The signal strength of the Mavic mini?

vg1
 
967/5000
 
 
I did a few missions in the terrain mapping mode and I don't know what it depends on, but sometimes the mavic mini will complete the entire mission, sometimes half of the mission, and sometimes it stops even 5m away from the controller. Recently it stopped shortly after passing the first line from the net and it was not possible to continue the mission after reloading, because it stopped again after reaching the place where the mission was interrupted. I tried to fly along the net by hand, and by hand, I could complete the entire mission without any problems. Why is the drone disconnecting in automatic mode (even 5 m after taking off), and there is no problem when flying manually? The application is very good, but there is a problem in automatic mode, probably with the stability of the connection, which does not occur in manual mode, why? The distances are from 5m to 200m and the height is 50m. With the DJIFly application, I fly up to 1200m from the starting point.

Further questions:
- can the signal strength be switched from CE to FCC in the application?
- how to use the RTH application while it is being performed?
- do I have to start exactly from the place I chose when designing the mapping, or is it any in the mapping mission area?
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Comments

7 comments

Date Votes
  • Comment author
    Jim McAndrew Dronelink Staff

    There are several other threads on this already (for example, here and here to name a few).

    Not sure what you mean by how to use the RTH application. If you mean how to initiate RTH, just press the button on the RC and it will stop the mission.

    Takeoff location is only required if you specify a takeoff restriction in the plan settings. If you don't do that, you should be very cautious when taking off far away from the planned takeoff as all the altitudes depend on the drone takeoff location.

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  • Comment author
    vg1
    • Edited

    Thanks for the answer.

    BTW How to interrupt an automatically initiated RTH by DRONELINK?

    - can the signal strength be switched in europe from CE to FCC in the application DRONELINK? e.g. with FakeGPS? as in DJI Fly 1.0.8.

    - I read all the posts on the forum and I did not find an answer regarding why, when controlling manually, I have full signal range, and flying in the mapping mission mode, breaks the flight and interrupts the mapping mission? Is there any relationship between these two types of flight and link stability? Is there a parameter that determines the time or signal level after which the mission ends, is there any tolerance different in both types of flight?

    - where in the Dronelink application can I see during the mission what my current RTH height is?

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  • Comment author
    Jim McAndrew Dronelink Staff
    • RTH initiated by Dronelink is no different than any other RTH - just press the RTH button again to cancel it.
    • Dronelink doesn't support channel switching right now.
    • Disconnects are not related to the type of mission, and there is no tolerance parameter because a disconnection is an all or nothing type of event.
    • Dronelink does not display the RTH altitude right now, but you can just add a RTH altitude command to set it to anything you want at the start of your mission to be assured.
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  • Comment author
    vg1
    • Edited

    "Disconnects are not related to the type of mission, and there is no tolerance parameter because a disconnection is an all or nothing type of event."

    Thanks again.
    So the conclusion from this is that the interruption of missions is due to completely different reasons than loss of communication, because when flying and controlling manually everything works perfectly in the DroneLink application? Do I think right?

    This is where the problems may arise from:

    • - if I use only a ready-made standard mapping mission plan, without modification,
    • - there is no wind,
    • - low height (50m),
    • - short distance (50-300m),
    • - no transmission disruptions,
    • - a phone with an efficient processor,
    • - the simulation shows no errors?

    What else could be the reason for not fulfilling the conditions necessary to complete the mission, which I forgot? Or maybe they are errors in the SDK structure? What do you think?

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  • Comment author
    Jim McAndrew Dronelink Staff

    It is possible that the RC is still connected to the drone, but there is such a thing as uplink vs downlink and Dronelink needs both to remain connected without any interruptions, no matter how brief they may be. We have already made DJI aware of a potential issue in their SDK, but you should realize that the Mini uses wifi instead of the vastly superior OcuSync or Lightbridge connection tech that its larger siblings use. My guess is DJI will probably just point you to upgrading to a drone with better hardware / connection tech.

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  • Comment author
    vg1
    • Edited

    You are definitely right, but it is completely incomprehensible why I have very good RC-mini connectivity when flying handheld, and when using "SDK in Dronelink" I get irrational errors. This is not due to the type of WIFI signal transmission (because the distances are too small), but rather an underdeveloped SDK.
    I'll try the same missions with Air 1 and Mini again, see how it behaves.
    I also have Air 2, I wonder how DJI will prepare the SDK here.

     

    BTW If possible add an option as it is in PIX4DCapture where the missions are sent to the drone for the mapping mission.

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  • Comment author
    Jim McAndrew Dronelink Staff

    Onboard waypoints is on the roadmap:

    https://trello.com/c/qxHuS5lR/5-onboard-waypoints

    The problem is, the DJI SDK does not support them for the Mavic Mini, which is why so many people are turning to Dronelink:

    https://support.dronelink.com/hc/en-us/articles/360052533133-What-makes-Dronelink-different-or-better-than-other-apps-

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