Fell out the sky. Flight record help.

sar104 · Apr 28, 2018

SamRaju said:
Is there an easy way of getting the video up or would I need to upload to YouTube and share the link? Also how do I go about getting the DAT. I have no idea what that is.

How to retrieve a V3.DAT from the tablet

SamRaju · Apr 28, 2018

Ok guys here's the video footage. It's not very long at all.

I'm not able to upload the DAT file here. How do I go about doing it? I have the file on my desktop.

sar104 · Apr 28, 2018

SamRaju said:
Ok guys here's the video footage. It's not very long at all.

I'm not able to upload the DAT file here. How do I go about doing it? I have the file on my desktop.

Upload the DAT file to Dropbox or similar, and then post the shared link.

From the video it appears just to have been the typical slight loss of height associated with a very sudden stop. It's not advisable to attempt those kinds of maneuvers that close to the ground. The attitude/altitude holding is quite impressive on these aircraft, but that's just asking too much.

SamRaju · Apr 28, 2018

sar104 said:
Upload the DAT file to Dropbox or similar, and then post the shared link.

From the video it appears just to have been the typical slight loss of height associated with a very sudden stop. It's not advisable to attempt those kinds of maneuvers that close to the ground. The attitude/altitude holding is quite impressive on these aircraft, but that's just asking too much.

Ok i'll do that.

Yeah it was probably something stupid I did. I just want to make sure it was my fault and not a problem with the drone. Just worried about taking it high to do some filming and it decides to cut out again.

SamRaju · Apr 28, 2018

Here's the link for the DAT file. Not too sure if I've done it right as I've never used dropbox before. Hopefully it's the right file as well. I also have another one but I think it's this one.

Dropbox - 2018-04-26 18_57_34-0K1DEBT00C0430.dat

MavicCF · Apr 28, 2018

DatCon isn't wanting to read that DAT. Is it working for you @sar104?

sar104 · Apr 28, 2018

MavicCF said:
DatCon isn't wanting to read that DAT. Is it working for you @sar104?

That's not the right kind of DAT file.

@SamRaju - I don't think you followed the instructions precisely enough. Wrong directory.

MavicCF · Apr 28, 2018

sar104 said:
That's not the right kind of DAT file.

@SamRaju - I don't think you followed the instructions precisely enough. Wrong directory.

That's what I figured...

SamRaju · Apr 28, 2018

sar104 said:
That's not the right kind of DAT file.

@SamRaju - I don't think you followed the instructions precisely enough. Wrong directory.

Sorry, didn't realise there was another folder there. This should be it.

Dropbox - 2018-04-26_18-56-54_FLY028.DAT

sar104 · Apr 28, 2018

SamRaju said:
Sorry, didn't realise there was another folder there. This should be it.

Dropbox - 2018-04-26_18-56-54_FLY028.DAT

That's the one. It was just a slight drop due to the rapid stop. If you look at the motor speed data you can see the high speeds of the two rear motors during fast forwards flight, followed by the decrease when you commanded the stop. It only lost a meter or two of height, but that was enough to hit the ground. The log entries below tell the rest of the story.

253.761 : 17904 [L-FMU/FSM]state changed. cur: in air
253.764 : 17905 [L-HOME]Update. lati:52.5854350 longti:-1.9639177 alti:129.48
255.113 : 17984 [L-FMU/LED]action changed. set home

