Last Sunday i flew my spark in a small park close to my home.
I used the RC connected through wifi with my iphone 6s. All the initially tests were performed succesfully, set Home Point and i took it off. I raised it to 20m height and only managed to fly it for 30m before it got disconnected and lost. There was no warning of compass loss or returning to home, it just got lost. There are some trees near but the drone was at a height more than them.


It is very annoying, I managed to fly it over 450m during my vacation and I lost it in 30 meters without even getting a warning.

i attach the flight log no interference, 93% of battery...

http://app.airdata.com/main?flig ... _id=WEATHERWind_Map

I need to know what might have gone wrong and after a week i have lost any faith of finding it again.

Thank you for any comments / suggestions.

George

The link?
As I can't see somthing there, one question:
20m or 30m away from homepoint, at time you lost it over trees.
Was it still line of sight or already FPV only?

Edit: I clicked "general", now I see something ;-)

Can you upload your log to link below, to PH they are much more comprehensive and accurate than airdata. Just click on link and follow instructions. I will have a look for you.

http://www.phantomhelp.com/LogViewer/Upload/

Looking at that area, it may stick in a tree.
But in one week also someone else can have picked it up already!
Trees between phone/RC and Spark is really not recommended.
It's a Wifi drone and trees are not only reflective but also waterpipes, so to speak

S-e-ven Posted at 2017-9-10 03:16
The link?
As I can't see somthing there, one question:
20m or 30m away from homepoint, at time you lost it over trees.

It was on sight but  then as i was pressing forth & up it disappeared. I imagine that by raising it up and as it was higher than the trees there was no chance of collision any of them. And also the sudden lack of signal is so strange

fansffd2d615 Posted at 2017-9-10 03:26
It was on sight but  then as i was pressing forth & up it disappeared. I imagine that by raising it up and as it was higher than the trees there was no chance of collision any of them. And also the sudden lack of signal is so strange

You were at 100 ft , you had very limited gps it suggests you may have went into Atti mode and drifted but your log shows very little.

hallmark007 Posted at 2017-9-10 03:20
Can you upload your log to link below, to PH they are much more comprehensive and accurate than airdata. Just click on link and follow instructions. I will have a look for you.

http://www.phantomhelp.com/LogViewer/Upload/

http://www.phantomhelp.com/LogViewer/6MRE3FZ01YK415JRNU8J/

is this OK?

did you try find my drone from the dji go app? ?Also dont look down for yor drone....look up to the trees ...it might stuck in the tree brances....

Anuvis Posted at 2017-9-10 03:53
try find my drone ?

yes, we tried. looked around the bushes, not really have a clear view on top of the trees.  and i donnot have another drone to fly it over. The strange thing i repeat, there was no warning or attempt to turn back to Home point

fansffd2d615 Posted at 2017-9-10 03:26
It was on sight but  then as i was pressing forth & up it disappeared. I imagine that by raising it up and as it was higher than the trees there was no chance of collision any of them. And also the sudden lack of signal is so strange

Yep, you could see it.
How about the RC?
That can be a hugh difference, 50-60cm closer to the ground and this close to and above trees!
Also in urban area, aprox. some other wifi around, ....

S-e-ven Posted at 2017-9-10 03:52
Yep, you could see it.
How about the RC?
That can be a hugh difference, 50-60cm closer to the ground and this close to and above trees!

yes, there are wifi of the cofee shops around

fansffd2d615 Posted at 2017-9-10 03:52
yes, we tried. looked around the bushes, not really have a clear view on top of the trees.  and i donnot have another drone to fly it over. The strange thing i repeat, there was no warning or attempt to turn back to Home point

Not to go for a search....I mean the dji go app has an option in case you lost the drone that is called "Find my Drone".Did you open this?

Anuvis Posted at 2017-9-10 04:01
Not to go for a search....I mean the dji go app has an option in case you lost the drone that is called "Find my Drone".Did you open this?

i opened it and showed actually the place i was flying it from. But the button to ESC Beeping was not active...

fansffd2d615 Posted at 2017-9-10 03:56
yes, there are wifi of the cofee shops around

        38.006272        23.82749149
These are your last known coordinates you were 72ft altitude 103 ft from home when log ends abruptly it doesn't show any indication of crash your gps signal was weak , it's not clear what happened after that but your aircraft should be at that location or it continued to drift on the same line , I don't think radio signal was lost as RTH would have kicked in.
You should try again to look for it or put some lost notices around to see if anyone spotted it.

hallmark007 Posted at 2017-9-10 04:13
38.006272        23.82749149
These are your last known coordinates you were 72ft altitude 103 ft from home when log ends abruptly it doesn't show any indication of crash your gps signal was weak , it's not clear what happened after that but your aircraft should be at that location or it continued to drift on the same line , I don't think radio signal was lost as RTH would have kicked in.
You should try again to look for it or put some lost notices around to see if anyone spotted it.

The video also clearly shows that is it on top of the trees and sudden loss of connection. I go to the park everyday with the kids and have told to other parents, that I know if they saw or listened anything. Until now no news. I really appreciate your time trying to resolve what happened and what is my mistake.

