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Controller disconnects: causes?
1956 28 2019-3-17
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cfede
lvl.3
Flight distance : 12379 ft
Argentina
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Hi,

Sometimes I got the error 'controller disconects' and immediately it triggers the RTH. After a few seconds it connects again but it's very annoying and risky.

I'm using latest RC, Spark and DJI 4 app version. Connecting the RC to the phone with OTG cable.
This could be due to Wi-Fi interference? Compass error? Phone error?.

Can I analyze that flight with the DJI Assistant (black box)?

Thanks

2019-3-17
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Stinger1
lvl.4
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Australia
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Sounds like interference. Does it happen at other locations.
2019-3-17
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DJI Stephen
DJI team
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Hello and good day cfede. I am sorry to know that you are having this issue with your DJI Spark. May I please know what is the model of the mobile device you are using? In addition, please try another USB cable to connect then please restart your mobile device and remote controller to connect again. Finally, please try to reset the WiFi of the remote controller. After the WiFi reset, please try to connect once more to check if the issue will still persists. Thank you.
2019-3-17
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cfede
lvl.3
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Argentina
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Stinger1 Posted at 3-17 12:58
Sounds like interference. Does it happen at other locations.

Maybe. Because I'm using the Wi-Fi channel not in AUTO mode.
2019-3-18
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cfede
lvl.3
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Argentina
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DJI Stephen Posted at 3-17 13:05
Hello and good day cfede. I am sorry to know that you are having this issue with your DJI Spark. May I please know what is the model of the mobile device you are using? In addition, please try another USB cable to connect then please restart your mobile device and remote controller to connect again. Finally, please try to reset the WiFi of the remote controller. After the WiFi reset, please try to connect once more to check if the issue will still persists. Thank you.

I think it's an issue with the remote controller since the RC sticks don't respond when this occurs.

All in all, this happened to me only 2 times in more than 5 flight hours. I will double check the interference next time, with the DJI app.
2019-3-18
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Sayhelloforme
Captain
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United States
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It could be a lose controller port.
2019-3-18
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S-e-ven
Captain
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How do you position the antennas of the RC towards the Spark? = ....... X  or ll ....... X



2019-3-18
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cfede
lvl.3
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Argentina
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S-e-ven Posted at 3-18 17:54
How do you position the antennas of the RC towards the Spark? = ....... X  or ll ....... X

This way:
7d5e78f5-0eeb-4887-9717-487a8e4fa6fe.jpg
I know it's a bad habit since mostly I use the RC at 45 degrees from floor.

I should put the antenas this way:
1496066479000_img_807238.jpg
2019-3-19
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S-e-ven
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Case solved, me thinks
2019-3-19
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cfede
lvl.3
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Argentina
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S-e-ven Posted at 3-19 17:00
Case solved, me thinks

haha but should have said "weak signal" or something like that. Instead became disconnected from one moment to another.
2019-3-19
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S-e-ven
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Just look at the wifi signal indicator.
And think about, even the antennas right postioned can in distance (only 1 or 2 bars left) a little turn, just some degree to the left or right, send that down to "disconnected".
2019-3-19
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sparkdrone
lvl.4
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United States
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Either you are in an area with lots of interference or you when behind something like a building. ( I actually when behind a building and lost signal.)
Also try calibrating the compass and see if the issue is fixed.
If not then it's some other problem either with the drone itself, the remote controller or both.
2019-4-3
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sparkdrone
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United States
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Edit to post #13

Edit to post #13:
You also have to make sure the antennas are pointed the right way.
I tried changing the antennas position and I also tried going inside and I got bad signal.
2019-4-3
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cfede
lvl.3
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Argentina
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Recently I've used it in a clear space, with OTG cable and 5.8Ghz RC to drone wifi. In an open space with clear Line of sight and it became disconnected after 400 meters.

Please check the following image:

2019-4-23
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Sayhelloforme
Captain
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cfede Posted at 4-23 18:06
Recently I've used it in a clear space, with OTG cable and 5.8Ghz RC to drone wifi. In an open space with clear Line of sight and it became disconnected after 400 meters.

Please check the following image:

What type of device are you using  ?
2019-4-23
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AntDX316
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cfede Posted at 4-23 18:06
Recently I've used it in a clear space, with OTG cable and 5.8Ghz RC to drone wifi. In an open space with clear Line of sight and it became disconnected after 400 meters.

