diff --git a/app_main/build.gradle b/app_main/build.gradle
index b409da6d..2b100af7 100644
--- a/app_main/build.gradle
+++ b/app_main/build.gradle
@@ -54,7 +54,7 @@ dependencies {
 
     // This my project maven from github release!
     implementation 'com.github.xianglin1998:IORedirector:1.0'
-    implementation 'com.github.xianglin1998:Crapto1:1.2'
+    implementation 'com.github.xianglin1998:Crapto1:1.3'
 
     implementation project(':utils')
     implementation project(':libnfc_pn53x')
diff --git a/communication/src/main/java/cn/rrg/com/StandardDriver.java b/app_main/src/main/java/cn/rrg/rdv/driver/StandardDriver.java
similarity index 97%
rename from communication/src/main/java/cn/rrg/com/StandardDriver.java
rename to app_main/src/main/java/cn/rrg/rdv/driver/StandardDriver.java
index 8a9e75a9..09f5f840 100644
--- a/communication/src/main/java/cn/rrg/com/StandardDriver.java
+++ b/app_main/src/main/java/cn/rrg/rdv/driver/StandardDriver.java
@@ -1,4 +1,4 @@
-package cn.rrg.com;
+package cn.rrg.rdv.driver;
 
 import android.content.BroadcastReceiver;
 import android.content.Context;
@@ -10,6 +10,8 @@ import android.util.Log;
 import java.io.IOException;
 
 import cn.dxl.mifare.StdMifareIntent;
+import cn.rrg.com.DevCallback;
+import cn.rrg.com.DriverInterface;
 
 public class StandardDriver implements DriverInterface<String, NfcAdapter> {
 
diff --git a/app_main/src/main/java/cn/rrg/rdv/models/AbsUsb2UartModel.java b/app_main/src/main/java/cn/rrg/rdv/models/AbsUsb2UartModel.java
index 8071a109..25b2ca6e 100644
--- a/app_main/src/main/java/cn/rrg/rdv/models/AbsUsb2UartModel.java
+++ b/app_main/src/main/java/cn/rrg/rdv/models/AbsUsb2UartModel.java
@@ -6,8 +6,6 @@ import android.hardware.usb.UsbManager;
 import android.util.Log;
 
 import cn.dxl.common.util.AppUtil;
-import cn.rrg.com.ContextCallback;
-import cn.rrg.com.ContextHandle;
 import cn.rrg.com.DevCallback;
 import cn.rrg.com.DriverInterface;
 import cn.rrg.com.UsbSerialControl;
diff --git a/app_main/src/main/java/cn/rrg/rdv/models/DriverSource.java b/app_main/src/main/java/cn/rrg/rdv/models/DriverSource.java
index d2f86d65..9dca39b0 100644
--- a/app_main/src/main/java/cn/rrg/rdv/models/DriverSource.java
+++ b/app_main/src/main/java/cn/rrg/rdv/models/DriverSource.java
@@ -5,7 +5,7 @@ import android.util.SparseArray;
 import cn.rrg.com.DriverInterface;
 import cn.rrg.com.SppHasBlock;
 import cn.rrg.com.SppNonBlock;
-import cn.rrg.com.StandardDriver;
+import cn.rrg.rdv.driver.StandardDriver;
 import cn.rrg.com.UniversalBulkTransfer;
 import cn.rrg.com.UsbAcr122Raw;
 import cn.rrg.com.UsbSerialControl;
diff --git a/app_main/src/main/java/cn/rrg/rdv/models/StandardNFCDeviceModel.java b/app_main/src/main/java/cn/rrg/rdv/models/StandardNFCDeviceModel.java
index 9524a9d6..99df60ed 100644
--- a/app_main/src/main/java/cn/rrg/rdv/models/StandardNFCDeviceModel.java
+++ b/app_main/src/main/java/cn/rrg/rdv/models/StandardNFCDeviceModel.java
@@ -6,7 +6,7 @@ import android.nfc.NfcAdapter;
 
 import cn.rrg.com.DevCallback;
 import cn.rrg.com.DriverInterface;
-import cn.rrg.com.StandardDriver;
+import cn.rrg.rdv.driver.StandardDriver;
 import cn.rrg.com.Device;
 import cn.rrg.devices.EmptyDeivce;
 import cn.rrg.rdv.javabean.DevBean;
diff --git a/app_main/src/main/res/values-en/arrays.xml b/app_main/src/main/res/values-en/arrays.xml
index 02cd2052..3f39ab84 100644
--- a/app_main/src/main/res/values-en/arrays.xml
+++ b/app_main/src/main/res/values-en/arrays.xml
@@ -9,7 +9,7 @@
         <item>Slot 5</item>
         <item>Slot 6</item>
         <item>Slot 7</item>
-        <item>Slot 9</item>
+        <item>Slot 8</item>
     </string-array>
 
