#0. Crashed: Thread-635
       at android.hardware.usb.UsbDevice.getInterface(UsbDevice.java:232)
       at com.felhr.usbserial.CH34xSerialDevice.(CH34xSerialDevice.java:109)
       at com.felhr.usbserial.UsbSerialDevice.createUsbSerialDevice(UsbSerialDevice.java:78)
       at com.felhr.usbserial.UsbSerialDevice.createUsbSerialDevice(UsbSerialDevice.java:58)
       at in.co.gorest.grblcontroller.service.GrblUsbSerialService$ConnectionThread.run(GrblUsbSerialService.java:318)

--

Fatal Exception: java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
       at android.hardware.usb.UsbDevice.getInterface(UsbDevice.java:232)
       at com.felhr.usbserial.CH34xSerialDevice.(CH34xSerialDevice.java:109)
       at com.felhr.usbserial.UsbSerialDevice.createUsbSerialDevice(UsbSerialDevice.java:78)
       at com.felhr.usbserial.UsbSerialDevice.createUsbSerialDevice(UsbSerialDevice.java:58)
       at in.co.gorest.grblcontroller.service.GrblUsbSerialService$ConnectionThread.run(GrblUsbSerialService.java:318)

#0. Crashed: Thread-635
       at android.hardware.usb.UsbDevice.getInterface(UsbDevice.java:232)
       at com.felhr.usbserial.CH34xSerialDevice.(CH34xSerialDevice.java:109)
       at com.felhr.usbserial.UsbSerialDevice.createUsbSerialDevice(UsbSerialDevice.java:78)
       at com.felhr.usbserial.UsbSerialDevice.createUsbSerialDevice(UsbSerialDevice.java:58)
       at in.co.gorest.grblcontroller.service.GrblUsbSerialService$ConnectionThread.run(GrblUsbSerialService.java:318)

#1. HeapTrimmerDaemon
       at dalvik.system.VMRuntime.trimHeap(VMRuntime.java)
       at java.lang.Daemons$HeapTrimmerDaemon.run(Daemons.java:313)
       at java.lang.Thread.run(Thread.java:818)

#2. Queue
       at java.lang.Object.wait(Object.java)
       at java.lang.Thread.parkFor(Thread.java:1220)
       at sun.misc.Unsafe.park(Unsafe.java:299)
       at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
       at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016)
       at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.performOperation(DependencyPriorityBlockingQueue.java:197)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.get(DependencyPriorityBlockingQueue.java:236)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:65)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:46)
       at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)

#3. Queue
       at java.lang.Object.wait(Object.java)
       at java.lang.Thread.parkFor(Thread.java:1220)
       at sun.misc.Unsafe.park(Unsafe.java:299)
       at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
       at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016)
       at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.performOperation(DependencyPriorityBlockingQueue.java:197)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.get(DependencyPriorityBlockingQueue.java:236)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:65)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:46)
       at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)

#4. FinalizerDaemon
       at java.lang.Object.wait(Object.java)
       at java.lang.Object.wait(Object.java:422)
       at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:101)
       at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:72)
       at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:174)
       at java.lang.Thread.run(Thread.java:818)

#5. Queue
       at java.lang.Object.wait(Object.java)
       at java.lang.Thread.parkFor(Thread.java:1220)
       at sun.misc.Unsafe.park(Unsafe.java:299)
       at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
       at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016)
       at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.performOperation(DependencyPriorityBlockingQueue.java:197)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.get(DependencyPriorityBlockingQueue.java:236)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:65)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:46)
       at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)

#6. GCDaemon
       at java.lang.Object.wait(Object.java)
       at java.lang.Daemons$GCDaemon.run(Daemons.java:344)
       at java.lang.Thread.run(Thread.java:818)

