Sudden strong interference
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1255 11 2020-3-12
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Ronny123
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  1#
So nearly crapped my pants today, third flight with my drone so i was in sport mode and was flying farther away then ever (3-400) meters, but intermittent videoloss caused me to freak out, so i turned.


On my way back i was like 50meters away when i went straight up just to get a overview shot, i was at about 200meters height (i know now thats not legal here), when signal suddenly was lost.
And i was moving all over the place, changing antenna angles, controller angle nothing seemed to help, then suddenly i got a short image and data telling me the drone was at 400meters (which was the limit i had set), then gone again for ten minutes or so, then a short image again with battery low warning, return now and all other bad news.

After another couple of minutes the i finally got eyesight of the drone as it was landing straight down, (no return to home), and i was able to maneovre it over to where i was, stressed and with like 4% battery remaining and some windgust i pushed it down and a gust threw it into the fence breaking some propellers, battery popped out, but drone survived.

Unfortunately i ran out of sd space so the last 5minutes of the flight was not recorded.
But looking at the logs i see 0 Satelites

Did someone jam me?
And was 0 gps signal the reason the drone flew to max height and did not return home?


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2020-3-12
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DJI Paladin
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  2#
Hi. I am sorry for the trouble this has caused. With regards to this concern. I would recommend to please try flying the drone in a different location with less interference. There might be power lines, metals or electronic devices that generates signal that can interfere with your connection during flight. In addition. I will be posting an official DJI video tutorial for the best practices when flying the drone. Please keep us posted for further assistance. Thank you.

2020-3-12
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Ronny123
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  3#
DJI Paladin Posted at 3-12 10:37
Hi. I am sorry for the trouble this has caused. With regards to this concern. I would recommend to please try flying the drone in a different location with less interference. There might be power lines, metals or electronic devices that generates signal that can interfere with your connection during flight. In addition. I will be posting an official DJI video tutorial for the best practices when flying the drone. Please keep us posted for further assistance. Thank you.

https://www.youtube.com/watch?v=P7M9JtfVwQE

Thanks, that explained why i lost control of the drone.
@1:20 in the movie, so going high while the drone is close is not a good idea.

But still 0 GPS and no return to home because of signal loss is a mystery.
do i need to configure anything to have return to home?
On the minimap on my phone it clearly said H (home) where i was located.
2020-3-12
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JJB*
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  4#
Hi Ronny,

Would be interesting to see what the log wil tell.
If you like upload your flightlog using this link > https://www.phantomhelp.com/LogViewer/Upload/

Good for you to have the drone back, but sorry for the damage.

cheers
JJB
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  5#
Ronny123 Posted at 3-12 11:08
Thanks, that explained why i lost control of the drone.
@1:20 in the movie, so going high while the drone is close is not a good idea.

Hi. Thank you for the additional inquiry. With regards to this concern. For us to get more details about this incident, I would recommend for you to contact our DJI Support Team to assist you regarding this matter and please sync your flight records. Please note that DJI will not be able to perform data analysis for cases occurring after the expiry of the warranty period of the drone. Again, I am sorry for the trouble and thank you for your understanding.
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Geebax
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  6#
Ronny123 Posted at 3-12 11:08
Thanks, that explained why i lost control of the drone.
@1:20 in the movie, so going high while the drone is close is not a good idea.

'Thanks, that explained why i lost control of the drone."

No, it does not explain it. But if you actually had 0 satellites, that would exlplain why it did not return home, the aircraft cannot return home without GPS satellite reception. But as JJB* says, post your log then we can get a better idea.
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Ronny123
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  7#
Geebax Posted at 3-12 14:22
'Thanks, that explained why i lost control of the drone."

No, it does not explain it. But if you actually had 0 satellites, that would exlplain why it did not return home, the aircraft cannot return home without GPS satellite reception. But as JJB* says, post your log then we can get a better idea.