0)
255.841 : 18026 [L-N_MIS]req abort all for reach target height
255.845 : 18026 [L-TAKEOFF]exit auto takeoff plan!
255.850 : 18027 [L-N_MIS]Switch new mis 3 req 2 from mis 26 req 16
255.850 : 18027 [L-FLYMODE]SWITCH2HOVER!
256.905 : 18089 [L-FMU/LED]action changed. Normal Flash(0)
256.905 : 18089 [L-FMU/LED]type:0, normal flash action:
256.905 : 18089 [L-FMU/LED]c0:0,1;c1:0,3;c2:0,1;c3:2,3;c4:0,3;c5:0,3;c6:0,1;c7:0,3
258.030 : 18154 [L-NS][AHRS],qg obv buffer size[218/270]
258.030 : 18154 [L-NS][AHRS],pva obv buffer size[238/270]
258.697 : 18194 [L-FDI][sensor_api_info] head(2,0,31,4).|
263.287 : 18463 [L-FDI]NS(0) COMPASS(0): fault on , noise
263.305 : 18464 [L-FMU/MOTOR]mag_need_action: restart drone
263.322 : 18465 [L-FDI]NS(0) COMPASS(0): fault off, noise
264.521 : 18535 [L-FMU/FSM]not near ground
264.534 : 18536 [L-FMU/MOTOR]safe_near_grd:false
267.478 : 18708 [L-FMU/FSM]near ground
267.657 : 18719 [L-FDI][CTRL]: fault on , impact_in_air
267.674 : 18720 [L-RC]craft ctrl failed!!!
267.674 : 18720 [L-FDI][CTRL]: fault off, impact_in_air
267.776 : 18726 [L-FDI][CTRL]: fault on , tilt_ctrl_fail
267.947 : 18736 [L-FDI][CTRL]: fault on , impact_in_air
267.981 : 18738 [L-FDI][CTRL]: fault off, impact_in_air
268.199 : 18750 [L-FMU/FSM]not near ground
268.430 : 18764 [L-FDI][FDI] ns atti(0) vgz is outlier
268.430 : 18764 [L-FDI][FDI] ns atti(1) vgz is outlier
268.442 : 18765 [L-FDI]NS(0) FUSION(0): fault on , disagree
268.442 : 18765 [L-FDI]NS(0) FUSION(1): fault on , disagree
268.442 : 18765 [L-FDI]fatal error: no ns with level < 4 !!!
268.510 : 18769 [L-FMU/MOTOR]fault on , esc(2) is stall
268.527 : 18770 [L-FDI]NS(0) FUSION(0): fault off, disagree
268.527 : 18770 [L-FDI]NS(0) FUSION(1): fault off, disagree
268.528 : 18770 [L-FDI][FDI] ns atti(0) vgz is outlier
268.528 : 18770 [L-FDI][FDI] ns atti(1) vgz is outlier
268.544 : 18771 [L-FDI]NS(0) FUSION(0): fault on , disagree
268.544 : 18771 [L-FDI]NS(0) FUSION(1): fault on , disagree
268.544 : 18771 [L-FDI]fatal error: no ns with level < 4 !!!
268.561 : 18772 [L-FDI]NS(0) FUSION(0): fault off, disagree
268.561 : 18772 [L-FDI]NS(0) FUSION(1): fault off, disagree
268.766 : 18784 [L-FMU/MOTOR]fault on , esc(1) is stall
268.800 : 18786 [L-FMU/MOTOR]fault on , esc(3) is stall
268.817 : 18787 [L-FMU/MOTOR]fault on , esc(4) is stall
269.397 : 18821 [L-RC]craft ctrl failed!!!
271.121 : 18922 [L-RC]craft ctrl failed!!!
271.360 : 18936 [L-FMU/MOTOR]tilt over (65.0) for (4.0) secs when motor is on
271.377 : 18937 [L-FMU/MOTOR] Stop. reason:roll over or atti fail
271.377 : 18937 [L-FMU/MOTOR]Total start times: 2, time: 300.32
271.377 : 18937 [L-PWM]set actuator mode:IDLE
271.377 : 18937 [L-N_MIS]req abort all for motor stopped
271.377 : 18937 [L-FDI][CTRL]: fault off, tilt_ctrl_fail
271.378 : 18937 [L-FMU/FSM]state changed. cur: motor off
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(1) is stall
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(2) is stall
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(3) is stall
271.394 : 18938 [L-GEO][sa_drone_storage_process][0]write flash @ 381663|
271.397 : 18938 [L-N_MIS]Switch new mis 3 req 2 from mis 26 req 16
271.397 : 18938 [L-FLYMODE]SWITCH2HOVER!
271.411 : 18939 [L-FMU/MOTOR]fault off, esc(4) is stall

