the drone and I had to press the RTH button on the controller to get the drone back.

davidadjiashvili
Thu, 03 May 2018 08:52:13 GMT

Thanks for let us know how you solved the problem! Might help us if this issue pops up again. Regarding the situation in which the drone loses connection. There is a choice in DH what action should be done if such a situation: either continue with mission or Hover in place. In some cases a short connection loss is hard to avoid even at close proximity flight (e.g. when flying between high buildings etc.).