-.119 :    9488 [L-FMU/MOTOR]Start. reason:ACT.Takeoff
-.119 :    9488 tilt when motor on = 0.021474, static flag = 1
-.119 :    9488 [L-FDI][CTRL] event: near ground turn on
-.115 :    9488 [L-FMU/FSM]state changed. cur: on ground
-.099 :    9489 [L-IOC]Set CL.  62.2 Degree
-.099 :    9489 [L-TAKEOFF]alti: 347.777496
-.099 :    9489 [L-HOME]Update. lati: 1.0458506 longti: 0.1883869 alti:367.78
.081 :    9498 [L-FMU/LED]action changed. set home0)
1.581 :    9573 [L-FMU/LED]action changed. Normal Flash(0)
1.881 :    9588 [L-FLYMODE][Ctrl<6>] REQ_APP_WM610 AUTO_TAKEOFF_HOLD ctrl_auto_takeoff
2.810 :    9634 [L-FMU/FSM]state changed. cur: in air
2.820 :    9635 [FDI][IMU] set imu switch level = 8
2.821 :    9635 [L-FDI][FDI CTRL] event: impact turn on
4.781 :    9733 [L-FLYMODE]CTRL reset all by reach target height
4.801 :    9734 [L-FLYMODE][Ctrl<1>] REQ_RC_NORMAL ATTI_HOLD ctrl_gps_atti
5.038 :    9745 [L-NS][AHRS]height max obv num [3/16]
32.770 :   11132 [L-FMU/FSM]not near ground
40.160 :   11502 [L-GPS](0)Lost. Reason:compass yaw err large
40.540 :   11521 [L-GPS](0)Lost. Reason:gps disable
40.932 :   11540 [L-NS][AHRS] yaw aligned 1
42.740 :   11631 [L-GPS](0)Lost. Reason:compass yaw err large
42.960 :   11642 [L-GPS](0)Lost. Reason:gps disable
43.540 :   11671 [L-GPS](0)Lost. Reason:compass yaw err large
44.340 :   11711 [L-GPS](0)Lost. Reason:gps disable
52.740 :   12131 [L-GPS](0)Lost. Reason:compass yaw err large
52.940 :   12141 [L-GPS](0)Lost. Reason:gps disable
78.160 :   13402 [L-GPS](0)Lost. Reason:compass yaw err large
78.360 :   13412 [L-GPS](0)Lost. Reason:gps disable
81.140 :   13551 [L-GPS](0)Lost. Reason:compass yaw err large
81.560 :   13572 [L-GPS](0)Lost. Reason:gps disable
82.501 :   13619 [L-FDI][FDI][CTRL]: fault off, height_ctrl_fail
85.960 :   13792 [L-GPS](0)Lost. Reason:compass yaw err large
86.360 :   13812 [L-GPS](0)Lost. Reason:gps disable
93.760 :   14182 [L-GPS](0)Lost. Reason:compass yaw err large
93.940 :   14191 [L-GPS](0)Lost. Reason:gps disable
104.520 :   14720 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , range
106.320 :   14810 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , conformity
106.720 :   14830 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, conformity
109.920 :   14990 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, range
110.120 :   15000 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , conformity
110.320 :   15010 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, conformity
192.401 :   19114 app connect changed:last(1) != current(0)
195.401 :   19264 [L-FLYMODE][Ctrl<8>] REQ_RC_LOST NAVI_GO_HOME ctrl_navi_go_home
196.101 :   19299 [L-FMU/LED]action changed. rc completely lost0)
220.321 :   20510 app connect changed:last(0) != current(1)
221.302 :   20559 [L-FMU/LED]action changed. Normal Flash(0)
230.021 :   20995 app connect changed:last(1) != current(0)
232.101 :   21099 [L-FMU/LED]action changed. rc completely lost0)
300.920 :   24540 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , stuck
301.121 :   24550 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, stuck
370.261 :   28007 app connect changed:last(0) != current(1)
371.301 :   28059 [L-FMU/LED]action changed. Normal Flash(0)
371.681 :   28078 app connect changed:last(1) != current(0)
374.901 :   28239 [L-FMU/LED]action changed. rc completely lost0)
388.341 :   28911 app connect changed:last(0) != current(1)
389.502 :   28969 [L-FMU/LED]action changed. Normal Flash(0)
393.581 :   29173 app connect changed:last(1) != current(0)
396.702 :   29329 [L-FMU/LED]action changed. rc completely lost0)
529.320 :   35960 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , stuck
529.721 :   35980 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, stuck
843.720 :   51680 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , stuck
843.920 :   51690 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, stuck
919.561 :   55472 app connect changed:last(0) != current(1)
920.161 :   55502 app connect changed:last(1) != current(0)
1094.379 :   bcfb4 <FLY>-------NOTICE:comm_cfg_decoder_usb decodeid(0) statis -------
1094.399 :   bcfc0 <FLY>-------NOTICE:comm_cfg_decoder_rou decodeid(1) statis -------
1094.419 :   bcfcc <FLY>-------NOTICE:comm_cfg_decoder_obj decodeid(2) statis -------
1094.439 :   bcfd8 <FLY>-------NOTICE:comm_imu_decoder_obj decodeid(3) statis -------
1094.439 :   bcfd8 <FLY>-------NOTICE:vision_decoder_objec decodeid(4) statis -------
1094.459 :   bcfe4 <FLY>-------NOTICE:bat_decoder_object_i decodeid(5) statis -------
1094.459 :   bcfe4 <FLY>-------NOTICE:ecs_bus_init decodeid(6) statis -------
1302.261 :   74607 app connect changed:last(0) != current(1)
1302.861 :   74637 app connect changed:last(1) != current(0)
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Ronny123
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  8#
And second log file:
21.999 :   e330d <FLY>Mc  ID  :07JDD8S00101TR
21.999 :   e330d <FLY>Mc  Ver :v3.1.10.93
21.999 :   e330d <FLY>Bat Ver :v255.255.255.255
21.999 :   e330d <FLY>svn Ver :f824fd4656cb8e42128d3450985004f754a3f2f3
21.999 :   e330d <FLY>Time    :commit:2016-07-07 16:39:58 /build:2016-07-07 16:41:31
33.299 :   77820 app connect changed:last(0) != current(1)
33.959 :   77853 app connect changed:last(1) != current(0)
65.799 :   79445 app connect changed:last(0) != current(1)
66.879 :   79499 [L-FMU/LED]action changed. battery warning!:battery_status_data.capacity_level1_status
79.579 :   80134 [L-FLYMODE][Ctrl<11>] REQ_BATTERY NAVI_GO_HOME ctrl_navi_go_home