SamRaju · Apr 28, 2018

sar104 said:
That's the one. It was just a slight drop due to the rapid stop. If you look at the motor speed data you can see the high speeds of the two rear motors during fast forwards flight, followed by the decrease when you commanded the stop. It only lost a meter or two of height, but that was enough to hit the ground. The log entries below tell the rest of the story.

View attachment 36755

253.761 : 17904 [L-FMU/FSM]state changed. cur: in air
253.764 : 17905 [L-HOME]Update. lati:52.5854350 longti:-1.9639177 alti:129.48
255.113 : 17984 [L-FMU/LED]action changed. set home0)
255.841 : 18026 [L-N_MIS]req abort all for reach target height
255.845 : 18026 [L-TAKEOFF]exit auto takeoff plan!
255.850 : 18027 [L-N_MIS]Switch new mis 3 req 2 from mis 26 req 16
255.850 : 18027 [L-FLYMODE]SWITCH2HOVER!
256.905 : 18089 [L-FMU/LED]action changed. Normal Flash(0)
256.905 : 18089 [L-FMU/LED]type:0, normal flash action:
256.905 : 18089 [L-FMU/LED]c0:0,1;c1:0,3;c2:0,1;c3:2,3;c4:0,3;c5:0,3;c6:0,1;c7:0,3
258.030 : 18154 [L-NS][AHRS],qg obv buffer size[218/270]
258.030 : 18154 [L-NS][AHRS],pva obv buffer size[238/270]
258.697 : 18194 [L-FDI][sensor_api_info] head(2,0,31,4).|
263.287 : 18463 [L-FDI]NS(0) COMPASS(0): fault on , noise
263.305 : 18464 [L-FMU/MOTOR]mag_need_action: restart drone
263.322 : 18465 [L-FDI]NS(0) COMPASS(0): fault off, noise
264.521 : 18535 [L-FMU/FSM]not near ground
264.534 : 18536 [L-FMU/MOTOR]safe_near_grd:false
267.478 : 18708 [L-FMU/FSM]near ground
267.657 : 18719 [L-FDI][CTRL]: fault on , impact_in_air
267.674 : 18720 [L-RC]craft ctrl failed!!!
267.674 : 18720 [L-FDI][CTRL]: fault off, impact_in_air
267.776 : 18726 [L-FDI][CTRL]: fault on , tilt_ctrl_fail
267.947 : 18736 [L-FDI][CTRL]: fault on , impact_in_air
267.981 : 18738 [L-FDI][CTRL]: fault off, impact_in_air
268.199 : 18750 [L-FMU/FSM]not near ground
268.430 : 18764 [L-FDI][FDI] ns atti(0) vgz is outlier
268.430 : 18764 [L-FDI][FDI] ns atti(1) vgz is outlier
268.442 : 18765 [L-FDI]NS(0) FUSION(0): fault on , disagree
268.442 : 18765 [L-FDI]NS(0) FUSION(1): fault on , disagree
268.442 : 18765 [L-FDI]fatal error: no ns with level < 4 !!!
268.510 : 18769 [L-FMU/MOTOR]fault on , esc(2) is stall
268.527 : 18770 [L-FDI]NS(0) FUSION(0): fault off, disagree
268.527 : 18770 [L-FDI]NS(0) FUSION(1): fault off, disagree
268.528 : 18770 [L-FDI][FDI] ns atti(0) vgz is outlier
268.528 : 18770 [L-FDI][FDI] ns atti(1) vgz is outlier
268.544 : 18771 [L-FDI]NS(0) FUSION(0): fault on , disagree
268.544 : 18771 [L-FDI]NS(0) FUSION(1): fault on , disagree
268.544 : 18771 [L-FDI]fatal error: no ns with level < 4 !!!
268.561 : 18772 [L-FDI]NS(0) FUSION(0): fault off, disagree
268.561 : 18772 [L-FDI]NS(0) FUSION(1): fault off, disagree
268.766 : 18784 [L-FMU/MOTOR]fault on , esc(1) is stall
268.800 : 18786 [L-FMU/MOTOR]fault on , esc(3) is stall
268.817 : 18787 [L-FMU/MOTOR]fault on , esc(4) is stall
269.397 : 18821 [L-RC]craft ctrl failed!!!
271.121 : 18922 [L-RC]craft ctrl failed!!!
271.360 : 18936 [L-FMU/MOTOR]tilt over (65.0) for (4.0) secs when motor is on
271.377 : 18937 [L-FMU/MOTOR] Stop. reason:roll over or atti fail
271.377 : 18937 [L-FMU/MOTOR]Total start times: 2, time: 300.32
271.377 : 18937 [L-PWM]set actuator mode:IDLE
271.377 : 18937 [L-N_MIS]req abort all for motor stopped
271.377 : 18937 [L-FDI][CTRL]: fault off, tilt_ctrl_fail
271.378 : 18937 [L-FMU/FSM]state changed. cur: motor off
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(1) is stall
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(2) is stall
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(3) is stall
271.394 : 18938 [L-GEO][sa_drone_storage_process][0]write flash @ 381663|
271.397 : 18938 [L-N_MIS]Switch new mis 3 req 2 from mis 26 req 16
271.397 : 18938 [L-FLYMODE]SWITCH2HOVER!
271.411 : 18939 [L-FMU/MOTOR]fault off, esc(4) is stall

