Android Question Signal quality in DJI virtual strick example

derez · Jan 20, 2023

Continuing the discussions on Virtual Stick example https://www.b4x.com/android/forum/t...n-for-dji-mini-and-air-series.140089/#content
I asked ChatGPT how to get the signal quality from the drone, here is its answer:

B4X:

DJIFlightController flightController = djiAircraft.getFlightController();
flightController.getSignalQuality(new DJICommonCallbacks.DJICompletionCallbackWith<DJISignalQuality>() {
public void onSuccess(DJISignalQuality signalQuality) {
        int quality = signalQuality.getSignalQuality();
// use the quality variable as per your needs.
    }
public void onFailure(DJIError error) {
        // handle error
    }

});

Can someone help to put it in B4A code ? The flight controller is initialized in "AfterAircraftConnected" sub.

I asked again with request to put it in B4A code:

B4X:

Sub GetSignalQuality
    Dim flightController As DJIFlightController = djiAircraft.GetFlightController
    flightController.GetSignalQuality(SignalQualityCallback)
End Sub

Sub SignalQualityCallback(result As DJICommonCallbacks.DJICompletionCallbackWith(Of DJISignalQuality))
    If result.Success Then
        Dim signalQuality As DJISignalQuality = result.Value
        Log("Signal Quality: " & signalQuality.SignalQuality)
    Else
        Log("Error getting signal quality: " & result.Error.Description)
    End If
End Sub

This code uses the GetSignalQuality method to request the signal quality from the drone, and the SignalQualityCallback subroutine is called when the signal quality is received. The signal quality is returned as a value between 0 and 100, and it is logged to the console. If there is an error getting the signal quality, the error message is also logged to the console.

Please note that the SDK's method djiAircraft.getFlightController() returns a DJIFlightController object, and the method GetSignalQuality from that object takes a callback as a parameter, which is called when the signal quality is obtained.

I'm still lost...

Erel · Jan 22, 2023

Both the Java code and the B4A code are wrong.

Start with this code:

B4X:

Dim RemoteController As JavaObject = AirCraft.As(JavaObject).RunMethod("getRemoteController", Null)
Dim cc As Object = RemoteController .CreateEventFromUI("dji.common.util.CommonCallbacks.CompletionCallbackWith", "AvailableMasters", Null)
RemoteController.RunMethod("getAvailableMasters", Array(cc ))
Wait For AvailableMasters_Event (MethodName As String, Args() As Object)
Log(MethodName)
Log(Args(0))

If it works then Args(0) should be an array of "Information" and the first entry will include the data you are looking for.

derez · Jan 22, 2023

Erel said:
Both the Java code and the B4A code are wrong.

Start with this code:

B4X:

Dim RemoteController As JavaObject = AirCraft.As(JavaObject).RunMethod("getRemoteController", Null) Dim cc As Object = RemoteController .CreateEventFromUI("dji.common.util.CommonCallbacks.CompletionCallbackWith", "AvailableMasters", Null) RemoteController.RunMethod("getAvailableMasters", Array(cc )) Wait For AvailableMasters_Event (MethodName As String, Args() As Object) Log(MethodName) Log(Args(0))

If it works then Args(0) should be an array of "Information" and the first entry will include the data you are looking for.

Thanks, I'll try it !

derez · Jan 22, 2023

I checked, got for methodname "onFailure" and for args(0) "not supported(255)"
It requires something else if at all.
I use mini 2 which works only using virtual stick methods, not the mission builder, this is probably the reason for the results.

Erel · Jan 23, 2023

I guess the mini 2 doesn't support this feature.

Android Question Signal quality in DJI virtual strick example

derez

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Erel

B4X founder

derez

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derez

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Erel

B4X founder

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Android Question Signal quality in DJI virtual strick example

derez

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Erel

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