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Altitude error, Show incorrect height
3422 24 2018-5-27
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RBA
lvl.1
Flight distance : 8369 ft
Denmark
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Altitude error. Show incorrect height.
Just got my Spark and have use the last few dayes to learn it.
But it makes a error I can´t fix, it show incorrect height when I get up over the 5 meter.
  So when I try to use the RTH function it just goes up (height is set to  30meter) but it goes up to 100meter and maybe more befor I stop it.
I have calibrated the IMU and Compas, I fly with controller with Wifi (The OTG cable is the mail)
33583332_10217050297955513_3130225268300447744_n_resize.png
33583338_10217050297875511_3075991140000858112_n_resize.png
33706100_10217050298315522_6742020003748380672_n_resize.png
2018-5-27
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JJBspark
Captain
Flight distance : 1549747 ft
Netherlands
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Hi,

just a silly question, are the bottom sensors clean? all the protective tape removed?

If you like post your flight record on here, so this forum can mayby tell you more.

link > http://www.phantomhelp.com/LogViewer/Upload/
post your uploaded link afterwards on here.

cheers
JJB
2018-5-27
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RBA
lvl.1
Flight distance : 8369 ft
Denmark
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JJBspark Posted at 2018-5-27 00:32
Hi,

just a silly question, are the bottom sensors clean? all the protective tape removed?

Not so silly, I had to check it but yes the tape is remove and the are clean.

http://www.phantomhelp.com/LogViewer/9LAG5EI24W46433TPTRL/
2018-5-27
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RBA
lvl.1
Flight distance : 8369 ft
Denmark
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2018-5-27
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RBA
lvl.1
Flight distance : 8369 ft
Denmark
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RBA Posted at 2018-5-27 01:49
Not so silly, I had to check it but yes the tape is remove and the are clean.

http://www.phantomhelp.com/LogViewer/9LAG5EI24W46433TPTRL/

I can not find the fligt from today on my phone.
2018-5-27
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SubUser
lvl.4
Flight distance : 74140 ft
Netherlands
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You have two kind of sensor to measure the altitude :
For the lower height (your 5 meter) is the optical sensor or the ultra sound sensor ( on old models).
For the high height is a pressure sensor (barometer) like in the real airplanes.

It looks like your barometer is faulty.

It is very dangerous to fly without it, you could easily end up in in a no fly area (above 120 meter) or fall out the sky. If the GPS or the compass is off, you go into altitude mode, you basicly flying only on your barometer (beside the giro-scoop of course).

Contact your dealer or DJI.
2018-5-27
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JJBspark
Captain
Flight distance : 1549747 ft
Netherlands
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Hiya,

Barometer is doing fine, your optical sensor heigth is indicating height all flight. It should become "empty " when flying higher than this sensor range.
Guess software uses that height if its there as reference height as it is more accurate than barometer height at low altitude.

I would refresh the firmware and try again.

Question about this flight ; why did the app start the autolanding? 42% batt power enough to fly further in time....

see the VPS height line in my chart.

cheers
JJB
analysis1.png
2018-5-27
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SubUser
lvl.4
Flight distance : 74140 ft
Netherlands
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JJBspark Posted at 2018-5-27 04:34
Hiya,

Barometer is doing fine, your optical sensor heigth is indicating height all flight. It should become "empty " when flying higher than this sensor range.

Nice program,

What is a novice mode ?

Did you make the program yourself ?
2018-5-27
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JJBspark
Captain
Flight distance : 1549747 ft
Netherlands
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SubUser Posted at 2018-5-27 06:15
Nice program,

What is a novice mode ?

Hi,

Novice mode is the beginner mode.
yes, its my own analysis tool, will be updated on here the coming weeks.

cheers
JJB
2018-5-27
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JDavidTX
lvl.4
Flight distance : 604495 ft
United States
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Your log looks similar the once I had before I sent mine in.  Turned out to be a mainboard failure.  And SubUser is right its dangerous to fly if you're having a problem.  Mine would act fine and then all of a sudden fall out of the air and loose power.  Other times it just acted like it didn't have enough power to even stay stable and hover.
2018-5-27
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RBA
lvl.1
Flight distance : 8369 ft
Denmark
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JJBspark Posted at 2018-5-27 04:34
Hiya,

Barometer is doing fine, your optical sensor heigth is indicating height all flight. It should become "empty " when flying higher than this sensor range.

Hi

It was me how push the auto landing to test it, it was before I known there was a problem with the altitude.

How do I reinstall the firmware?
2018-5-27
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JJBspark
Captain
Flight distance : 1549747 ft
Netherlands
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RBA Posted at 2018-5-27 21:15
Hi

It was me how push the auto landing to test it, it was before I known there was a problem with the altitude.

