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Return to Home possible malfunction - Need HELP!

flynsign

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I was testing out the run time on my new Mavic in my backyard today. I had it directly over its home point and was only 4' in the air. The problem was at 15% battery, it started ascending and moving far away from its home point.

I was able to cancel RTH just in time as the battery got down to 11% before I was able to get it back to me. This does not sound right AT ALL. Please tell me if I have a defective unit or not or if there was something I did wrong.
 

msinger

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Let's take a look at your TXT flight log. Please upload it here and post a link back here.
 
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flynsign

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hmmm, no idea where to find that...
 

msinger

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See my link above.
 

flynsign

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I saw the 'browse' button from your link, but I'm on my laptop not the ipad mini I was using with my controller
 

mlaczek

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I saw the 'browse' button from your link, but I'm on my laptop not the ipad mini I was using with my controller
"Need help finding your flight log? For Android devices, connect your device to a computer via a USB cable and go to "DJI/dji.pilot/FlightRecord". For Apple devices, see this video for instructions on retrieving your log from iTunes. After retrieving your log, click the "Browse..." button above to upload it (don't upload it at HealthyDrones.com)."

you can find your flight log on your sd card. sd card what is in the mavic. and if you connect your mavic to the computer and start the assistant 2 dji software, you can find the logs.
 
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msinger

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I saw the 'browse' button from your link, but I'm on my laptop not the ipad mini I was using with my controller
You'll need to retrieve the TXT flight log from your iPad Mini using iTunes.
 

flynsign

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OK, I uploaded the file. How would you analyze this in order to detect what went wrong?
 

msinger

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Please post a link back here so we can see your uploaded flight log.
 

flynsign

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You mean the flight record file I already uploaded via your link?
 

msinger

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Yes. After uploading your fight log, you'll need to copy and paste the URL from your web browser. Otherwise, nobody else will be able to find it.
 

flynsign

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It's a file in a folder on my desktop - no URL involved.

Bottom line is I just need to know when my battery was low, what would cause my Mavic to automatically ascend to 30meters and fly several yards away from its Home Point when it was hovering 4 ft over it's home point the entire flight. It is SUPPOSED to not ascend when it is within a certain (close) distance and altitude when RTH is activated, either automatically or through operator, correct?
 

msinger

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It is SUPPOSED to not ascend when it is within a certain (close) distance and altitude when RTH is activated, either automatically or through operator, correct?
Ah, well, if that's all you need to know -- no, it's not supposed to ascend when it's directly over the home point.
 

flynsign

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So now I'm worried that it has a bug of some kind and can no longer trust it if it malfunctions on something as basic as this. :(
 

msinger

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There's no need to worry. If you review your flight log, it'll most likely reveal what happened.
 

flynsign

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Not sure what to look for but here it is:

A 00m 00s 0.0 ft 0 ft Mode Mode changed to Motors_Started
B 00m 00s 0.0 ft 0 ft Tip Tips__Taking Off
C 00m 00s 0.0 ft 0 ft Warning The aircraft is in a Warning Zone (Class E). Fly with caution here.
D 00m 01s 0.0 ft 1 ft Mode Mode changed to AutoTakeoff
E 00m 01s 0.0 ft 1 ft Tip Tips__Taking Off
F 00m 01s 0.0 ft 1 ft Tip Home Point Recorded. RTH Altitude: 30m.
G 00m 04s 3.6 ft 4 ft Mode Mode changed to GPS_Atti
H 00m 34s 3.9 ft 14 ft Warning Camera Settings Adjusted to ActiveTrack
I 00m 43s 3.9 ft 16 ft Mode Mode changed to Joystick
J 00m 43s 3.9 ft 16 ft Mode Mode changed to ActiveTrack
K 00m 57s 3.9 ft 15 ft Mode Mode changed to GPS_Atti
L 01m 12s 3.9 ft 16 ft Warning ActiveTrack Flight Ended:Cannot find subject
M 03m 27s 3.9 ft 26 ft Mode Mode changed to Joystick
N 03m 27s 3.9 ft 26 ft Mode Mode changed to ActiveTrack
O 05m 12s 3.9 ft 24 ft Warning Camera Settings Adjusted to ActiveTrack
P 06m 09s 3.9 ft 21 ft Data Loss Downlink data connection lost for 57 seconds
Q 06m 09s 3.9 ft 21 ft Mode Mode changed to GPS_Atti
R 06m 21s 3.9 ft 20 ft Data Loss Downlink data connection lost for 8.1 seconds
S 06m 42s 3.9 ft 22 ft Warning Camera Settings Adjusted to ActiveTrack
T 06m 49s 3.9 ft 22 ft Warning Camera Settings Adjusted to ActiveTrack
U 07m 07s 3.9 ft 23 ft Data Loss Downlink data connection lost for 18 seconds
V 07m 29s 3.9 ft 23 ft Mode Mode changed to Joystick
W 07m 29s 3.9 ft 23 ft Mode Mode changed to ActiveTrack
X 08m 21s 3.9 ft 21 ft Mode Mode changed to GPS_Atti
Y 08m 25s 3.9 ft 20 ft Mode Mode changed to Joystick
Z 08m 25s 3.9 ft 20 ft Mode Mode changed to ActiveTrack
a 08m 29s 3.9 ft 20 ft Mode Mode changed to GPS_Atti
b 08m 32s 3.9 ft 19 ft Mode Mode changed to Joystick
c 08m 32s 3.9 ft 19 ft Mode Mode changed to ActiveTrack
d 08m 47s 3.9 ft 19 ft Mode Mode changed to GPS_Atti
e 08m 47s 3.9 ft 18 ft Mode Mode changed to Joystick
f 08m 47s 3.9 ft 18 ft Mode Mode changed to ActiveTrack
g 08m 52s 3.9 ft 18 ft Mode Mode changed to GPS_Atti
h 08m 52s 3.9 ft 18 ft Mode Mode changed to Joystick
i 08m 52s 3.9 ft 18 ft Mode Mode changed to ActiveTrack
j 09m 11s 3.9 ft 20 ft Mode Mode changed to GPS_Atti
k 09m 12s 3.9 ft 20 ft Mode Mode changed to Joystick
l 09m 12s 3.9 ft 20 ft Mode Mode changed to ActiveTrack
m 09m 52s 3.9 ft 21 ft Warning Camera Settings Adjusted to ActiveTrack
n 10m 16s 3.9 ft 26 ft Data Loss Downlink data connection lost for 24 seconds
o 10m 16s 3.9 ft 26 ft Mode Mode changed to GPS_Atti
p 10m 31s 3.9 ft 24 ft Warning Camera Settings Adjusted to ActiveTrack
q 10m 48s 3.9 ft 24 ft Data Loss Downlink data connection lost for 17 seconds
r 11m 17s 3.9 ft 24 ft Data Loss Downlink data connection lost for 28.3 seconds
s 12m 06s 3.9 ft 25 ft Warning Camera Settings Adjusted to ActiveTrack
t 13m 34s 3.9 ft 22 ft Warning Camera Settings Adjusted to ActiveTrack
u 13m 46s 3.9 ft 20 ft Warning Cannot track subject:Subject too Small. Get Closer and retry
v 14m 18s 6.9 ft 24 ft Warning Cannot track subject:Cannot Identify Subject
w 15m 03s 6.9 ft 27 ft Mode Mode changed to Joystick
x 15m 03s 6.9 ft 27 ft Mode Mode changed to ActiveTrack
y 16m 53s 6.9 ft 27 ft Mode Mode changed to GPS_Atti
z 16m 54s 6.9 ft 27 ft Mode Mode changed to Joystick
A 16m 54s 6.9 ft 27 ft Mode Mode changed to ActiveTrack
B 16m 54s 6.9 ft 27 ft Warning Warning:Subject lost. Searching ...
C 16m 55s 6.9 ft 27 ft Mode Mode changed to GPS_Atti
D 16m 55s 6.9 ft 27 ft Mode Mode changed to Joystick
E 16m 55s 6.9 ft 27 ft Mode Mode changed to ActiveTrack
F 16m 55s 6.9 ft 27 ft Warning Warning:Subject lost. Searching ...
G 16m 56s 6.9 ft 27 ft Mode Mode changed to GPS_Atti
H 16m 59s 6.9 ft 28 ft Mode Mode changed to Joystick
I 16m 59s 6.9 ft 28 ft Mode Mode changed to ActiveTrack
J 17m 00s 6.9 ft 28 ft Warning Warning:Subject lost. Searching ...
K 17m 00s 6.9 ft 28 ft Mode Mode changed to GPS_Atti
L 17m 01s 6.9 ft 28 ft Mode Mode changed to Joystick
M 17m 01s 6.9 ft 28 ft Mode Mode changed to ActiveTrack
N 17m 45s 6.9 ft 30 ft Mode Mode changed to GPS_Atti
O 17m 51s 6.9 ft 30 ft Warning Warning:Subject lost. Searching ...
P 17m 51s 6.9 ft 30 ft Mode Mode changed to Joystick
Q 17m 52s 6.9 ft 30 ft Mode Mode changed to ActiveTrack
R 17m 52s 6.9 ft 30 ft Mode Mode changed to GPS_Atti
S 17m 54s 6.9 ft 30 ft Mode Mode changed to Joystick
T 17m 54s 6.9 ft 30 ft Mode Mode changed to ActiveTrack
U 17m 54s 6.9 ft 30 ft Mode Mode changed to GPS_Atti
V 17m 54s 6.9 ft 30 ft Mode Mode changed to Joystick
W 17m 54s 6.9 ft 30 ft Mode Mode changed to ActiveTrack
X 18m 01s 6.9 ft 30 ft Warning Warning:Subject lost. Searching ...
Y 18m 01s 6.9 ft 30 ft Mode Mode changed to GPS_Atti
Z 18m 04s 6.9 ft 29 ft Mode Mode changed to Joystick
a 18m 04s 6.9 ft 29 ft Mode Mode changed to ActiveTrack
b 18m 04s 6.9 ft 29 ft Mode Mode changed to GPS_Atti
c 18m 04s 6.9 ft 29 ft Mode Mode changed to Joystick
d 18m 04s 6.9 ft 29 ft Mode Mode changed to ActiveTrack
e 18m 27s 7.2 ft 29 ft Mode Mode changed to GPS_Atti
f 18m 27s 7.2 ft 29 ft Mode Mode changed to Joystick
g 18m 27s 7.2 ft 29 ft Mode Mode changed to ActiveTrack
h 18m 28s 6.9 ft 30 ft Mode Mode changed to GPS_Atti
i 18m 29s 6.9 ft 30 ft Mode Mode changed to Joystick
j 18m 29s 6.9 ft 30 ft Mode Mode changed to ActiveTrack
k 18m 29s 6.9 ft 29 ft Mode Mode changed to GPS_Atti
l 18m 30s 6.9 ft 29 ft Mode Mode changed to Joystick
m 18m 30s 6.9 ft 29 ft Mode Mode changed to ActiveTrack
n 18m 32s 6.9 ft 29 ft Mode Mode changed to GPS_Atti
o 18m 34s 3.3 ft 29 ft Mode Mode changed to Joystick
p 18m 34s 3.3 ft 29 ft Mode Mode changed to ActiveTrack
q 18m 49s 3.3 ft 27 ft Mode Mode changed to GPS_Atti
r 18m 50s 5.6 ft 27 ft Mode Mode changed to Joystick
s 18m 51s 5.6 ft 27 ft Mode Mode changed to ActiveTrack
t 19m 02s 5.9 ft 26 ft Mode Mode changed to GPS_Atti
u 19m 03s 3.3 ft 26 ft Mode Mode changed to Joystick
v 19m 04s 3.0 ft 26 ft Mode Mode changed to ActiveTrack
w 19m 16s 3.0 ft 27 ft Mode Mode changed to GPS_Atti
x 19m 17s 3.0 ft 27 ft Mode Mode changed to Joystick
y 19m 18s 3.0 ft 27 ft Mode Mode changed to ActiveTrack
z 19m 18s 3.0 ft 26 ft Mode Mode changed to GPS_Atti
A 19m 19s 3.0 ft 27 ft Mode Mode changed to Joystick
B 19m 19s 3.0 ft 27 ft Mode Mode changed to ActiveTrack
C 19m 36s 3.0 ft 27 ft Warning Camera Settings Adjusted to ActiveTrack
D 19m 43s 3.0 ft 26 ft Data Loss Downlink data connection lost for 7 seconds
E 19m 43s 3.0 ft 26 ft Mode Mode changed to GPS_Atti
F 21m 50s 2.3 ft 24 ft Warning Warning:The remaining battery is only enough for RTH. Return home now.
G 22m 00s 2.3 ft 23 ft Mode Mode changed to Go_Home
H 22m 00s 2.3 ft 23 ft Tip Tips__Low Power. Returning to Home Point
I 22m 15s 32.5 ft 1 ft Mode Mode changed to GPS_Atti
J 22m 15s 32.5 ft 2 ft Warning Warning:The remaining battery is only enough for RTH. Return home now.
K 23m 23s 2.6 ft 24 ft Mode Mode changed to AutoLanding
L 23m 23s 2.6 ft 24 ft Tip Tips__Critically Low Power. Aircraft Landing
 

