Mavic pro lost connection and never came back

[mryeje]

I was flying a way point mission via Drone Harmony and the Mavic was 70% finished and flying over a forest when the app changed out of an "active mission state" (just what im calling it) to the planning section. The controller said that it was trying to reconnect. I pushed RTH and stood there for a long 10 mins, it never came back. The people at DH gave me instructions on where to find the GPS coordinates from the last way point. Some friends and i are going to look for it tonight after work.

There was 60 percent battery life left, no errors, no wind, and 45m up with no obstacles ; is it possible this was a defect? I didnt get the insurance so I suppose I'm SOL.

 

[Cyberpower678]

Please upload you flight log to https://www.phantomhelp.com/LogViewer/Upload/

 

[Skrems]

Sorry to hear this and good luck looking for it.

Do you set RTH with Go4 then switch to Drone Harmony? I am wondering if the DJI find my drone would still have last GPS info?

Had you had any previous successful flights with DH? It’s still beta right?

 

[mryeje]

Please upload you flight log to https://www.phantomhelp.com/LogViewer/Upload/

I tried but it doesnt seem to like DH log files. I did manually find the gps coords with DH's help
Google Maps

 

[mryeje]

Sorry to hear this and good luck looking for it.

Do you set RTH with Go4 then switch to Drone Harmony? I am wondering if the DJI find my drone would still have last GPS info?

Had you had any previous successful flights with DH? It’s still beta right?

Its supposed to still use the RTH features from Go4

 

[Cyberpower678]

I tried but it doesnt seem to like DH log files. I did manually find the gps coords with DH's help
Google Maps

Its supposed to still use the RTH features from Go4

This is why a rarely recommend 3rd Party apps beyond what's already supported and can be processed.

 

[msinger]

I'm not familiar with DH logs, but I'll check it out to see if it contains anything useful if you upload it here (or post a download link if you're not able to upload it here).

 

[mryeje]

This is why a rarely recommend 3rd Party apps beyond what's already supported and can be processed.

I don't think it had anything to do with the software. It lost connection with the controller, that's at the hardware level. It didn't crash, it just disconnected and I couldn't use the remote with it at all and it either flew away or shut down. I think it's completely DJI s responsibility.

 

[Cyberpower678]

I don't think it had anything to do with the software. It lost connection with the controller, that's at the hardware level. It didn't crash, it just disconnected and I couldn't use the remote with it at all and it either flew away or shut down. I think it's completely DJI s responsibility.

That's not what I meant. We don't have a usable flight log to analyze now, and DJI will not claim responsibility if it can't even look at a flight log of the problematic flight. Without being able to demonstrate a malfunction, your SOL.

 

[mryeje]

That's not what I meant. We don't have a usable flight log to analyze now, and DJI will not claim responsibility if it can't even look at a flight log of the problematic flight. Without being able to demonstrate a malfunction, your SOL.

There is a flight log, it's just a different format than the DJI one. I found it in the DJI SDK folder.

 

[Cyberpower678]

There is a flight log, it's just a different format than the DJI one. I found it in the DJI SDK folder.

I doubt it will be useful to the DJI analysts though.

 

[deggers]

Mental note to self ; stay away from drone harmony--- sorry to hear about your loss

 

[mryeje]

Mental note to self ; stay away from drone harmony--- sorry to hear about your loss

I don't think it was the softwares fault, I think it was the hardware's fault, I switched to atti mode and sport mode, tried rth on the controller which overrides drone Harmonys app. The black box from the controller produced file named fatal.log which also leads me to believe there was a defects or malfunction.

 

[mryeje]

Looking for a drone in the forest is misery
here is a link to my footsteps mapped -->Drone search
gopro footage of the search party -->

To view this content we will need your consent to set third party cookies.
For more detailed information, see our cookies page.

Accept third party cookies

 

[mryeje]

In normal circumstances the RTH will be initiated when RC signal is lost unless settings are set to hover in app?

I believe so,I know it asks you to pick either for the end of the mission.

 

[peros550]

Sorry for your loss. Assuming your Mavic was set to RTH in case of signal loss, and RTH didn't complete then you should try think what was the RTH altitude and if there were any obstacles in the area in that altitude. Furthermore, if the Mavic had Obstacle Avoidance enabled, and on its way back the sun would be in front of it that could be an issue as the sun very often is falsely picked up by the front cameras as an object and interrupts the RTH procedure causing an emergency landing a few minutes later when the battery runs out.

 

[msinger]

I doubt it will be useful to the DJI analysts though.

No worries. The OP just wants to find his Mavic at this point.

There is a flight log, it's just a different format than the DJI one.

Does DH create a log file like DJI GO, Litchi, and other 3rd party apps usually do?

 

[guest112]

I believe so,I know it asks you to pick either for the end of the mission.

Hi mryeje,

For clarification, there are three things to consider in your discussions:

1. When your RC loses contact, nothing you do on your RC will change the drones behavior. E.g. switching to sports mode, pressing the RTH button etc. will not work, since the RC lost connection.
2. When you have connection to the drone, the RTH button works with the Drone Harmony planner.
3. For video missions the drone will continue to follow the waypoint mission even when RC signal is lost (more on this in our FAQ).

We will provide additional options in the feature for dealing with RC signal loss:

• Hover
• RTH
• Auto Land at signal loss location
• Go to first waypoint (backtracking along mission)
• Continue mission (following mission)

Does DH create a log file like DJI GO, Litchi, and other 3rd party apps usually do?

We added a csv export for flight logs and it will be available with the next update. Furthermore we'll look into making it compatible with https://www.phantomhelp.com/LogViewer/Upload/.

Best regards,
DH Team

 

[mryeje]

Hi mryeje,

For clarification, there are three things to consider in your discussions:

1. When your RC loses contact, nothing you do on your RC will change the drones behavior. E.g. switching to sports mode, pressing the RTH button etc. will not work, since the RC lost connection.
2. When you have connection to the drone, the RTH button works with the Drone Harmony planner.
3. For video missions the drone will continue to follow the waypoint mission even when RC signal is lost (more on this in our FAQ).

We will provide additional options in the feature for dealing with RC signal loss:

• Hover
• RTH
• Auto Land at signal loss location
• Go to first waypoint (backtracking along mission)
• Continue mission (following mission)

We added a csv export for flight logs and it will be available with the next update. Furthermore we'll look into making it compatible with https://www.phantomhelp.com/LogViewer/Upload/.

Best regards,
DH Team

The RC did lose connection, I dont think the drone tried to continue the mission because the mission ends at my house and the drone was 70% finished is mission with 68% of the battery left. I sincerely think something failed with its hardware. I was about 900m from me 45m up, 68% battery. No reason it wouldnt reconnect. I've had it lose connection before many times but this was clearly different. I've flown other Drone Harmony missions close to 2km away and lost connection but it was intermittent and the connection always came back within 10-15 seconds. There was no intermittent video feed, no sign of life whatsoever. I think the battery malfunctioned or the drone itself.

 

[RavenTBK]

I don't think it was the softwares fault, I think it was the hardware's fault, I switched to atti mode and sport mode, tried rth on the controller which overrides drone Harmonys app. The black box from the controller produced file named fatal.log which also leads me to believe there was a defects or malfunction.

Switched to atti mode? Yeah, you know it doesn't work that way, right?

Pilot error.