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Range test and corrupted video on SD card
1976 28 2017-7-14
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Matioupi
First Officer
Flight distance : 922569 ft
France
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Hello,

I did a range test tonight (still with OTG and WiFi stuck in 5 GHz)

I made 2 "fly away", In Sport mode at 150 m altitude

During first one, I lost the link a about 530 m horizontal distance and recovered when aircraft was in RTH toward me

During second one (same flight) , I lost the link around 480 m and still recovered when aircraft in RTH.

I had a safe landing, and was quite happy with the range (considering it's 5.8 GHz in EU).

I've then been discharging the micro SD card, and the video of the flight is corrupted...
I don't know if this is related to loss of link or another reason. I'll will repeat the range test tomorow (today is too late) in order to see if the issue of corruped video on SD card is repeatable.

On the phone, I have 2 local cached videos of the flight, while I had only one file on the SD card.

Regards





2017-7-14
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GCBrent
lvl.4
Flight distance : 66286 ft
Australia
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where did you get the SD card from? I had an issue with fake SD cards I bought on ebay. Nearly all SD cards on ebay are fake. Bought my next ones from a camera shop.
2017-7-14
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CoreyB10
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Carry out a full format of any new SD card you use. I do it on camera's and my drones.
2017-7-15
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Matioupi
First Officer
Flight distance : 922569 ft
France
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I did format it in the beginning, not before this flight but before using it (and it's the card that was provided by DJI with fly more package)
First flights had no issues with the video on the SD.
As this flight were corrupted file occured was a long range test where link loss did occur, I'm wondering if this could be related (and I no time to retest yet...) I'll keep posting on this topic.
2017-7-15
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Matioupi
First Officer
Flight distance : 922569 ft
France
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I just had a new flight, same tests, but hopefully no file corruption that time.

I was able to go 650 m away before link broke (5.8 GHz)
2017-7-15
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GCBrent
lvl.4
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Australia
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I did over 1km away today. Quite impressed such a small bird can transmit that far!
2017-7-15
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Roli6
Second Officer
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Matioupi Posted at 2017-7-15 01:15
I just had a new flight, same tests, but hopefully no file corruption that time.

I was able to go 650 m away before link broke (5.8 GHz)

With the new Beta Firmware for the RC you got yesterday?
2017-7-15
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Matioupi
First Officer
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France
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Roli6 Posted at 2017-7-15 01:54
With the new Beta Firmware for the RC you got yesterday?

yes, and that was the limit I set in the App...
i'm increasing it gradually.
However, at that range, link is not so stable already
2017-7-15
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hallmark007
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Matioupi Posted at 2017-7-15 01:15
I just had a new flight, same tests, but hopefully no file corruption that time.

I was able to go 650 m away before link broke (5.8 GHz)

Spark should reach distance 300 meter 5.8 ghz 500meters in 2.4 ghz, so looks like you turned that on its head.
You should try test 2.4 ghz.
2017-7-15
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Matioupi
First Officer
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France
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hallmark007 Posted at 2017-7-15 02:04
Spark should reach distance 300 meter 5.8 ghz 500meters in 2.4 ghz, so looks like you turned that on its head.
You should try test 2.4 ghz.

http://www.phantomhelp.com/LogViewer/YIFCVBNXTT92T17OFQWG/

I which I can turn to 2.4 GHz in an easy way, but I have a 2.4 GHz phone only and it's PITA to full reset everything each time.
I'll wait until DJI solve this to try in 2.4 GHz
2017-7-15
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realstreetuk
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Matioupi Posted at 2017-7-15 01:15
I just had a new flight, same tests, but hopefully no file corruption that time.

I was able to go 650 m away before link broke (5.8 GHz)

Hi
What firmware do you have on both RC and AC?
Also which version of the dji go4 app are you using?
Thanks
2017-7-15
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Matioupi
First Officer
Flight distance : 922569 ft
France
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realstreetuk Posted at 2017-7-15 03:05
Hi
What firmware do you have on both RC and AC?
Also which version of the dji go4 app are you using?

