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Poor signal on 5Ghz in Europe
1381 30 2017-10-18
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Bupitz
lvl.2
Flight distance : 269304 ft
Romania
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Hi guys.

I don't know if it is from the last Go4 app update or something else but flying the Spark on 5Ghz is a mess lately.
I get tons of loss of signal, app exits and disconects at al kind of distances.

Today I got loss of signal at 2m distance from the Spark for the first time and I could barely fly.
I'm starting to lose my patience with it, it is no fun anymore, I feel like a beta tester.

I couldn go further than 50m today.

I'm using the Spark with the remote controler and a Samsung S7 (Android).
See the attach... poor signal at 31m distance and 31m altitude with no interferance.

SAD

Spark

Spark
2017-10-18
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Sparky_17
Captain
Flight distance : 62349 ft
Canada
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based on the many forum post here, is that the issue might be related to your android phone.  I use an iphone 6s on IOS 11.1(beta 3) and have had zero issues.
2017-10-18
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diem
First Officer
Flight distance : 9439 ft
Greece
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try the 2.4GHz
2017-10-18
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nottuppaware
First Officer
Flight distance : 70745 ft
Australia
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With the right searching there is a way to change it to FCC mode - of course I wouldn’t do this because of regulations but
2017-10-18
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DJI-Jamie
DJI team
Flight distance : 112405 ft
United States
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Could you clarify what OS version you're running on your S7? Do you notice any difference in placing the S7 in airplane mode while having the Spark's WiFi connected?
2017-10-18
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Bupitz
lvl.2
Flight distance : 269304 ft
Germany
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@Sparky_17... you are in Canada and your drone is in FCC mode, we in Europe seems to be limited
@diem, I simply cannot connect to 2.4Ghz (see my other: post)  
@Jamie, Samsung S7 on Android 7.0 ... if you turn airplane mode on all the radios on the phone turn off (that means also WiFi)


2017-10-18
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m1n1s
Second Officer
Flight distance : 319915 ft
United Kingdom
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parabolic reflectors help on the remote and otg to your phone will resolve the issues.

http://www.ebay.co.uk/itm/Fold-A ... 2057872.m2749.l2649

i'm using these in high interference areas upto 750 meters but the remote is very directional to the Spark.
2017-10-18
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Scobo
lvl.2
Flight distance : 152795 ft
United Kingdom
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I would strongly recommend an OTG cable with android.
I get weak signal after 100m but with OTG, I can go much further with no issues.
2017-10-18
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El Diablo
First Officer

Germany
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Tip: the author has been banned or deleted automatically shield
2017-10-19
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wobbles
Captain
Flight distance : 545023 ft
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United Kingdom
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i have just got back form Cyprus had the same issues , i have Spark, Controller, and iphone 6s Plus ..changed to OTG cable had no issues at all.
2017-10-19
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DJI Elektra
Administrator
China
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Bupitz Posted at 2017-10-18 22:19
@Sparky_17... you are in Canada and your drone is in FCC mode, we in Europe seems to be limited
@diem, I simply cannot connect to 2.4Ghz (see my other: post)  
@Jamie, Samsung S7 on Android 7.0 ... if you turn airplane mode on all the radios on the phone turn off (that means also WiFi)

Please export the flight data for us to analyze. What is the version of your app?
2017-10-19
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Flip_L
lvl.4
Flight distance : 330686 ft
Germany
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El Diablo Posted at 2017-10-19 00:18
In EU the only way to connect to 2.4ghz is to use an OTG cable. The WiFi 5.8ghz band just... don't work. The OTG locks the RC to the phone at the 2.4ghz frecuencies, still not perfect if you flight in the city (WiFi interfeerences) but better than no flying at all. The downfall is that Dji is not supporting this officialy and it voids warranty so it is a tough call... void warranty or (a)void crashing?

This is not true for iOS. 2.4GHz works perfect with e.g. an iPhone
2017-10-19
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Bupitz
lvl.2
Flight distance : 269304 ft
Romania
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Where can I put the log file? It has 340MB. Thanks
2017-10-19
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El Diablo
First Officer

Germany
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Tip: the author has been banned or deleted automatically shield
2017-10-20
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Bupitz
lvl.2
Flight distance : 269304 ft
Romania
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DJI Elektra Posted at 2017-10-19 03:26
Please export the flight data for us to analyze. What is the version of your app?
https://www.youtube.com/watch?v=ngEHdAlAh9A

So, where can I put the logfile ?
2017-10-21
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Flip_L
lvl.4
Flight distance : 330686 ft
Germany
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El Diablo Posted at 2017-10-20 03:25
Can you define perfectly? In Munich I lose connection with my drone at about 100m... with my iPhone 7+

You mentioned that you can't use 2.4Ghz without an OTG cable. This is not true for iOS devices. I see you use an iPhone so you should be able to switch to 2.4GHz without any trouble. In the DJI GO app, just select 2.4GHz, scroll down and then choose the channel with the least interference (smallest green bar). After that your Sprak will reboot, your video feed will turn black and after it's done rebooting you're on 2.4GHz.