     <!--变色龙支持模式-->
diff --git a/app_main/src/main/res/values/arrays.xml b/app_main/src/main/res/values/arrays.xml
index 02cd2052..3f39ab84 100644
--- a/app_main/src/main/res/values/arrays.xml
+++ b/app_main/src/main/res/values/arrays.xml
@@ -9,7 +9,7 @@
         <item>Slot 5</item>
         <item>Slot 6</item>
         <item>Slot 7</item>
-        <item>Slot 9</item>
+        <item>Slot 8</item>
     </string-array>
 
     <!--变色龙支持模式-->
diff --git a/chameleon/build.gradle b/chameleon/build.gradle
index 7c359efa..add66c9d 100644
--- a/chameleon/build.gradle
+++ b/chameleon/build.gradle
@@ -21,7 +21,7 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'com.github.xianglin1998:mfkey:1.0'
+    implementation 'com.github.xianglin1998:mfkey:1.1'
     implementation project(path: ':utils')
 
     implementation 'androidx.appcompat:appcompat:1.1.0'
diff --git a/chameleon/src/main/java/cn/rrg/chameleon/javabean/DetectionDatas.java b/chameleon/src/main/java/cn/rrg/chameleon/javabean/DetectionDatas.java
index c37e8682..f83cfba9 100644
--- a/chameleon/src/main/java/cn/rrg/chameleon/javabean/DetectionDatas.java
+++ b/chameleon/src/main/java/cn/rrg/chameleon/javabean/DetectionDatas.java
@@ -1,6 +1,6 @@
 package cn.rrg.chameleon.javabean;
 
-import cn.rrg.mfkey.Nonce32;
+import com.dxl.mfkey.Nonce32;
 
 public class DetectionDatas {
     //数据对应的UID
diff --git a/chameleon/src/main/java/cn/rrg/chameleon/utils/ChameleonDetection.java b/chameleon/src/main/java/cn/rrg/chameleon/utils/ChameleonDetection.java
index 168f42f2..f7f9e018 100644
--- a/chameleon/src/main/java/cn/rrg/chameleon/utils/ChameleonDetection.java
+++ b/chameleon/src/main/java/cn/rrg/chameleon/utils/ChameleonDetection.java
@@ -1,12 +1,13 @@
 package cn.rrg.chameleon.utils;
 
+import com.dxl.mfkey.NativeMfKey32;
+import com.dxl.mfkey.Nonce32;
+
 import java.util.List;
 
 import cn.dxl.mifare.MifareUtils;
 import cn.rrg.chameleon.javabean.ResultBean;
 import cn.rrg.chameleon.javabean.DetectionDatas;
-import cn.rrg.mfkey.NativeMfKey32;
-import cn.rrg.mfkey.Nonce32;
 import cn.dxl.common.util.HexUtil;
 
 /**
diff --git a/chameleon/src/main/java/cn/rrg/chameleon/utils/DetectionResult.java b/chameleon/src/main/java/cn/rrg/chameleon/utils/DetectionResult.java
index 636aa861..51bfd7e9 100644
--- a/chameleon/src/main/java/cn/rrg/chameleon/utils/DetectionResult.java
+++ b/chameleon/src/main/java/cn/rrg/chameleon/utils/DetectionResult.java
@@ -1,12 +1,13 @@
 package cn.rrg.chameleon.utils;
 
+import com.dxl.mfkey.Nonce32;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
 import cn.dxl.mifare.MifareUtils;
 import cn.rrg.chameleon.javabean.DetectionDatas;
-import cn.rrg.mfkey.Nonce32;
 import cn.dxl.common.util.HexUtil;
 
 /**
diff --git a/communication/src/main/java/cn/dxl/com/Com.java b/communication/src/main/java/cn/dxl/com/Com.java
index 77331faf..a06de610 100644
--- a/communication/src/main/java/cn/dxl/com/Com.java
+++ b/communication/src/main/java/cn/dxl/com/Com.java
@@ -1,5 +1,7 @@
 package cn.dxl.com;
 
