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magnusja / libaums

Open source library to access USB Mass Storage devices on Android without rooting your device
Apache License 2.0
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New questions about libaums #358

Closed makeking closed 1 year ago

makeking commented 1 year ago

Today, I used the libaums library and found that there were multiple failures when exporting data, so I checked the logs for troubleshooting. There are two situations:

First: No JNI_OnLoad found in /data/app-lib/com.bete.turbidity-2/liberrno-lib.so 0x41f29f28, skipping init java.io.IOException: Could not read from device, result == -1 errno 110 Connection timed out

Seconed : I/UsbMassStorageDevice: found usb device: UsbDevice[mName=/dev/bus/usb/001/007,mVendorId=1921,mProductId=21905,mClass=0,mSubclass=0,mProtocol=0,mInterfaces=[Landroid.os.Parcelable;@42639068] I/UsbMassStorageDevice: found usb interface: UsbInterface[mId=0,mClass=8,mSubclass=6,mProtocol=80,mEndpoints=[Landroid.os.Parcelable;@426390f8] found usb endpoint: UsbEndpoint[mAddress=129,mAttributes=2,mMaxPacketSize=512,mInterval=0] found usb endpoint: UsbEndpoint[mAddress=2,mAttributes=2,mMaxPacketSize=512,mInterval=0] D/UsbMassStorageDevice: setup device I/UsbMassStorageDevice: MAX LUN 0 W/System.err: java.io.IOException: Could not write to device, result == -1 errno 110 Connection timed out W/System.err: at com.github.mjdev.libaums.usb.JellyBeanMr2Communication.bulkOutTransfer(JellyBeanMr2Communication.java:45) at com.github.mjdev.libaums.driver.scsi.ScsiBlockDevice.transferCommand(ScsiBlockDevice.java:143) at com.github.mjdev.libaums.driver.scsi.ScsiBlockDevice.init(ScsiBlockDevice.java:86) at com.github.mjdev.libaums.UsbMassStorageDevice.setupDevice(UsbMassStorageDevice.java:231) at com.github.mjdev.libaums.UsbMassStorageDevice.init(UsbMassStorageDevice.java:191) at com.bete.turbidity.ui.view.ExportDataView$1.onClick(ExportDataView.java:190) at android.view.View.performClick(View.java:4463) W/System.err: at android.view.View$PerformClick.run(View.java:18789) at android.os.Handler.handleCallback(Handler.java:808) at android.os.Handler.dispatchMessage(Handler.java:103) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:5325) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825) W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:641) at dalvik.system.NativeStart.main(Native Method)

So, I want to know the answers to these two questions, Thanks!

magnusja commented 1 year ago

The connection to the USB device times out. Try another OTG adapter.