diff --git a/app/build.gradle b/app/build.gradle
index 20f1c26..318468e 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -11,7 +11,7 @@ android {
         minSdk 28
         targetSdk 28
         versionCode 1
-        versionName "1.19"
+        versionName "2.1"
 
         // 1.0 IDATA广播模式处理
         // 1.1 霍尼韦尔的监听修改（扫描网站二维码跳出程序，监听失效，调整）、斑马PDA广播模式设置
@@ -33,6 +33,7 @@ android {
         // 1.17 霍尼韦尔EDA51、EDA50P，调用扫描枪的方法，在关闭的时候停止调用扫描枪
         // 1.18 瑞兴平板，读取扫描结果，使用同步加锁模式
         // 1.19 index页面接入初始化数据
+        // 2.1 注册PDA的信息存储到文件内部，采取mac+固定加密串的MD5加密校验
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         ndk {
             abiFilters 'armeabi-v7a'
diff --git a/app/src/main/java/chaoran/business/utils/LocalAddressUtil.java b/app/src/main/java/chaoran/business/utils/LocalAddressUtil.java
index bc0d457..2e19bfb 100644
--- a/app/src/main/java/chaoran/business/utils/LocalAddressUtil.java
+++ b/app/src/main/java/chaoran/business/utils/LocalAddressUtil.java
@@ -2,8 +2,8 @@ package chaoran.business.utils;
 
 import android.annotation.SuppressLint;
 import android.app.Activity;
-import android.bluetooth.le.ScanSettings;
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.content.pm.ActivityInfo;
 import android.os.Build;
 import android.util.Log;
@@ -18,13 +18,12 @@ import java.net.NetworkInterface;
 import java.net.SocketException;
 import java.util.Enumeration;
 
-import chaoran.business.BrandEnum;
 import chaoran.business.BuildConfig;
-import chaoran.business.R;
-import chaoran.business.activity.MainActivity;
 
 public class LocalAddressUtil {
 
+    public final static String SSO_KEY = "!~CROP@CRTECH@PDA~!";
+
     private Context context;
 
     private Activity activity;
@@ -160,6 +159,32 @@ public class LocalAddressUtil {
         }
     }
 
+    @SuppressLint("JavascriptInterface")
+    @JavascriptInterface
+    public String registerMac(String applyMac) {
+        try {
+            String mac = this.getMacAddress();
+            String md5Hash = MD5.md5(mac + SSO_KEY);
+            if (md5Hash != null && md5Hash.equals(applyMac)) {
+                // 将允许注册适配的mac写入文件中
+                SharedPreferences.Editor editor = context.getSharedPreferences("CrtechPdaConfig", Context.MODE_PRIVATE).edit();
+                editor.putString("checkMac", "success");
+                editor.commit();
+                return "success";
+            }
+        }catch (Exception ignored) {
+
+        }
+        return "error";
+    }
+
+    @SuppressLint("JavascriptInterface")
+    @JavascriptInterface
+    public String checkMacRegister() {
+        SharedPreferences sharedPreferences = context.getSharedPreferences("CrtechPdaConfig", Context.MODE_PRIVATE);
+        return sharedPreferences.getString("checkMac", "error");
+    }
+
     @SuppressLint("JavascriptInterface")
     @JavascriptInterface
     public String getApkVersion() {
diff --git a/app/src/main/java/chaoran/business/utils/MD5.java b/app/src/main/java/chaoran/business/utils/MD5.java
new file mode 100644
index 0000000..43e29b1
--- /dev/null
+++ b/app/src/main/java/chaoran/business/utils/MD5.java
@@ -0,0 +1,34 @@
+package chaoran.business.utils;
+
+import java.security.MessageDigest;
+
+// 从框架的MD5加密类拷贝过来的
+public class MD5 {
+    private static final String key = "aa";
+    private static final char[] hexDigits = new char[]{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
+
+    public static final String md5(String s) {
+        return s == null ? null : md5(s.getBytes());
+    }
+
+    public static final String md5(byte[] bytes) {
+        try {
+            MessageDigest mdTemp = MessageDigest.getInstance("MD5");
+            mdTemp.update(bytes);
+            byte[] md = mdTemp.digest();
+            int j = md.length;
+            char[] str = new char[j * 2];
+            int k = 0;
+
+            for(int i = 0; i < j; ++i) {
+                byte byte0 = md[i];
+                str[k++] = hexDigits[byte0 >>> 4 & 15];
+                str[k++] = hexDigits[byte0 & 15];
+            }
+
+            return new String(str);
+        } catch (Exception var8) {
+            return null;
+        }
+    }
+}