M300 RTK飞机，MSDK 4.15开发，平板通过USB连接到遥控器，SDK回调问题

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sheng

• 2021年11月14日 07:00
• 已编辑于

在遥控器再开机情况下，启动我的软件的话，会出现以下两种情况：

第一种是只有注册成功，启动连接设备后没有连接成功回调，也没有任何下文了。

第二种情况就是有连接成功回调，但是立马又会来一个断开连接的回调。请问这种情况怎么处理

第三种情况就是连接上，一段时间后，突然连接就断开，Android设备和遥控器一直都是使用USB线连接，没有动过

下面截图就i是，连接上飞行，一段时间后，突然连接就断开，Android设备和遥控器一直都是使用USB线连接，没有动过

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  DJI Developer Support

  • 2021年11月15日 06:58

  1. 第一种这样的情况，退出到桌面，杀掉app再点开就会有回调了。 2. 我遇到过这种情况，不过是app装在遥控器里，退出到桌面，杀掉app再点开。 3. 我其实比较怀疑你的USB线有问题。

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  sheng

  • 2021年11月15日 07:39

  11-15 15:37:10.942 1874 1986 W System.err: at libcore.io.BlockGuardOs.write(BlockGuardOs.java:319)
  11-15 15:37:10.943 1874 1986 W System.err: at libcore.io.IoBridge.write(IoBridge.java:496)
  11-15 15:37:10.943 1874 1986 W System.err: ... 7 more
  11-15 15:37:11.945 1874 1986 W System.err: java.io.IOException: write failed: ENODEV (No such device)
  11-15 15:37:11.946 1874 1986 W System.err: at libcore.io.IoBridge.write(IoBridge.java:501)
  11-15 15:37:11.946 1874 1986 W System.err: at java.io.FileOutputStream.write(FileOutputStream.java:316)
  11-15 15:37:11.946 1874 1986 W System.err: at dji.midware.usb.P3.UsbAccessoryService.sendmessage()
  11-15 15:37:11.946 1874 1986 W System.err: at dji.midware.data.manager.P3.ServiceManager.sendmessage()
  11-15 15:37:11.946 1874 1986 W System.err: at dji.midware.data.manager.P3.bko$nhf.handleMessage()
  11-15 15:37:11.947 1874 1986 W System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
  11-15 15:37:11.947 1874 1986 W System.err: at android.os.Looper.loop(Looper.java:154)
  11-15 15:37:11.947 1874 1986 W System.err: at android.os.HandlerThread.run(HandlerThread.java:61)
  11-15 15:37:11.947 1874 1986 W System.err: Caused by: android.system.ErrnoException: write failed: ENODEV (No such device)
  11-15 15:37:11.948 1874 1986 W System.err: at libcore.io.Posix.writeBytes(Native Method)
  11-15 15:37:11.948 1874 1986 W System.err: at libcore.io.Posix.write(Posix.java:273)
  11-15 15:37:11.948 1874 1986 W System.err: at libcore.io.BlockGuardOs.write(BlockGuardOs.java:319)
  11-15 15:37:11.948 1874 1986 W System.err: at libcore.io.IoBridge.write(IoBridge.java:496)
  11-15 15:37:11.948 1874 1986 W System.err: ... 7 more
  11-15 15:37:12.499 1874 1982 E gfd : receive msg MSG_RETRY_DETECT_ENABLE_TIMEOUT
  11-15 15:37:12.951 1874 1986 W System.err: java.io.IOException: write failed: ENODEV (No such device)
  11-15 15:37:12.951 1874 1986 W System.err: at libcore.io.IoBridge.write(IoBridge.java:501)
  11-15 15:37:12.952 1874 1986 W System.err: at java.io.FileOutputStream.write(FileOutputStream.java:316)
  11-15 15:37:12.952 1874 1986 W System.err: at dji.midware.usb.P3.UsbAccessoryService.sendmessage()
  11-15 15:37:12.952 1874 1986 W System.err: at dji.midware.data.manager.P3.ServiceManager.sendmessage()
  11-15 15:37:12.952 1874 1986 W System.err: at dji.midware.data.manager.P3.bko$nhf.handleMessage()
  11-15 15:37:12.952 1874 1986 W System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
  11-15 15:37:12.952 1874 1986 W System.err: at android.os.Looper.loop(Looper.java:154)
  11-15 15:37:12.952 1874 1986 W System.err: at android.os.HandlerThread.run(HandlerThread.java:61)
  11-15 15:37:12.953 1874 1986 W System.err: Caused by: android.system.ErrnoException: write failed: ENODEV (No such device)
  11-15 15:37:12.953 1874 1986 W System.err: at libcore.io.Posix.writeBytes(Native Method)
  11-15 15:37:12.953 1874 1986 W System.err: at libcore.io.Posix.write(Posix.java:273)