Use DJI assistent on your computer. [ https://www.dji.com/mavic-air/info#downloads ]

Ok, did you pushed autolanding on the remote or did you use the soft button in the app?
(just asking for my analysis tool).

Cheers
JJB

2018-5-27
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RBA
lvl.1
Flight distance : 8369 ft
Denmark
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JJBspark Posted at 2018-5-27 22:16
Use DJI assistent on your computer. [ https://www.dji.com/mavic-air/info#downloads ]

Ok, did you pushed autolanding on the remote or did you use the soft button in the app?

I think it was on the app.

I have tryet to find, download and install the DJI assistent, but all 3 things is no easy and I ever got it install because windows dont known the file type.
2018-5-27
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JJBspark
Captain
Flight distance : 1549747 ft
Netherlands
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RBA Posted at 2018-5-27 22:21
I think it was on the app.

I have tryet to find, download and install the DJI assistent, but all 3 things is no easy and I ever got it install because windows dont known the file type.

this apk file if the DJI go app for Android, you have to download assistent2
2018-5-27
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RBA
lvl.1
Flight distance : 8369 ft
Denmark
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JJBspark Posted at 2018-5-27 22:41
this apk file if the DJI go app for Android, you have to download assistent2

Do you have a link?
2018-5-27
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JJBspark
Captain
Flight distance : 1549747 ft
Netherlands
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RBA Posted at 2018-5-27 22:42
Do you have a link?

yes...now as a picture
Afbeelding 1.png
2018-5-27
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RBA
lvl.1
Flight distance : 8369 ft
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JJBspark Posted at 2018-5-27 23:04
yes...now as a picture

Thanks got the program.

Downgrade the firmware, Triet with my old phone and my new phone, still error

Upgade the firmware, triet with both phones, still error

Sent it back to the shop now and will get a new one.

Thanks for the help ;-)
2018-5-28
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JJBspark
Captain
Flight distance : 1549747 ft
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RBA Posted at 2018-5-28 00:28
Thanks got the program.

Downgrade the firmware, Triet with my old phone and my new phone, still error

my pleasaure, Good luck with getting a better one!
2018-5-28
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RBA
lvl.1
Flight distance : 8369 ft
Denmark
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Update, got a new one and that work perfect.
2018-6-10
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Diesel18
lvl.1
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JJBspark Posted at 2018-5-27 04:34
Hiya,

Barometer is doing fine, your optical sensor heigth is indicating height all flight. It should become "empty " when flying higher than this sensor range.

I am having the exact same problem.  Would you be able to run your tool on my data and if so, how do I get you the data?
2018-10-13
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JJBspark
Captain
Flight distance : 1549747 ft
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Diesel18 Posted at 2018-10-13 04:52
I am having the exact same problem.  Would you be able to run your tool on my data and if so, how do I get you the data?

hi Diesel, just upload your flightlog on here.

use this > http://www.phantomhelp.com/LogViewer/Upload/

cheers
JJB
2018-10-13
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Avianajunior
lvl.1
Brazil
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Hi JJBspark!
I have the same problem that RBA reported here. Could you help me with your analysis?
2018-11-4
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temike
lvl.1
Flight distance : 9393 ft

Hungary
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Hi, it seems I have the same problem. Could you help me? Should I worry?  

My drone started to lose control, it constantly went upwards, as the app said the altitude has not changed. When I realized that I lost control of the altitude I immediately started to pull it down, eventually causing it to descend, but after a while rather to fall. I pushed the lever up, and could eventually reach to a normal landing. This happened multiple times. I flied it up, it lost control after a certain altitude, started to go up very fast, the app said the altitude is the same, and after I pulled down, it started to fall.
2019-5-2
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chris333j
lvl.2

France
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Hi, after update the last firmware into my spark and try the "gesture piloting" in dji go 4 i have the same problem : strange height, no front off obstacle and no landing "bip". All seem to be desactivated . I try to change firmware, reset factory, uninstall dji go... no effect (( Could you help me plz ? https://youtu.be/zX5XEKwzVI0
2019-10-19
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Jakab Gipsz
First Officer

Hungary
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JDavidTX Posted at 2018-5-27 19:29
Your log looks similar the once I had before I sent mine in.  Turned out to be a mainboard failure.  And SubUser is right its dangerous to fly if you're having a problem.  Mine would act fine and then all of a sudden fall out of the air and loose power.  Other times it just acted like it didn't have enough power to even stay stable and hover.

This is prototype issue on Spark (among many others).
For me it started with taking off with uncertainty and fluctuations in altitude. Then I flew for 4-5 minutes and then suddenly the height began to fall and in vain I pushed up the Stick, landed in an unsuitable place and the propellers crashed. No error in log, just abruptly ...
My Spark for sale!

2019-10-20
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