How to handle `RTK_SERVER_NOT_REACHABLE`

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Alexis Glass

When I call `INetworkRTKManager#startNetworkRTKService`, sometimes - and I'm not clear why - the completion callback is called with the error `RTK_SERVER_NOT_REACHABLE`. I do not see any particular reason why `startNetworkRTKService` succeeds in some cases and fails in others. However, once I receive this error it doesn't appear to matter what is done next - nothing short of relaunching the application allows a successful `startNetworkRTKService` call to be made. Often the error occurs after a single successful pair of calls to `startNetworkRTKService` / `stopNetworkRTKService`, but sometimes it is possible to connect and disconnect several times before the error occurs.

Do you have any guidance on how to handle the RTK_SERVER_NOT_REACHABLE error?


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  • DJI Developer Support
    RTK_SERVER_NOT_REACHABLE means your RC has no internet connection. If you connect your RC via a hotspot, this might be the case. The hotspot connection is unstable.
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  • Alexis Glass

    Given that I can reliably (I would say at least 90% of the time) successfully start the RTK service by closing and restarting the app, I do not feel that the instability of the hotspot is an adequate explanation for why the SDK, at some point, always returns `RTK_SERVER_NOT_REACHABLE` when stopping and restarting the RTK service.

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  • DJI Developer Support
    The error code is thrown by the firmware so I cannot give tell you why is this happens. It just simply means the connection cannot be built because the network server link connection cannot be built. Retry or reboot the aircraft may help.
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