villdev Posted at 9-1 02:34
how to do this on a smart controller?

Go to: https://www.phantomhelp.com/LogViewer/Upload/
... where you'll find instructions.
That will give a report you can post a link for the report here.
Or just post the .txt file.

Labroides Posted at 9-1 02:50
Go to: https://www.phantomhelp.com/LogViewer/Upload/
... where you'll find instructions.
That will give a report you can post a link for the report here.

https://www.dropbox.com/s/478tjqat5k4l3mi/djiflightrecord_2020-08-30_%5B08-49-00%5D.txt?dl=0 is this log needed?

villdev Posted at 9-1 03:09
https://www.dropbox.com/s/478tjqat5k4l3mi/djiflightrecord_2020-08-30_%5B08-49-00%5D.txt?dl=0 is this log needed?

Yes ... I'll get back soon with details of what I see in the data

villdev Posted at 9-1 03:09
https://www.dropbox.com/s/478tjqat5k4l3mi/djiflightrecord_2020-08-30_%5B08-49-00%5D.txt?dl=0 is this log needed?

Here's what a summary of that data looks like:
https://www.phantomhelp.com/logviewer/W9HAS2PVRLAZRS9MCIYE/

For most of your flight you were out in the open.
Later in the flight you brought the drone down lower than the launch point and while it was still out in the open, it had plenty of satellites.
But as you came back closer to the wall, it blocked part of the sky and your Mavic started to lose satellites at around 6:20.
At 6:34.2 the number of sats dropped to 7 satellites and the GPS health went to 0/5, which indicates that the flight controller had no confidence in the position data from the GPS.
It was at this time that you went full left stick up and at 6:35.7 you also went full right stick backwards.
There were also upward obstacle warnings from 6:36.7.
But with GPS health of 0/5, your drone had no horizontal holding ability and no brakes.
As it was in Tripod Mode acelleration would have been slow.

The pitch, roll and yaw data shows that the drone crashed into something at 6:37.1 and tipped forward and sideways and started falling.
It would have been confusing

The crash was due to getting the drone into a spot where it lost enough sats to lose the stability it has in GPS mode.
Being close to an obstacle and using full stick moves on the joysticks without brakes was the cause.

thank you.
I took off from the river bank, it is higher than water. at the moment when I lost control the height above the water was 3 meters and the distance to the cliff was 3 meters. I don’t understand why the drone detected the obstacle from above, but did not identify the obstacle in front.
"at 6:35.7 you also went full right stick backwards." - at that moment, the drone did not execute commands, and flew forward into the wall. I tried to fly back, and he flew forward himself.
what is needed so that this does not happen again, is it enough to turn off obstacle detection?
Does the SD card on the drone have more data from this crash?

villdev Posted at 9-1 05:18
thank you.
I took off from the river bank, it is higher than water. at the moment when I lost control the height above the water was 3 meters and the distance to the cliff was 3 meters. I don’t understand why the drone detected the obstacle from above, but did not identify the obstacle in front.
"at 6:35.7 you also went full right stick backwards." - at that moment, the drone did not execute commands, and flew forward into the wall. I tried to fly back, and he flew forward himself.

what is needed so that this does not happen again, is it enough to turn off obstacle detection?
When you have no GPS position holding, you also have no obstacle avoidance and no brakes.
If the drone is moving it will continue to move in the same direction.
Flying this way close to obstacles is very risky even if you have experience flying in atti mode.
Without experience, it's a very good way to make sure you crash.

I'm happy. I reсovered the drone after a crash. now I have logs from the body. how can i see them?

villdev Posted at 9-1 23:08
I'm happy. I reсovered the drone after a crash. now I have logs from the body. how can i see them?

That's a problem.
The .dat file in the Mavic 2 is encrypted.
Only DJI can read it.

villdev Posted at 9-1 23:08
I'm happy. I reсovered the drone after a crash. now I have logs from the body. how can i see them?

Hi villdev,

On your mobile devide yoiu can find a DAT file, FLY064.DAT, in the MCDatFlightrecords map.
In this DAT file more info about your flight is saved.

In my chart you see the last part of your flight, see the GPS satellites dropping in numbers, GPS reception to zero at and after the crash.Flying in GPS controlled mode with a low number of sats and a bad reception (in your flight 7-8 / 2 ) does have negative effect on its stability.
Crash at line 3971, check the pitch and roll columns!

cheers
JJB

JJB* Posted at 9-2 05:27
Hi villdev,

On your mobile devide yoiu can find a DAT file, FLY064.DAT, in the MCDatFlightrecords map.

I realized that the drone may not be stable. I don't understand why he stopped following my commands

fans16c68138 Posted at 9-2 23:33
I realized that the drone may not be stable. I don't understand why he stopped following my commands

Hi,

See the blue dots on the chart, this represents the position according to the recorded GPS postions.
Blue dots with no pitch/roll input so position should be the same, because of the bad gps reception those points may not reflect the actual postion. But if they do than your 100% aft stick did move the drone little backwards but also bit forward. (blue points above the black line)

So hard to tell why it did not followed your back input, but when the GPS position is not as the actual postion, drone will try to fly the new position (wich is mayby incorrect but true for the software), so mayby signals fight against each other.
With normal input and good GPS reception, i.e forward, drone fly forward and GPS position is going forward as well (actual and by GPS position calculation). If your fly forward and due to weird GPS signal software think its flying backwards as the received GPS position does say this....

In the chart ; first blue point in time is the one at 210 (the upper one) next 030 (lower one), in that sequence further.

cheers
JJB

JJB* Posted at 9-2 05:27
Hi villdev,

On your mobile devide yoiu can find a DAT file, FLY064.DAT, in the MCDatFlightrecords map.

I found it https://www.dropbox.com/s/sae1qhg2320orj4/20-08-30-08-46-00_FLY064.DAT?dl=0

villdev Posted at 9-1 02:34
https://www.dropbox.com/s/478tjqat5k4l3mi/djiflightrecord_2020-08-30_%5B08-49-00%5D.txt?dl=0 is this log needed?

Hi,

I am not a DAT specialist, but the GPS DOP values shows indeed bad accurancy at the end of this flight.
(this we already knew).

Before starting the motors a change was made in the app for the obstacle sensing, at 3m39 seconds you made another change in the app for the obstacle sensing, wich change did you made? (on a MA2 it means set OA to brake/bypass/off , don`t know the OA options on a MavicPro2)

Before starting the motors some minor gyro faults on both gyros, but after take-off no more faults on that.Seem that yo moved your drone a bit after powering up. (see chart)

This event "[L-NS][AHRS] BAD SAMPLE TICK MEASURE OR RECAPTURE SIGNAL: 0.005000" ; not sure what it means. Is it linked to GPS reception?

So cannot really help you more.

cheers
JJB