Issue with RTK Health Status in DJI MSDK

Hello DJI Support,

I am a Kotlin developer working with the DJI MSDK V5 and using RTK functionalities with M350. I am facing an issue where the RTK system reports conflicting states. Here’s my setup:

I use callbackFlow to observe rtkHealthy and RTKServiceState.
I also implement startRtkCustomNetworkService() and stopRtkCustomNetworkService() to manage RTK connections.
Before calling stopRtkCustomNetworkService() and startRtkCustomNetworkService(), I update the RTK network settings using
```
rtkCenter.customRTKManager.customNetworkRTKSettings = settings
```
which sets new values for the server address, port, username, password, and mount point.

When I call stopRtkCustomNetworkService() then startRtkCustomNetworkService(), the logs show that the RTK network transitions as follows:

DISABLED
RTK_START_PROCESSING
READY
TRANSMITTING
TRANSMITTING again

However, despite the network being in TRANSMITTING, the rtkHealthy state remains false. Even after stopping and restarting the RTK service, this value does not change.

Questions:

Why is rtkHealthy still false even when the RTK network is in TRANSMITTING state?
Is there an additional condition that must be met for rtkHealthy to become true?
Should I wait for a specific event or state transition before expecting rtkHealthy to update correctly?

Below is my implementation for reference:

Fun stop and start

private fun stopRtkCustomNetworkService() {
    logger.i("RTK trying to stop connection")
    rtkCenter.customRTKManager.stopNetworkRTKService(
        object :
            CommonCallbacks.CompletionCallback {
            override fun onSuccess() {
                logger.i("RTK Connection stopped")
            }

            override fun onFailure(error: IDJIError) {
                logger.e("RTK failed to stop connection: ${error.description()}")
            }
        })
}

private fun startRtkCustomNetworkService() {
    rtkCenter.customRTKManager.startNetworkRTKService(CoordinateSystem.UNKNOWN, object :
        CommonCallbacks.CompletionCallback {
        override fun onSuccess() {
            logger.i("RTK settings successfully transmitted | Start converging")
        }

        override fun onFailure(error: IDJIError) {
            logger.e("RTK failed connection to network: ${error.description()}")
        }
    })

    logger.i("RTK try start connection with: ${rtkCenter.customRTKManager.customNetworkRTKSettings}")
}

with rtkCenter :

rtkCenter = RTKCenter.getInstance()

Keys information :

val isHealthyFlow = callbackFlow {
    val listener = RTKSystemStateListener {
        logger.d("isHealthyFlow emitted: ${it.rtkHealthy}")
        trySend(it.rtkHealthy).onFailure { error ->
            logger.e("Failed to send isHealthyFlow state: $error")
        }
    }
    logger.d("init RTKConnexionObservable")
    rtkCenter.addRTKSystemStateListener(listener)
    awaitClose { rtkCenter.removeRTKSystemStateListener(listener) }
}
val networkStatusFlow: Flow<RTKServiceState> = callbackFlow {
    val listener = object : INetworkServiceInfoListener {
        override fun onServiceStateUpdate(state: RTKServiceState) {
            scope.launch(Dispatchers.Main) { // Ensure execution on the main thread
                logger.d("networkStatusFlow emitted: $state")
                trySend(state).isSuccess
            }
        }

        override fun onErrorCodeUpdate(code: IDJIError?) {
            logger.e("Failed to send networkStatusFlow state: $code")
        }
    }
    listener.onServiceStateUpdate(RTKServiceState.UNKNOWN)
    logger.d("init networkStatusFlow")
    rtkCenter.customRTKManager.addNetworkRTKServiceInfoListener(listener)

    awaitClose {
        rtkCenter.customRTKManager.removeNetworkRTKServiceInfoListener(listener)
    }
}

Thank you for your help!

Best regards,
Victor

Issue with RTK Health Status in DJI MSDK

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