107.099 :   81510 [L-FLYMODE]CTRL reset all by rc mode switch
107.119 :   81511 [L-FLYMODE][Ctrl<1>] REQ_RC_NORMAL ATTI ctrl_atti
107.219 :   81516 [L-FLYMODE]CTRL reset all by rc mode switch
107.219 :   81516 [L-FLYMODE][Ctrl<1>] REQ_RC_NORMAL ATTI_HOLD ctrl_gps_atti
107.679 :   81539 app connect changed:last(1) != current(0)
110.081 :   81659 [L-FMU/LED]action changed. rc completely lost0)
110.679 :   81689 [L-FLYMODE][Ctrl<8>] REQ_RC_LOST NAVI_GO_HOME ctrl_navi_go_home
119.459 :   82128 app connect changed:last(0) != current(1)
120.399 :   82175 app connect changed:last(1) != current(0)
165.579 :   84434 [L-FLYMODE][Ctrl<11>] REQ_BATTERY AUTO_LANDING_HOLD ctrl_auto_landing
170.379 :   84674 app connect changed:last(0) != current(1)
170.839 :   84697 app connect changed:last(1) != current(0)
171.339 :   84722 app connect changed:last(0) != current(1)
171.579 :   84734 [L-FLYMODE]CTRL reset all by cancel battery auto landing
171.599 :   84735 [L-FLYMODE][Ctrl<1>] REQ_RC_NORMAL ATTI_HOLD ctrl_gps_atti
171.799 :   84745 app connect changed:last(1) != current(0)
172.299 :   84770 app connect changed:last(0) != current(1)
172.759 :   84793 app connect changed:last(1) != current(0)
175.759 :   84943 [L-FLYMODE][Ctrl<8>] REQ_RC_LOST NAVI_GO_HOME ctrl_navi_go_home
182.959 :   85303 [L-FLYMODE][Ctrl<11>] REQ_BATTERY AUTO_LANDING_HOLD ctrl_auto_landing
194.279 :   85869 [L-FLYMODE]CTRL reset all by cancel battery auto landing
194.299 :   85870 [L-FLYMODE][Ctrl<8>] REQ_RC_LOST NAVI_GO_HOME ctrl_navi_go_home
204.399 :   86375 [L-FLYMODE][Ctrl<11>] REQ_BATTERY AUTO_LANDING_HOLD ctrl_auto_landing
234.439 :   87877 [L-FLYMODE]CTRL reset all by cancel battery auto landing
234.459 :   87878 [L-FLYMODE][Ctrl<8>] REQ_RC_LOST NAVI_GO_HOME ctrl_navi_go_home
244.579 :   88384 [L-FLYMODE][Ctrl<11>] REQ_BATTERY AUTO_LANDING_HOLD ctrl_auto_landing
268.439 :   89577 app connect changed:last(0) != current(1)
269.479 :   89629 [L-FMU/LED]action changed. battery error!:battery_status_data.smart_capacity_level2_st
275.203 :   89915 Eeprom write offset:8f8||
275.703 :   89940 Eeprom write offset:8f8||
281.263 :   90218 Eeprom write offset:8f8||
289.063 :   90608 Eeprom write offset:8f8||
289.943 :   90652 Eeprom write offset:8f8||
290.543 :   90682 Eeprom write offset:8f8||
292.043 :   90757 Eeprom write offset:8f8||
312.319 :   91771 [L-FLYMODE]CTRL reset all by cancel battery auto landing
312.339 :   91772 [L-FLYMODE][Ctrl<1>] REQ_RC_NORMAL ATTI_HOLD ctrl_gps_atti
312.479 :   91779 [L-FMU/LED]action changed. battery warning!:battery_status_data.capacity_level1_status
317.599 :   92035 [L-FLYMODE][Ctrl<11>] REQ_BATTERY AUTO_LANDING_HOLD ctrl_auto_landing
317.879 :   92049 [L-FMU/LED]action changed. battery error!:battery_status_data.smart_capacity_level2_st
342.079 :   93259 [L-FMU/LED]action changed. battery error!:battery_status_data.capacity_level2_status(3
366.098 :   94460 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , conformity
366.298 :   94470 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, conformity
366.498 :   94480 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , conformity
366.698 :   94490 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, conformity
367.498 :   94530 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , conformity
367.898 :   94550 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, conformity
368.298 :   94570 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , conformity
368.698 :   94590 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, conformity
370.298 :   94670 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , conformity
370.698 :   94690 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, conformity
374.617 :   94885 [L-FMU/FSM]near ground
374.918 :   94901 [L-GPS](0)Lost. Reason:compass yaw err large
375.518 :   94931 [L-GPS](0)Lost. Reason:gps disable
375.698 :   94940 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , conformity
375.898 :   94950 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, conformity
376.098 :   94960 [L-FDI][FDI][NS(0)][GPS(0)]: fault on , conformity
376.898 :   95000 [L-GPS](0)Lost. Reason:compass yaw err large
376.898 :   95000 [L-FDI][FDI][NS(0)][GPS(0)]: fault off, conformity
377.098 :   95010 [L-GPS](0)Lost. Reason:gps disable
377.279 :   95019 [L-FDI][FDI][CTRL]: fault on , tilt_ctrl_fail
377.299 :   95020 [L-FDI][FDI][CTRL]: fault off, tilt_ctrl_fail
377.318 :   95021 [L-FDI][FDI][NS(0)][COMPASS(1)]: fault on , over_large
377.338 :   95022 [L-FDI][FDI][NS(0)][COMPASS(1)]: fault off, over_large
377.339 :   95022 [L-FDI][FDI][CTRL]: fault on , tilt_ctrl_fail
377.398 :   95025 [L-FDI][FDI][NS(0)][COMPASS(1)]: fault on , over_large
377.399 :   95025 [L-FDI][FDI][CTRL]: fault off, tilt_ctrl_fail
377.419 :   95026 [L-FDI][FDI][CTRL]: fault on , tilt_ctrl_fail
377.438 :   95027 [L-FDI][FDI][NS(0)][COMPASS(1)]: fault off, over_large
377.439 :   95027 [L-FDI][FDI][CTRL]: fault off, tilt_ctrl_fail
377.458 :   95028 [L-FDI][FDI][NS(0)][COMPASS(1)]: fault on , over_large
377.478 :   95029 [L-FDI][FDI][NS(0)][COMPASS(1)]: fault off, over_large
377.518 :   95031 [L-GPS](0)Lost. Reason:compass yaw err large
377.519 :   95031 [L-FDI][FDI][CTRL]: fault on , tilt_ctrl_fail
377.538 :   95032 [L-FDI][FDI][NS(0)][COMPASS(1)]: fault on , over_large
377.539 :   95032 [L-FDI][FDI][NS(0)][FUSION(0)]: fault on , magn_heading_err_large
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Ronny123
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  9#
After looking at the recording i see that i did a 360 rotation just before everything went sour.