msinger

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Your TXT flight log includes more information. It would be best to review that instead.
 

Oingo Boingo

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Ok... just a quick bit of info on runtime. I know the logs will give more info and I know ur concern is the waypoint issue. I've had that as well. It could be a compass issue.. or a phone GPS issue. BUT just want to quickly bring up a point here. LIPO batteries as nasty puppies. The quickest way to damage ur MP batteries would be to run them past 15% power left. I can get SUPER technical and explain why, but I don't run any of my craft beyond or below a 25 to 20 % remaining power. I've seen pilots testing max runtime and drain the batteries beyond 15%. Then 3 flights later they would be flying the craft and would hit 25% power.... then boom it would drop from 25% to 10% in 5 secs flat... And then havoc strikes. Always be safe with lipos. Never drain them to low as it damages the individual cells in the batteries

Sent from my HUAWEI NXT-L09 using MavicPilots mobile app
 
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Strafe1

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It's a file in a folder on my desktop - no URL involved.

Bottom line is I just need to know when my battery was low, what would cause my Mavic to automatically ascend to 30meters and fly several yards away from its Home Point when it was hovering 4 ft over it's home point the entire flight. It is SUPPOSED to not ascend when it is within a certain (close) distance and altitude when RTH is activated, either automatically or through operator, correct?

I know you want the quick answer to your dilemma, but there is no answer without knowing what the status of your inputs , the craft and your battery were at the time. The aforementioned logs have the answer, and @msinger can read them. If you just post the info as described, the sooner you'll know. These guys know what's going on!
 
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