+import android.util.Log;
+
 import java.io.IOException;
 import java.io.Serializable;
 import java.nio.ByteBuffer;
@@ -57,15 +59,26 @@ public final class Com implements Serializable {
      * @return init communication, true is successful or false is error!sss
      */
     public static boolean initCom(Communication communication, Device dev) {
+        if (communication == null) throw new RuntimeException("The communication impl is null.");
+        if (dev == null) throw new RuntimeException("The device impl is null.");
         //初始化通信实现
         mCommunication = communication;
         //判断端口是否正常初始化
+        boolean ret = false;
         try {
-            return dev.working();
+            ret = dev.working();
         } catch (IOException e) {
             e.printStackTrace();
-            return false;
         }
+        // open failed, we need
+        if (!ret) {
+            try {
+                dev.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        return ret;
     }
 
     /**
@@ -75,6 +88,7 @@ public final class Com implements Serializable {
      * @throws IOException IOException in write error.
      */
     private static int write() throws IOException {
+        logCommunicationNonnull();
         if (mCommunication == null) return -1;
         //加上偏移值
         //try {
@@ -93,6 +107,7 @@ public final class Com implements Serializable {
      * @throws IOException IOException in read error.
      */
     private static int read() throws IOException {
+        logCommunicationNonnull();
         if (mCommunication == null) return -1;
         //try {
         return mCommunication.read(recv_buffer.array(),
@@ -107,6 +122,7 @@ public final class Com implements Serializable {
      * flush data, clear buffer!
      */
     private static void flush() throws IOException {
+        logCommunicationNonnull();
         if (mCommunication == null) return;
         //try {
         mCommunication.flush();
@@ -127,6 +143,13 @@ public final class Com implements Serializable {
         //}
     }
 
+    private static void logCommunicationNonnull() {
+        if (mCommunication == null) {
+            Log.e("Com", "Error: the communication interface implement cannot null!");
+            Log.e("Com", "错误: Communication接口的实现不可以为空，否则数据传输将不起作用!");
+        }
+    }
+
     /*
      * author DXL
      * some communication native function
diff --git a/communication/src/main/java/cn/rrg/com/ContextCallback.java b/communication/src/main/java/cn/rrg/com/ContextCallback.java
deleted file mode 100644
index e2b1c92a..00000000
--- a/communication/src/main/java/cn/rrg/com/ContextCallback.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package cn.rrg.com;
-
-import android.content.Context;
-
-public interface ContextCallback {
-    //留一个接口进行上下文获取!
-    Context getContext();
-}
diff --git a/communication/src/main/java/cn/rrg/com/ContextHandle.java b/communication/src/main/java/cn/rrg/com/ContextHandle.java
deleted file mode 100644
index 98d0f126..00000000
--- a/communication/src/main/java/cn/rrg/com/ContextHandle.java
+++ /dev/null
@@ -1,16 +0,0 @@
-package cn.rrg.com;
-
-import android.content.Context;
-
-public class ContextHandle implements ContextCallback {
-    private ContextCallback callback;
-
-    public void setContextCallback(ContextCallback callback) {
-        this.callback = callback;
-    }
-
-    @Override
-    public Context getContext() {
-        return callback.getContext();
-    }
-}
diff --git a/libnfc_pn53x/src/main/cpp/mfcuk/mfcuk.c b/libnfc_pn53x/src/main/cpp/mfcuk/mfcuk.c
index 601fd9a4..3b65c742 100644
--- a/libnfc_pn53x/src/main/cpp/mfcuk/mfcuk.c
+++ b/libnfc_pn53x/src/main/cpp/mfcuk/mfcuk.c
@@ -861,6 +861,7 @@ static bool mfcuk_darkside_select_tag(nfc_device *pnd, int iSleepAtFieldOFF, int
 
     return true;
 }
+
 // check nack
 static bool
 valid_prng_check(nfc_device *pnd, nfc_target_info *target) {
diff --git a/libnfc_pn53x/src/main/java/cn/rrg/natives/MfcukTools.java b/libnfc_pn53x/src/main/java/cn/rrg/natives/MfcukTools.java
index 832fed1e..da636d8e 100644
--- a/libnfc_pn53x/src/main/java/cn/rrg/natives/MfcukTools.java
+++ b/libnfc_pn53x/src/main/java/cn/rrg/natives/MfcukTools.java
@@ -8,7 +8,7 @@ public class MfcukTools implements ICommandTools {
      * */
     static {
         System.loadLibrary("mfcuk");
-    } 
+    }
 
     @Override
     public native int startExecute(String cmd);