MSDK 5.9.0 + DJI Mini 3 Pro - Virtual stick problem

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Marvelmind Robotics

• July 27, 2024 15:42

Hello

I' m trying to develop an Android app based on MSDK v5.9.0 example to control DJI Mini 3 pro via RC-N1 controller.

I'm using virtual stick mode - enable virtual stick by calling "virtualStickVM.enableVirtualStick" and control the drone by sending "virtualStickVM.setLeftPosition" and "virtualStickVM.setRightPosition" with 10 Hz rate. Hardware switch on RC controller stays in "Normal" position. 

I'm noted that sometimes drone is flying fine, but sometimes it stops after takeoff and continues to hover not responding on any virtual stick commands. Landing command is also not executed even when "landing confirmation" command is sent. Monitoring of the virtual stick status says the virtual stick is still enabled. 

It seems the only difference of flight status in cases of fine flight and no flight is in FlightMode. Every time when the drone flies well, the flight mode returned by FlightControllerKey.KeyFlightMode is "VIRTUAL_STICK". When drone doesn't fly, this status is "GPS_NORMAL". 

I didn't find any special command to enter "VIRTUAL_STICK" mode. Can you please tell me what command I need to execute or what conditions I need to fulfill to make sure the drone will be in the "VIRTUAL_STICK" mode and execute my virtual stick commands.

Thank you very much in advance

 

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  DJI Developer Support

  • July 29, 2024 08:31

  The command 'virtualStickVM.enableVirtualStick' puts the aircraft into 'VIRTUAL_STICK' mode. Could you verify that the aircraft has completed takeoff when you requested it to enter virtual stick mode? It is not possible to enter virtual stick mode during takeoff.

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  Marvelmind Robotics

  • July 30, 2024 10:54

  Thank you for your help.

  I called 'virtualStickVM.enableVirtualStick' before takeoff, and not repeated this command after takeoff, because 'virtualStickVM.currentVirtualStickStateInfo.value?.state?.isVirtualStickEnable' returned true every time I check it. It seems repeated call of 'virtualStickVM.enableVirtualStick' after takeoff solves the problem, thank you.

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  DJI Developer Support

  • July 31, 2024 08:28

  I'm glad that your issue has been resolved. The takeoff action will interrupt the Virtual Stick, so it's better to activate the virtual joystick after completing the takeoff.

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