I'll get in touch with support once it opens again.

Drone is fine, but propeller mouting got damaged so its grounded till i get replacement.

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Geebax
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  10#
Ronny123 Posted at 3-12 14:39
After looking at the recording i see that i did a 360 rotation just before everything went sour.

I'll get in touch with support once it opens again.

When we say post your log, we mean to this web site: https://www.phantomhelp.com/LogViewer/Upload/
Follow the upload instructions on the site and come back here and post a link to the results. However in the bit you published I see a number of errors point to a large compass yaw error, they are most usually caused by starting the aircraft and taking off from a magnetically dirty location.

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Ronny123
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  11#
Im not able to upload logs to phantomhelp, it says it doesnt accept .DAT files, which is what the phantom 4 gives me.
I tried DatCon and then upload the exported .csv file, but i get an 500 error when i try to upload the file.
I uploaded the .DAT files here:

https://gofile.io/?c=bRRWup

Also here is a screenshot from the viewer:
https://imgur.com/a0EwLEp

It actually do report lots of satelite connections, so im obviously confused, so any help understanding this is really appreciated.
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JJB*
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  12#
Ronny123 Posted at 3-12 23:47
Im not able to upload logs to phantomhelp, it says it doesnt accept .DAT files, which is what the phantom 4 gives me.
I tried DatCon and then upload the exported .csv file, but i get an 500 error when i try to upload the file.
I uploaded the .DAT files here:

Hi Ronny,

The flightlog is on your mobile device; subfolder of DJI go app.

cheers
JJB
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