Please check the following image:

There was some information that spread about Spark devices not in the US have a CE limit which is less powerful than the FCC limit.
2019-4-23
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S-e-ven
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cfede Posted at 4-23 18:06
Recently I've used it in a clear space, with OTG cable and 5.8Ghz RC to drone wifi. In an open space with clear Line of sight and it became disconnected after 400 meters.

Please check the following image:

5.8 and 400m? Sounds like the Spark is in CE mode
Do you know, wehich applies to Argentina? FCC or CE powersettings?
Try that location again, but change the band to 2.4.
Should get you to 7-800m, than
2019-4-23
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Tomasz Laptas
Second Officer
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United Kingdom
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Happened to me many times,  once in harbor which was understandable and many other times in the middle of the field which seems to be interference free.
I do understand all of the factors which can cause it.
Since then I don't really trust it.
2019-4-24
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cfede
lvl.3
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Argentina
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Sayhelloforme Posted at 4-23 19:28
What type of device are you using  ?

LG G6 downgraded to android 7.0. Using last DJI GOI 4 app version.
2019-4-24
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cfede
lvl.3
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Argentina
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S-e-ven Posted at 4-23 22:31
5.8 and 400m? Sounds like the Spark is in CE mode
Do you know, wehich applies to Argentina? FCC or CE powersettings?
Try that location again, but change the band to 2.4.

Unfortunately I cannot test that location again since it was in Chile during vacations.

Next time I fly it I will record the screen to see what happen If i change from 5.8 to 2.4 and with the RCantenas in L shape VS I shape.

2019-4-24
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cfede
lvl.3
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How can i know if i'm flying in FCC or CE.

"If you’re in CE mode, you’ll get 13 channels on the 2.4 band. If your in FCC mode, you’ll only get 11"

That way?.
2019-4-24
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S-e-ven
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Get the DJI Go4 mod 2.0
Fly one time with the "blue" Go4
Fly afterwards with the "red" Go4 (mod 2.0)
That one for sure is FCC!

My bird is even in FCC mode not always showing "just 11 channels".
Can be the Go4 version, who knows.
So go around that and use one time a defined FCC mode!
(Perhaps you will keep it that way? ;-)
2019-4-24
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cfede
lvl.3
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Argentina
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S-e-ven Posted at 4-24 07:03
Get the DJI Go4 mod 2.0
Fly one time with the "blue" Go4
Fly afterwards with the "red" Go4 (mod 2.0)

Why first use LITE and then Mod 2.0 ?
2019-4-24
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S-e-ven
Captain
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Nope!
The mod 2.0 is coming with a red icon
So that it is easier to recognize.
When installed aside the original DJI version.
Which has a blue icon.
I did not mention the lite version, b/c that needs to remove the  original (playstore) version!
2019-4-24
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Sayhelloforme
Captain
Flight distance : 8133219 ft
United States
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Could be interference or your phone. Do you have another device you could try to see if the works ?
2019-4-24
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Sayhelloforme
Captain
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cfede Posted at 4-24 14:32
Why first use LITE and then Mod 2.0 ?




Also make sure you disable any background apps. This might help.
2019-4-24
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cfede
lvl.3
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Argentina
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S-e-ven Posted at 4-24 15:54
Nope!
The mod 2.0 is coming with a red icon
So that it is easier to recognize.

Oooh I see. You said that I can fly first with one app, the original one and then with the mod 2.0 to compare.
Thanks, i will try that ;)
Is there any risk to use an unnoficial DJI app?
2019-4-24
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S-e-ven
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cfede Posted at 4-24 17:15
Oooh I see. You said that I can fly first with one app, the original one and then with the mod 2.0 to compare.
Thanks, i will try that ;)
Is there any risk to use an unnoficial DJI app?

Of course!
That you wanna do that more often!
In case you are using mod 2.0, check the second page of the intelligent flight modes, too.
Swipe to the left.

2019-4-24
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cfede
lvl.3
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Argentina
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S-e-ven Posted at 4-24 17:39
Of course!
That you wanna do that more often!
In case you are using mod 2.0, check the second page of the intelligent flight modes, too.

I've just tried with the official app and i see channels 13 and 14 to select. So apparently here in Argentina DJI chose CE mode.
2019-4-24
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