Can I define perfect? Well, yes: what I meant is basically what I've written above. It's easy to switch to 2.4GHz with a device running iOS.
I know what you mean though. You were thinking about range and image transmission quality. Well, I mainly fly in rural open areas with little to no interference at all, which means that the 2.4GHz band will perform very well and I can easily reach and surpass the given maximum range in CE of 500m (I have seen video footage of people reaching +1500m with their spark in Europe under ideal conditions).
But, flying in close vicinity to buildings with many different WiFi networks, bluetooth connections, etc. will definitely cause some trouble when using 2.4GHz as this is the band most WiFi routers use. So the available channels will get very busy (indicated by red bars in the DJI GO app) and thus lead to a poorer performance of the drone.
Using the 5.8GHz band in those situations should improve the performance a little, but bear in mind that when flying with 5.8GHz the maximum range for CE is 300m under ideal conditions. So don't expect too much. (I have used 5.8GHz on multiple occasions with mixed results. I'm only using it when I fly in the city and within 50m or so.)

Hope that helps,
Flip.
2017-10-23
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DJI Elektra
Administrator
China
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Bupitz Posted at 2017-10-21 23:11
So, where can I put the logfile ?

Please upload to dropbox and post the link here, you can also PM me the link. Thanks for your support.
2017-10-23
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heliman
First Officer
Denmark
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I often had connection loss already at 2-15 meters using 5.8GHz.
Using 2.4, as Flip_L says, I get beyond 1000 meters without a glitch.
Using iPhone without otg and without bluetooth, Apple watch in flight mode.
2017-10-23
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El Diablo
First Officer

Germany
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2017-10-23
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Bupitz
lvl.2
Flight distance : 269304 ft
Romania
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The link to the log file: https://www.dropbox.com/s/z67q1f ... 9_18-24-46.DAT?dl=0
2017-10-24
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DJI Thor
Administrator
Flight distance : 13602 ft
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Bupitz Posted at 2017-10-24 09:14
The link to the log file: https://www.dropbox.com/s/z67q1fa2qkgf2qy/DJI_ASSISTANT_EXPORT_FILE_2017-10-19_18-24-46.DAT?dl=0

Thank you, I'll forward to our engineers to see more details about the flight distance of your drone. Will get back to you once I hear something.
2017-10-25
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El Diablo
First Officer

Germany
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2017-10-26
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Sparky_17
Captain
Flight distance : 62349 ft
Canada
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El Diablo Posted at 2017-10-26 00:57
Nope, you have no issues because you are in Canada and the 5.8ghz channel works fine... hi is in Romania and in EU it doesn't (unless you flight your Spark in a remote location and away from civilization / wifi hubs).

Would this mean that in Europe everyone uses 5.8ghz for all WIFI and wireless devices?  Here in Canada most devices use 2.4ghz.  Even when I use 2.4 I have never experienced a disconnect issue.
2017-10-26
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El Diablo
First Officer

Germany
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2017-10-26
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Sparky_17
Captain
Flight distance : 62349 ft
Canada
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El Diablo Posted at 2017-10-26 05:23
No, in fact 5.8ghz is not commonly used or supported in EU, that's why we have so many problems. On the other hand, the 2.4ghz band is very 'busy' and the range is reduced extremelly. In my case and due to the fact that i live in the city center, even at 2.4ghz I get connection issues from approximately 60 to a 100m. In 5.8ghz I can just forget about flying altogether... I get problems sometimes at 2-3m away from me.

In addition the RC is limited via software (I believe) and produces less power than in Canada, that also contributes to the range and wifi issues.

Thanks for the clarifications and information.
2017-10-26
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davawt
lvl.4
Flight distance : 4885 ft
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United Kingdom
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Bupitz Posted at 2017-10-18 22:19
@Sparky_17... you are in Canada and your drone is in FCC mode, we in Europe seems to be limited
@diem, I simply cannot connect to 2.4Ghz (see my other: post)  
@Jamie, Samsung S7 on Android 7.0 ... if you turn airplane mode on all the radios on the phone turn off (that means also WiFi)

Hi there, I have found that when I use Airplane Mode it turns as you say everything off, but you can turn your wifi back on even while still in Airplane mode (try it)
Hope this helps, bye
davawt UK
2017-10-26
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DJI Thor
Administrator
Flight distance : 13602 ft
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Hi, Bupitz, I would like to add more info about the weak signal of the transmission. Please try to adjust the position of the antennas of the RC when you get signal weak, make sure the remote controller’s antennas are positioned parallel to and are pointed towards the aircraft; also try another place to fly, make sure that there aren't much of the interference. If the problem persists, please also help to provide the screenshot of the WiFi settings, and the data of the Blackbox. Thank you so much.
2017-10-26
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Bupitz
lvl.2
Flight distance : 269304 ft
France
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I have the antennas pointed correctly to the drone. Any news about the log I've sent? Got no reply until now.
2017-11-1
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S-e-ven
Captain
Flight distance : 3740030 ft
Thailand
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Bupitz Posted at 2017-11-1 07:11
I have the antennas pointed correctly to the drone. Any news about the log I've sent? Got no reply until now.

31m high, 31 m distance
45° angle from RC to AC
How do you point/hold the RC?

I wish, we had the option to point the antennas down to the ground, 45°
2017-11-1
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Arcicorsa
Second Officer
Flight distance : 235892 ft
Czechia
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S-e-ven Posted at 2017-11-1 07:49
31m high, 31 m distance
45° angle from RC to AC
How do you point/hold the RC?

bad thread.. sorry Please delete my post..
2017-11-1
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S-e-ven
Captain
Flight distance : 3740030 ft
Thailand
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Arcicorsa Posted at 2017-11-1 08:38
bad thread.. sorry Please delete my post..

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2017-11-1
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