Why didn't my controller re-connect (WayPoint Mission)

Joined
Apr 4, 2017
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Location
Barrie, ON Canada
#1
Yesterday, I was running a Waypoint mission using Hammer Missions. For Waypoints, it works a lot like Litchi, it loads the mission to the drone and will continue the mission if signal is lost, and yesterday that is exactly what happened. The AC lost connection to the controller about 3/4 the way through on the return portion and never regained connection even as it came closer and auto landed at the home point. My question is, why did it not regain connection even when the AC was close by? Would shutting off the controller and restarting it have helped regain connection?

At the point of disconnection, there was a message on my screen indicating that the AC had disconnected from the controller and the controller light turned from green to red. The AC continued the mission uninterrupted and auto landed as programmed at the home point. Usually after the last waypoint has been reached, I resume manual control and either fly around a bit more or land (hand catch).

The AC was always in sight the whole mission and when it lost contact I had sight of it, so could tell that it was finishing the mission.

Where I was flying there was some interference from local WiFi networks, but I have flown in this location numerous times and everything was fine.

I looked over the flight log but can't see anything that would lead me to the cause of the disconnect. Here's the link to it in case someone else has a better idea.

DJI Flight Log Viewer - PhantomHelp.com

Please note that the Google map shows summer but there is lots of ice on the bay and I took off from the ice (not from a boat).

Chris
 
Joined
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Watkinsville, Georgia
#2
My question is, why did it not regain connection even when the AC was close by?
You won't know from this file, and maybe not even from the aircraft data.
 
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Barrie, ON Canada
#3
You won't know from this file, and maybe not even from the aircraft data.
Thanks for your reply.

I do have the AC DAT file and was looking at the Event Log file in DatCon and there is a line that reads:

194.318 : 15075 [LED] changed: rc completely lost

I'm assuming that is when the signal was lost but I can't see if there was any cause to it.

Here is the link to the DAT file on my Google Drive.

FLY448.DAT

Chris
 
Joined
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Watkinsville, Georgia
#4
194.318 : 15075 [LED] changed: rc completely lost
This is only one of several during the flight. There is no signal loss during the RTH portion. Only at the very end of the flight and the aircraft was already on the ground at that point. There is really no way to determine a cause for the brief disconnects, other than possibly antenna orientation. You can see the disconnects below and these are also in the event log.

Capture2.png
 
Joined
Apr 4, 2017
Messages
411
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Location
Barrie, ON Canada
#5
This is only one of several during the flight. There is no signal loss during the RTH portion. Only at the very end of the flight and the aircraft was already on the ground at that point. There is really no way to determine a cause for the brief disconnects, other than possibly antenna orientation. You can see the disconnects below and these are also in the event log.

View attachment 109402
Thanks for your reply.

My antenna was in the upright position (90 degrees) and pointing at the AC like I always have it. The only thing I can think of is there was more WiFi interference at the time than there usually is. I fly frequently at this location, but usually in the morning or early afternoon. On that particular flight it was early evening and I was trying to capture a sunset.

After swapping batteries, I took off again and took this pano (manually) in Litchi.

Chris
BF9FD07C-CBFB-4A81-991D-7C07EEA48DC0.jpeg
 

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