Anuvis Posted at 2017-9-10 04:01
Not to go for a search....I mean the dji go app has an option in case you lost the drone that is called "Find my Drone".Did you open this?

yes i did. It indicated the place i was flying it from. I would have seen it

fansffd2d615 Posted at 2017-9-10 04:26
yes i did. It indicated the place i was flying it from. I would have seen it

...and also if it have returned back over the trees i would have regained connection, is it?

Sen a personall mesage to one of the forum moderators to check the case....

I will ask the residents of the building I was standing in front if it returned and hit on the terrace or any balcony though

Anuvis Posted at 2017-9-10 04:36
Sen a personall mesage to one of the forum moderators to check the case....

I need to raise a case first, right?

I don't quite understand, according to the log, it's like your Spark just shut off suddenly mid-flight. Because if signal lost, it should kick in return-to-home, and that should show in the log. Also, it is not possible to lost the connection between the RC and aircraft at that distance. You can lost the connection between Phone and lost the live-feed video, but should still be able to control aircraft with controller.
Does this mean the power shut-off not yet been solved with the mandatory update.
Without the blackbox, and the log shows nothing strange, I really doubt DJI will be able to do anything about this.

looks like a shutoff midair.

fansffd2d615 Posted at 2017-9-10 04:36
I need to raise a case first, right?

Yes first raise a case support@dji.com

Did you do anything wrong:
Your log doesn't show you doing anything wrong, your log ended abruptly altitude 72ft from take off and 103 ft from homepoint which was recorded.
So if the tree was higher than 72 ft you could have crashed, but this would have almost certainly shown in your log with many warnings.
If you lost radio signal aircraft should have gone into RTH it didn't .
There are no irregularities in your battery.
This will  ultimately be dji's decision but from what I see it does not show you doing anything wrong, with exception of tree, only you know the height of it.
So don't give up hope I have seen dji offer warranty for less.

Good luck I hope something goes right for you.

i dont think that dji has solved the midair shutoff Problem..there are already many cases with that problem. and dji does nothing..till one spark falls on someones head!

fans3b8dd2c3 Posted at 2017-9-10 05:18
i dont think that dji has solved the midair shutoff Problem..there are already many cases with that problem. and dji does nothing..till one spark falls on someones head!

There is nothing to show this was a midair shutoff, certainly battery was in very good condition. If you have any proof I'm sure OP would welcome this.

In any case, until I find what happened I will keep on looking for it. Meantime I will raise a case and see the outcome of it. Thank you all, looking into this! Best, George

hallmark007 Posted at 2017-9-10 05:10
Yes first raise a case

Did you do anything wrong:

well battery shows 0 charges.....This means that the  battery was new and has no charge or a defective battery....

Anuvis Posted at 2017-9-10 06:10
well battery shows 0 charges.....This means that the  battery was new and has no charge or a defective battery....

I don't know what you mean by that, the battery clearly shows all through the flight to be working exactly as it should.

Are we now saying that we shouldn't fly with new battery, also if airdata are saying 0 charges for battery then this just goes to show how awful their flight records are, because surely it had to be charged at least once...

Why do you say defective battery? Surely you can see throughout the flight the battery is working fine, there is nothing to show in flight log that this was anything to do with faulty battery unless I'm missing something maybe you can show me this.

hallmark007 Posted at 2017-9-10 06:20
I don't know what you mean by that, the battery clearly shows all through the flight to be working exactly as it should.

Are we now saying that we shouldn't fly with new battery, also if airdata are saying 0 charges for battery then this just goes to show how awful their flight records are, because surely it had to be charged at least once...

I am not sure if is air data malfunction....Because i test it and says the exact the same charges as the dji go app for me....Maybe the battery was new i am trying to say that if battery was new maybe was a defect or something that....Just 0 charges make me feel strange...

battery history - wrong battery. post history of right one

Right battery history

Anuvis Posted at 2017-9-10 06:26
I am not sure if is air data malfunction....Because i test it and says the exact the same charges as the dji go app for me....Maybe the battery was new i am trying to say that if battery was new maybe was a defect or something that....Just 0 charges make me feel strange...

I suppose if you think because battery was new or didn't show a charge in a third party app this is more proof for you than all of the log showing a perfect battery, I find this kind of logic strange,

I checked and it is definitely one of the 2 original ones in the combo package

fansffd2d615 Posted at 2017-9-10 06:45
I checked and it is definitely one of the 2 original ones in the combo package

...because last week I also had bought another 2 batteries.. But the one I flew was not one of them

The first time you charge a battery it still shows as zero charges. That is true on all DJI products.

Did you become a message to update your battery after the last fw update from August? Or did it not appear? I mean, are you sure you had the mandatory Update installed for that battery?

yes I run all the updates to the aircraft, batteries and new batteries

In case of a midair shutoff, shouldn't there be the message "Aircraft disconnected"? I would expect at least that message.

Wachtberger Posted at 2017-9-10 07:28
In case of a midair shutoff, shouldn't there be the message "Aircraft disconnected"? I would expect at least that message.

If aircraft power cuts off you can't get a message where would it come from ?

From the RC and App of course, they should realize when connection to aircraft is lost.