#7. Thread-635
       at java.lang.Object.wait(Object.java)
       at java.lang.Thread.parkFor(Thread.java:1220)
       at sun.misc.Unsafe.park(Unsafe.java:299)
       at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
       at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:400)
       at java.util.concurrent.FutureTask.get(FutureTask.java:162)
       at com.crashlytics.android.core.CrashlyticsBackgroundWorker.submitAndWait(CrashlyticsBackgroundWorker.java:43)
       at com.crashlytics.android.core.CrashlyticsController.handleUncaughtException(CrashlyticsController.java:312)
       at com.crashlytics.android.core.CrashlyticsController$6.onUncaughtException(CrashlyticsController.java:296)
       at com.crashlytics.android.core.CrashlyticsUncaughtExceptionHandler.uncaughtException(CrashlyticsUncaughtExceptionHandler.java:30)
       at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693)
       at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690)

#8. Crashlytics Report Uploader
       at java.lang.Thread.sleep(Thread.java)
       at java.lang.Thread.sleep(Thread.java:1031)
       at java.lang.Thread.sleep(Thread.java:985)
       at com.crashlytics.android.core.ReportUploader$Worker.attemptUploadWithRetry(ReportUploader.java:200)
       at com.crashlytics.android.core.ReportUploader$Worker.onRun(ReportUploader.java:185)
       at io.fabric.sdk.android.services.common.BackgroundPriorityRunnable.run(BackgroundPriorityRunnable.java:30)
       at java.lang.Thread.run(Thread.java:818)

#9. Crashlytics Exception Handler1
       at dalvik.system.VMStack.getThreadStackTrace(VMStack.java)
       at java.lang.Thread.getStackTrace(Thread.java:580)
       at java.lang.Thread.getAllStackTraces(Thread.java:522)
       at com.crashlytics.android.core.CrashlyticsController.writeSessionEvent(CrashlyticsController.java:1317)
       at com.crashlytics.android.core.CrashlyticsController.writeFatal(CrashlyticsController.java:1004)
       at com.crashlytics.android.core.CrashlyticsController.access$400(CrashlyticsController.java:67)
       at com.crashlytics.android.core.CrashlyticsController$7.call(CrashlyticsController.java:319)
       at com.crashlytics.android.core.CrashlyticsController$7.call(CrashlyticsController.java:312)
       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at io.fabric.sdk.android.services.common.ExecutorUtils$1$1.onRun(ExecutorUtils.java:75)
       at io.fabric.sdk.android.services.common.BackgroundPriorityRunnable.run(BackgroundPriorityRunnable.java:30)
       at java.lang.Thread.run(Thread.java:818)

#10. main
       at java.lang.System.currentTimeMillis(System.java)
       at android.widget.TextView.onMeasure(TextView.java:7690)
       at android.view.View.measure(View.java:17921)
       at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1473)
       at android.widget.TableRow.onMeasure(TableRow.java:114)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1692)
       at android.widget.TableLayout.measureChildBeforeLayout(TableLayout.java:464)
       at android.widget.LinearLayout.measureVertical(LinearLayout.java:760)
       at android.widget.TableLayout.measureVertical(TableLayout.java:476)
       at android.widget.TableLayout.onMeasure(TableLayout.java:439)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1692)
       at android.widget.LinearLayout.measureVertical(LinearLayout.java:760)
       at android.widget.LinearLayout.onMeasure(LinearLayout.java:629)
       at android.view.View.measure(View.java:17921)
       at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1286)
       at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
       at android.widget.ScrollView.onMeasure(ScrollView.java:342)
       at android.view.View.measure(View.java:17921)
       at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1632)
       at android.view.View.measure(View.java:17921)
       at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:846)
       at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:512)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
       at android.support.v7.widget.CardView.onMeasure(CardView.java:218)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1692)
       at android.widget.LinearLayout.measureVertical(LinearLayout.java:760)
       at android.widget.LinearLayout.onMeasure(LinearLayout.java:629)
       at android.view.View.measure(View.java:17921)
       at android.support.constraint.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:934)
       at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java:973)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:719)
       at android.support.design.widget.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:91)
       at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1361)
       at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:789)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
       at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1692)
       at android.widget.LinearLayout.measureVertical(LinearLayout.java:760)
       at android.widget.LinearLayout.onMeasure(LinearLayout.java:629)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1692)
       at android.widget.LinearLayout.measureVertical(LinearLayout.java:760)
       at android.widget.LinearLayout.onMeasure(LinearLayout.java:629)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
       at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2740)
       at android.view.View.measure(View.java:17921)
       at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2434)
       at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1442)
       at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1666)
       at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1320)
       at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6704)
       at android.view.Choreographer$CallbackRecord.run(Choreographer.java:800)
       at android.view.Choreographer.doCallbacks(Choreographer.java:603)
       at android.view.Choreographer.doFrame(Choreographer.java:572)
       at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:786)
       at android.os.Handler.handleCallback(Handler.java:815)
       at android.os.Handler.dispatchMessage(Handler.java:104)
       at android.os.Looper.loop(Looper.java:194)
       at android.app.ActivityThread.main(ActivityThread.java:5624)
       at java.lang.reflect.Method.invoke(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:372)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)