Ah brilliant! So it was just because of the speed and the way I stopped. Nothing to worry about it randomly cutting out if flying at a slow steady speed?

sar104 · Apr 28, 2018

SamRaju said:
Ah brilliant! So it was just because of the speed and the way I stopped. Nothing to worry about it randomly cutting out if flying at a slow steady speed?

Correct. It didn't cut out - it just dropped a little due to the sudden stop. If it had been a meter or two higher it would have recovered just fine.

MavicCF · Apr 28, 2018

sar104 said:
That's the one. It was just a slight drop due to the rapid stop. If you look at the motor speed data you can see the high speeds of the two rear motors during fast forwards flight, followed by the decrease when you commanded the stop. It only lost a meter or two of height, but that was enough to hit the ground. The log entries below tell the rest of the story.

View attachment 36755

253.761 : 17904 [L-FMU/FSM]state changed. cur: in air
253.764 : 17905 [L-HOME]Update. lati:52.5854350 longti:-1.9639177 alti:129.48
255.113 : 17984 [L-FMU/LED]action changed. set home0)
255.841 : 18026 [L-N_MIS]req abort all for reach target height
255.845 : 18026 [L-TAKEOFF]exit auto takeoff plan!
255.850 : 18027 [L-N_MIS]Switch new mis 3 req 2 from mis 26 req 16
255.850 : 18027 [L-FLYMODE]SWITCH2HOVER!
256.905 : 18089 [L-FMU/LED]action changed. Normal Flash(0)
256.905 : 18089 [L-FMU/LED]type:0, normal flash action:
256.905 : 18089 [L-FMU/LED]c0:0,1;c1:0,3;c2:0,1;c3:2,3;c4:0,3;c5:0,3;c6:0,1;c7:0,3
258.030 : 18154 [L-NS][AHRS],qg obv buffer size[218/270]
258.030 : 18154 [L-NS][AHRS],pva obv buffer size[238/270]
258.697 : 18194 [L-FDI][sensor_api_info] head(2,0,31,4).|
263.287 : 18463 [L-FDI]NS(0) COMPASS(0): fault on , noise
263.305 : 18464 [L-FMU/MOTOR]mag_need_action: restart drone
263.322 : 18465 [L-FDI]NS(0) COMPASS(0): fault off, noise
264.521 : 18535 [L-FMU/FSM]not near ground
264.534 : 18536 [L-FMU/MOTOR]safe_near_grd:false
267.478 : 18708 [L-FMU/FSM]near ground
267.657 : 18719 [L-FDI][CTRL]: fault on , impact_in_air
267.674 : 18720 [L-RC]craft ctrl failed!!!
267.674 : 18720 [L-FDI][CTRL]: fault off, impact_in_air
267.776 : 18726 [L-FDI][CTRL]: fault on , tilt_ctrl_fail
267.947 : 18736 [L-FDI][CTRL]: fault on , impact_in_air
267.981 : 18738 [L-FDI][CTRL]: fault off, impact_in_air