RC : 1.00.0207 (seems to be a beta)
AC : 1.00.0400 (official release)

DJI Go App 4.1.3(275-gpPhone) on an Android 6.0.1 device (CAT S60)

RC to phone with OTG cable and phone in aircraft mode (WiFi + BlueTooth Off)
2017-7-15
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Roli6
Second Officer
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Wish i could test the RC 1.00.0207 too.
2017-7-15
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LukasON
Flight distance : 166660 ft
Czechia
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I have same configuration as you but I am able to do just 150m horizontal distance. Is there anything I can do to imrpove the range ?
2017-7-15
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Matioupi
First Officer
Flight distance : 922569 ft
France
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Only "ideas" that you are may already applying...

- try to optmize you RC handling/pointing with respect to the emission pattern of the antenna : the main proportion of transmitted RF power is transmitted in a direction perpendicular to the antenna sticks (not along it)
- try in an area where it's radio-frequency quiet
- OTG cable with phone WiFi and luetooth Off
- no other 2.4 or 5.8 devices next to you (other phone, smartwatch, etc)
2017-7-15
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rick bernotas
lvl.4
Flight distance : 194944 ft
United States
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I got a corrupted video a few days ago on my SD card as well.  It was from when I was trying to record in Sport mode.  All other videos captured in non Sport on the card were fine.

If I had to guess, there are bugs related to video capture in Sport mode.  The video was captured to my phone in 720 but the file was corrupted on the SD card.

SD card is a uhs Samsung card from B&H.  I format it all the time.
2017-7-15
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realstreetuk
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Matioupi Posted at 2017-7-15 03:10
RC : 1.00.0207 (seems to be a beta)
AC : 1.00.0400 (official release)

Thanks for the info
2017-7-15
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realstreetuk
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Roli6 Posted at 2017-7-15 03:18
Wish i could test the RC 1.00.0207 too.

Why can't you. I thought it was available to upgrade?
2017-7-15
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DJI Natalia
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realstreetuk Posted at 2017-7-15 05:47
Why can't you. I thought it was available to upgrade?

The official firmware will be released soon.
Some customers provided us their DJI accounts so we're able to push the beta to them.
2017-7-17
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DJI Natalia
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rick bernotas Posted at 2017-7-15 05:41
I got a corrupted video a few days ago on my SD card as well.  It was from when I was trying to record in Sport mode.  All other videos captured in non Sport on the card were fine.

If I had to guess, there are bugs related to video capture in Sport mode.  The video was captured to my phone in 720 but the file was corrupted on the SD card.

The video saved into the mobile device are cached video.
Just to verify, you turn off the drone after you stop recording, right?
It happens each time you fly it in S mode?
Could you please take a picture of the SD card you use?
2017-7-17
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realstreetuk
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DJI Natalia Posted at 2017-7-17 02:04
The official firmware will be released soon.
Some customers provided us their DJI accounts so we're able to push the beta to them.

can you please send me the beta if i give you my dji account? and will it be the same as the official firmware when it is released?
Thanks
2017-7-17
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DJI Natalia
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realstreetuk Posted at 2017-7-17 06:46
can you please send me the beta if i give you my dji account? and will it be the same as the official firmware when it is released?
Thanks

Yes, you could PM me your dji account.
2017-7-18
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realstreetuk
Second Officer
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DJI Natalia Posted at 2017-7-18 05:12
Yes, you could PM me your dji account.

Hi i have sent you my dji account details for beta firmware
2017-7-19
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DJI Natalia
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realstreetuk Posted at 2017-7-19 11:52
Hi i have sent you my dji account details for beta firmware

Thank you.
2017-7-20
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djiuser_lJBCCA9
lvl.1

Ukraine
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looks interesting
2017-7-20
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realstreetuk
Second Officer
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Not received it yet?
2017-7-20
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DJI Natalia
Administrator
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Sorry to tell you that the firmware test has finished.
We'll release the official firmware soon, please wait patiently, appreciate your support!
2017-7-21
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Malakai_UK
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DJI Natalia Posted at 2017-7-21 04:42
Sorry to tell you that the firmware test has finished.
We'll release the official firmware soon, please wait patiently, appreciate your support!

wooo,how soon are we talking? hours days or weeks? I have a planned flight today and some over the weekend. I dont want to be messing about with firmware updates while im out in the field.
2017-7-21
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Malakai_UK
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Are you stopping the recording before you turn the spark off?
2017-7-21
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