#11. Queue
       at java.lang.Object.wait(Object.java)
       at java.lang.Thread.parkFor(Thread.java:1220)
       at sun.misc.Unsafe.park(Unsafe.java:299)
       at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
       at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016)
       at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.performOperation(DependencyPriorityBlockingQueue.java:197)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.get(DependencyPriorityBlockingQueue.java:236)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:65)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:46)
       at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)

#12. pool-3-thread-1
       at java.lang.Object.wait(Object.java)
       at java.lang.Thread.parkFor(Thread.java:1220)
       at sun.misc.Unsafe.park(Unsafe.java:299)
       at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
       at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016)
       at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:410)
       at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)

#13. ReferenceQueueDaemon
       at java.lang.Object.wait(Object.java)
       at java.lang.Daemons$ReferenceQueueDaemon.run(Daemons.java:134)
       at java.lang.Thread.run(Thread.java:818)

#14. FinalizerWatchdogDaemon
       at java.lang.Thread.sleep(Thread.java)
       at java.lang.Thread.sleep(Thread.java:1031)
       at java.lang.Thread.sleep(Thread.java:985)
       at java.lang.Daemons$FinalizerWatchdogDaemon.sleepFor(Daemons.java:258)
       at java.lang.Daemons$FinalizerWatchdogDaemon.waitForFinalization(Daemons.java:269)
       at java.lang.Daemons$FinalizerWatchdogDaemon.run(Daemons.java:217)
       at java.lang.Thread.run(Thread.java:818)

#15. Queue
       at java.lang.Object.wait(Object.java)
       at java.lang.Thread.parkFor(Thread.java:1220)
       at sun.misc.Unsafe.park(Unsafe.java:299)
       at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
       at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2016)
       at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.performOperation(DependencyPriorityBlockingQueue.java:197)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.get(DependencyPriorityBlockingQueue.java:236)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:65)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:46)
       at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)

#16. Answers Events Handler1
       at java.lang.Object.wait(Object.java)
       at java.lang.Thread.parkFor(Thread.java:1220)
       at sun.misc.Unsafe.park(Unsafe.java:299)
       at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:197)
       at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2055)
       at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1060)
       at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:776)
       at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at io.fabric.sdk.android.services.common.ExecutorUtils$1$1.onRun(ExecutorUtils.java:75)
       at io.fabric.sdk.android.services.common.BackgroundPriorityRunnable.run(BackgroundPriorityRunnable.java:30)
       at java.lang.Thread.run(Thread.java:818)

#17. OkHttp ConnectionPool
       at java.lang.Object.wait(Object.java)
       at java.lang.Thread.parkFor(Thread.java:1220)
       at sun.misc.Unsafe.park(Unsafe.java:299)
       at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:197)
       at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2055)
       at java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:435)
       at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1035)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1097)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)