I'm working to implement the version 2.0.4.192 of the Zebra SDK to scan RFID tags with RFD40 handheld and TC53 android phone.
When testing the SampleApp provide with the SDK if I remove and reattach the device via USB then the sample can't reconnect and I have to kill the application and relaunch it.
The logs throw an execption OperationFailureException with the error code RFID_API_COMMAND_TIMEOUT when we call the function reader.connect() . The scan completely stop working and the trigger is not event recognized.
I tried to up the reader timeout with reader.setTimeout(10000) before the connect but it is not working.
Have anyone experience this issue and if so how did you solve the problem ?
Here is the sample code that create the problem :
private synchronized String connect() {
if (reader != null) {
Log.d(TAG, "connect " + reader.getHostName());
try {
if (!reader.isConnected()) {
// Establish connection to the RFID Reader
reader.setTimeout(10000);
reader.connect();
ConfigureReader();
//Call this function if the readerdevice supports scanner to setup scanner SDK
//setupScannerSDK();
if (reader.isConnected()) {
return "Connected: " + reader.getHostName();
}
}
} catch (InvalidUsageException e) {
e.printStackTrace();
} catch (OperationFailureException e) {
e.printStackTrace();
Log.d(TAG, "OperationFailureException " + e.getVendorMessage());
String des = e.getResults().toString();
return "Connection failed" + e.getVendorMessage() + " " + des;
}
}
return "";
}
And the stacktrace :
2025-08-26 16:59:30.000 31235-31270 IRFIDinfo com.zebra.rfid.demo.sdksample D GetResponseDataReceived GetCapabilities tm 2000
2025-08-26 16:59:30.019 31235-31367 RFIDSerialIOMgr com.zebra.rfid.demo.sdksample I Stopping mState=STOPPED
2025-08-26 16:59:32.001 31235-31270 IRFIDError com.zebra.rfid.demo.sdksample D RFIDPROTOAscii: GetStatus: RFID_API_COMMAND_TIMEOUTGetCapabilities size 0
2025-08-26 16:59:32.001 31235-31270 IRFIDinfo com.zebra.rfid.demo.sdksample D logError RFID_API_COMMAND_TIMEOUT Response timeout
2025-08-26 16:59:32.002 31235-31270 IRFIDinfo com.zebra.rfid.demo.sdksample D getLinkProfilesCaps results : RFID_API_COMMAND_TIMEOUT
2025-08-26 16:59:32.002 31235-31270 IRFIDinfo com.zebra.rfid.demo.sdksample D getLinkProfilesCaps results : RFID_API_COMMAND_TIMEOUT
2025-08-26 16:59:32.007 31235-31270 System.err com.zebra.rfid.demo.sdksample W com.zebra.rfid.api3.OperationFailureException
2025-08-26 16:59:32.009 31235-31270 System.err com.zebra.rfid.demo.sdksample W at com.zebra.rfid.api3.ProcessErrorCode.ThrowException(ProcessErrorCode.java:16)
2025-08-26 16:59:32.009 31235-31270 System.err com.zebra.rfid.demo.sdksample W at com.zebra.rfid.api3.RFIDReader.postConnectInitialize(RFIDReader.java:328)
2025-08-26 16:59:32.010 31235-31270 System.err com.zebra.rfid.demo.sdksample W at com.zebra.rfid.api3.RFIDReader.connect(RFIDReader.java:686)
2025-08-26 16:59:32.010 31235-31270 System.err com.zebra.rfid.demo.sdksample W at com.zebra.rfid.demo.sdksample.RFIDHandler.connect(RFIDHandler.java:834)
2025-08-26 16:59:32.011 31235-31270 System.err com.zebra.rfid.demo.sdksample W at com.zebra.rfid.demo.sdksample.RFIDHandler.access$800(RFIDHandler.java:46)
2025-08-26 16:59:32.011 31235-31270 System.err com.zebra.rfid.demo.sdksample W at com.zebra.rfid.demo.sdksample.RFIDHandler$ConnectionTask.doInBackground(RFIDHandler.java:767)
2025-08-26 16:59:32.014 31235-31270 System.err com.zebra.rfid.demo.sdksample W at com.zebra.rfid.demo.sdksample.RFIDHandler$ConnectionTask.doInBackground(RFIDHandler.java:761)
2025-08-26 16:59:32.015 31235-31270 System.err com.zebra.rfid.demo.sdksample W at android.os.AsyncTask$3.call(AsyncTask.java:394)
2025-08-26 16:59:32.015 31235-31270 System.err com.zebra.rfid.demo.sdksample W at java.util.concurrent.FutureTask.run(FutureTask.java:317)
2025-08-26 16:59:32.016 31235-31270 System.err com.zebra.rfid.demo.sdksample W at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
2025-08-26 16:59:32.016 31235-31270 System.err com.zebra.rfid.demo.sdksample W at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
2025-08-26 16:59:32.017 31235-31270 System.err com.zebra.rfid.demo.sdksample W at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:651)
2025-08-26 16:59:32.017 31235-31270 System.err com.zebra.rfid.demo.sdksample W at java.lang.Thread.run(Thread.java:1119)
2025-08-26 16:59:32.017 31235-31270 RFID_SAMPLE com.zebra.rfid.demo.sdksample D OperationFailureException Response timeout
2025-08-26 16:59:45.766 31235-31248 System com.zebra.rfid.demo.sdksample W A resource failed to call close.
2025-08-26 16:59:45.769 31235-31248 System com.zebra.rfid.demo.sdksample W A resource failed to call UsbRequest.close.
2025-08-26 16:59:45.769 31235-31248 UsbRequestJNI com.zebra.rfid.demo.sdksample D close
2025-08-26 16:59:45.770 31235-31248 System com.zebra.rfid.demo.sdksample W A resource failed to call UsbRequest.close.
2025-08-26 16:59:45.770 31235-31248 UsbRequestJNI com.zebra.rfid.demo.sdksample D close
