KeyStartTakeoff leads to Take off failed: null error

[SteliosPapamichail]

We seem to be getting the following error when calling KeyStartTakeoff: Take off failed: null error where null is the error's description:

    fun takeOff(successCallback: () -> Unit = {}, errorCallback: () -> Unit = {}) {
        FlightControllerKey.KeyStartTakeoff.create().action(
            {
                successCallback()
                Timber.d("DJI/DroneControl:: Started take off")
            }, { e: IDJIError ->
                errorCallback()
                Timber.i("DJI/DroneControl:: Take off failed: ${e.description()}, ${e.errorCode()}")
            }
        )
    }

What could be the cause of this? In the docs I see that the motors should be off for this action to run? Could this mean that the motors are on?

[dji-dev]

Agent comment from YIGUI LIU in Zendesk ticket #140676:

Dear Developer,
Hello and thank you for reaching out to DJI Innovations.

The takeoff fails. It is possible that the sensor has not been initialized completely, or the positioning signal is poor, etc.

You can try to obtain the cause of the takeoff failure through FlightControllerKey.KeyMotorStartFailureError.

In addition, FlightControllerKey.KeyFlightMode and FlightControllerKey.KeyIsFlying can also be used to determine the status of the aircraft.

Best Regards,
DJI Innovations SDK Technical Support Team

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