268.199 : 18750 [L-FMU/FSM]not near ground
268.430 : 18764 [L-FDI][FDI] ns atti(0) vgz is outlier
268.430 : 18764 [L-FDI][FDI] ns atti(1) vgz is outlier
268.442 : 18765 [L-FDI]NS(0) FUSION(0): fault on , disagree
268.442 : 18765 [L-FDI]NS(0) FUSION(1): fault on , disagree
268.442 : 18765 [L-FDI]fatal error: no ns with level < 4 !!!
268.510 : 18769 [L-FMU/MOTOR]fault on , esc(2) is stall
268.527 : 18770 [L-FDI]NS(0) FUSION(0): fault off, disagree
268.527 : 18770 [L-FDI]NS(0) FUSION(1): fault off, disagree
268.528 : 18770 [L-FDI][FDI] ns atti(0) vgz is outlier
268.528 : 18770 [L-FDI][FDI] ns atti(1) vgz is outlier
268.544 : 18771 [L-FDI]NS(0) FUSION(0): fault on , disagree
268.544 : 18771 [L-FDI]NS(0) FUSION(1): fault on , disagree
268.544 : 18771 [L-FDI]fatal error: no ns with level < 4 !!!
268.561 : 18772 [L-FDI]NS(0) FUSION(0): fault off, disagree
268.561 : 18772 [L-FDI]NS(0) FUSION(1): fault off, disagree
268.766 : 18784 [L-FMU/MOTOR]fault on , esc(1) is stall
268.800 : 18786 [L-FMU/MOTOR]fault on , esc(3) is stall
268.817 : 18787 [L-FMU/MOTOR]fault on , esc(4) is stall
269.397 : 18821 [L-RC]craft ctrl failed!!!
271.121 : 18922 [L-RC]craft ctrl failed!!!
271.360 : 18936 [L-FMU/MOTOR]tilt over (65.0) for (4.0) secs when motor is on
271.377 : 18937 [L-FMU/MOTOR] Stop. reason:roll over or atti fail
271.377 : 18937 [L-FMU/MOTOR]Total start times: 2, time: 300.32
271.377 : 18937 [L-PWM]set actuator mode:IDLE
271.377 : 18937 [L-N_MIS]req abort all for motor stopped
271.377 : 18937 [L-FDI][CTRL]: fault off, tilt_ctrl_fail
271.378 : 18937 [L-FMU/FSM]state changed. cur: motor off
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(1) is stall
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(2) is stall
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(3) is stall
271.394 : 18938 [L-GEO][sa_drone_storage_process][0]write flash @ 381663|
271.397 : 18938 [L-N_MIS]Switch new mis 3 req 2 from mis 26 req 16
271.397 : 18938 [L-FLYMODE]SWITCH2HOVER!
271.411 : 18939 [L-FMU/MOTOR]fault off, esc(4) is stall

I love having the event log now, extremely useful!

SamRaju · Apr 28, 2018

sar104 said:
Correct. It didn't cut out - it just dropped a little due to the sudden stop. If it had been a meter or two higher it would have recovered just fine.

Excellent. Thanks for all the help guys! Great community here!