  11-15 15:37:12.953 1874 1986 W System.err: at libcore.io.BlockGuardOs.write(BlockGuardOs.java:319)
  11-15 15:37:12.953 1874 1986 W System.err: at libcore.io.IoBridge.write(IoBridge.java:496)
  11-15 15:37:12.954 1874 1986 W System.err: ... 7 more
  11-15 15:37:13.956 1874 1986 W System.err: java.io.IOException: write failed: ENODEV (No such device)
  11-15 15:37:13.957 1874 1986 W System.err: at libcore.io.IoBridge.write(IoBridge.java:501)
  11-15 15:37:13.957 1874 1986 W System.err: at java.io.FileOutputStream.write(FileOutputStream.java:316)
  11-15 15:37:13.957 1874 1986 W System.err: at dji.midware.usb.P3.UsbAccessoryService.sendmessage()
  11-15 15:37:13.957 1874 1986 W System.err: at dji.midware.data.manager.P3.ServiceManager.sendmessage()
  11-15 15:37:13.957 1874 1986 W System.err: at dji.midware.data.manager.P3.bko$nhf.handleMessage()
  11-15 15:37:13.958 1874 1986 W System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
  11-15 15:37:13.958 1874 1986 W System.err: at android.os.Looper.loop(Looper.java:154)
  11-15 15:37:13.958 1874 1986 W System.err: at android.os.HandlerThread.run(HandlerThread.java:61)
  11-15 15:37:13.958 1874 1986 W System.err: Caused by: android.system.ErrnoException: write failed: ENODEV (No such device)
  11-15 15:37:13.959 1874 1986 W System.err: at libcore.io.Posix.writeBytes(Native Method)
  11-15 15:37:13.959 1874 1986 W System.err: at libcore.io.Posix.write(Posix.java:273)
  11-15 15:37:13.959 1874 1986 W System.err: at libcore.io.BlockGuardOs.write(BlockGuardOs.java:319)
  11-15 15:37:13.959 1874 1986 W System.err: at libcore.io.IoBridge.write(IoBridge.java:496)
  11-15 15:37:13.959 1874 1986 W System.err: ... 7 more
  11-15 15:37:14.954 1874 2138 D MachineOrderUtils: [, , 0]:循环获取机场状态：doorStatus:MachineStatus(status=1, msg=舱门已经打开)---platformStatus:MachineStatus(status=3, msg=平台已上升)---xStatus:MachineStatus(status=1, msg=X轴推
  杆已经打开)---yStatus:MachineStatus(status=1, msg=Y轴推杆已经打开)
  11-15 15:37:14.961 1874 1986 W System.err: java.io.IOException: write failed: ENODEV (No such device)
  11-15 15:37:14.961 1874 1986 W System.err: at libcore.io.IoBridge.write(IoBridge.java:501)
  11-15 15:37:14.962 1874 1986 W System.err: at java.io.FileOutputStream.write(FileOutputStream.java:316)
  11-15 15:37:14.962 1874 1986 W System.err: at dji.midware.usb.P3.UsbAccessoryService.sendmessage()
  11-15 15:37:14.962 1874 1986 W System.err: at dji.midware.data.manager.P3.ServiceManager.sendmessage()
  11-15 15:37:14.962 1874 1986 W System.err: at dji.midware.data.manager.P3.bko$nhf.handleMessage()
  11-15 15:37:14.962 1874 1986 W System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
  11-15 15:37:14.962 1874 1986 W System.err: at android.os.Looper.loop(Looper.java:154)
  11-15 15:37:14.962 1874 1986 W System.err: at android.os.HandlerThread.run(HandlerThread.java:61)
  11-15 15:37:14.962 1874 1986 W System.err: Caused by: android.system.ErrnoException: write failed: ENODEV (No such device)
  11-15 15:37:14.962 1874 1986 W System.err: at libcore.io.Posix.writeBytes(Native Method)
  11-15 15:37:14.962 1874 1986 W System.err: at libcore.io.Posix.write(Posix.java:273)
  11-15 15:37:14.962 1874 1986 W System.err: at libcore.io.BlockGuardOs.write(BlockGuardOs.java:319)
  11-15 15:37:14.962 1874 1986 W System.err: at libcore.io.IoBridge.write(IoBridge.java:496)
  11-15 15:37:14.962 1874 1986 W System.err: ... 7 more

   

  注册成功，没有任何回调，sdk报错如上

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• 

  sheng

  • 2021年11月17日 07:59

  经常出现和遥控器连接断开，logcat错误日志提示connectClose，这是什么情况，应该怎么解决呢？

  

  

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