DJI Mini 2 Will Not Return Home after mission completed.
I have tried a mission plan and set it to return home at the end of the mission but it just hangs in the air in the position completed. Anybody any ideas why?
I was looking forward to using the app but I am now worried to do so.
Thanks,
Comments
11 comments
Are you closer than 20m?
https://support.dronelink.com/hc/en-us/community/posts/360049192474-Did-not-the-RTH-every-time-just-landed-at-end-of-mission-and-when-RTH-pressed
I trust your knowledge Jim and I’ve read about this before. However, I’m fairly sure when I’ve flown missions which about 75% are from my driveway it always performed RTH. I’ll try again with one of missions which I flew a path back to my location within about 10 to 20 feet and see what it does. It has never just landed after any mission when close and has performed an RTH if I set it to that.
That video link I sent in that one post where I performed the low altitude AGL on my driveway was measured in Google Maps from my take-off location to where it ended up at end of path and it is about 20 feet away. Too windy today to fly but when I get a chance in next couple days I’ll try a plan which I send it back on a path to my location within about 15 feet or so. I’ll let you know what it does. Very curious.
Mike, I have tried the RTH at less than 65 feet or 20m and yes indeed it will just land where you initiate the RTH. Whether it is initiated by hand or program it will land right there.
Change of subject, did you get a "Fly Report" for 2021 from DJI. I got one a couple days ago and it said I had more flight time for the mini than 97.6 % of people flying the mini in the world. I guess I lost a few hours from being grounded waiting for my new drone.
Hi Bob. I checked the MA2 manual and found the section about Smart RTH within close distance from home-point. I knew about the less then and greater then 50m distance. I didn’t remember about the less then 5m distance state.
This 5m (16’) would make sense since I’ve flown a path back to my driveway many, many times at a distance of about 25 to 40 feet from home-point. I’ve never had it just land. It has always performed an RTH. I don’t know why DJI is reporting the 20m but seems incorrect. Very curious.
Hope the new drone is working well. Waiting to hear how everything is working.
So far, but the weather here is not conducive to flying. 10 degrees with 30 mph winds
Hello all,
I'd like to get a bit more clarification on this "RTH at the end of the mission" thing...
When I run a preview of the mission, with RTH set, the drone does appear to fly back to the start point. The simulation simply resets and restarts. I can also confirm that the end point of the mission is around 200 meters from the start point.
So, I have a couple of questions:
I'll be flying missions over a large lake so I to clearly understand what will happen at the end of the mission.
Thanks in advance for your help.
Rob Donald
I am a little rusty at flying since my drone has been in the hands of DJI, for repair, for almost 2 months. Assuming you have set your RTH with DJI Fly, it does this automatically ever time you take off, you can change it manually through the app. But if you have set the RTH the Dronelink software will use what you set as it's command. I do not believe the RTH applies to the Simulation, Jim could better answer that. If you put RTH in the Dronelink program it will return to your designated RTH. But, DJI has had problems with the RTH feature. When I was flying, I flew a mission too far, out of range of the remote and I lost contact with the drone. The program is supposed to make the drone hover until the connection is good again or if no connection for 11 seconds DJI program is supposed to initiate RTH and the drone will go to your designated height or remain at your actual height if higher than your designated height. My drone was out of contact for 35 seconds and did not return home. I assume that at this point RTH would initiate when the battery dropped too low. The DJI program is supposed to calculate amount of battery too distance to make sure enough power to RTH. I did not wait that long I got in my truck and drove to where the drone was hovering and I regained control. I reported this issue to DJI and the next month they came out with an update addressing RTH issues, so maybe it's fixed.
Keep in mind that the Dronelink command to RTH when mission is complete is just what it says. I believe I am right when I say that the mission has to complete for RTH to activate. This has been my experience many times. I was flying a mission and the drone went off course because of wind, and then just hovered. I would re-start the mission and the drone would fly back to the point where it went off course and continue the mission. If these conditions continued to the point that the battery was too low then DJI RTH should initiate. But what if you fly out of range, as I did, and the DJI RTH does not work, and your drone is over water? Do you have a boat nearby? At this point you will have to pray that the low battery would initiate RTH but I am not sure that will happen if you are out of range. I might experiment with that before actually doing it. Even then there is no guarantee that if it worked once that it will work again. I have experienced strange things with my drone that not even DJI can explain, like the drone making an emergency landing with 92% battery. It should not happen but did and I could not re-create it and DJI, who checked the flight records, could not explain how it happened. They sent me a new drone because of it, but if it is a software bug a new drone would not make a difference.
Unexpected landings with a 92% battery???
Now I'm scared!
Seriously, thanks for taking the time to respond to my questions. From what you are saying, it sounds like the simulation does not show the RTH, but it does execute the RTH in the field (barring any of the weird issues you faced).
I plan to exhaustively field test the DJI hardware and the Dronelink software in... well... a field before taking it over the water. I need to be as confident as I can be before starting marine operations.
I will also be launching and retrieving from a boat, partly due to limiting the transmission distance and partly to being close should something happen. I don't expect to be more than a couple of hundred meters from the craft during these flight operations. I'll have to see if I can fit something on the body to at least stop it from sinking should the catastrophic happen.
I'll wait for Jim to confirm that the simulation simply does not show the RTH feature... or I'll verify when I'm able to get the drone out for a test flight... once it stops snowing.
Cheers and thanks.
Rob
I didn't see the model of your drone mentioned, but there are floats available for some, like the Mini 2 anyway. Not sure about larger drones though.
https://support.dronelink.com/hc/en-us/community/posts/360049958174-In-the-debug-mode-
As George said there are drone recovery floats available. Note: Recovery, but the drone will be ruined most likely. There is a process called "pickling " used in recovering submerged outboards, but I don't know if it would work with a drone. As far as the distance the drone can fly without loosing contact, I usually get about 1800 feet maximum. That can change with location.
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