update doc

.idea/compiler.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="9" />
+    <bytecodeTargetLevel target="1.8" />
   </component>
 </project>

.idea/gradle.xml

         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="gradleHome" value="$APPLICATION_HOME_DIR$/gradle/gradle-5.1.1" />
-        <option name="gradleJvm" value="1.8 (2)" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />
+        <option name="useQualifiedModuleNames" value="true" />
       </GradleProjectSettings>
     </option>
   </component>

.idea/misc.xml

       <configuration PROFILE_NAME="Debug" CONFIG_NAME="Debug" />
     </configurations>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

README.md

 byte[] mcuEncrypt(int cid, String mac, byte[] payload);
 
 
+/**
+ Broadcast data decryption method
+ */
+byte[] decryptBroadcast(int cid, int vid,int pid, byte[] payload);
+
 ```
 
 ### 5、How to use

README_zh.md

 byte[] mcuEncrypt(int cid, String mac, byte[] payload);
 
 
+
+/**
+ A7数据加密方法,cid为产品ID,ble协议中会包含
+ */
+byte[] mcuEncrypt(int cid, String mac, byte[] payload);
+
+/**
+ 广播数据解密方法
+ */
+byte[] decryptBroadcast(int cid, int vid,int pid, byte[] payload);
+
 ```
 
 ### 五、使用方法

app/build.gradle

     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
 
-    implementation 'com.github.elinkthings:AILinkSecretAndroid:1.0.0'
+    implementation 'com.github.elinkthings:AILinkSecretAndroid:2.0.0'
 }

app/src/main/java/com/elinkthings/ailinksecrettooldemo/AnalyticalDataUtil.java

     }
 
 
+
+    /**
+     * 将广播数据进行解密
+     *
+     * @param cid     cid
+     * @param vid     vid
+     * @param pid   pid
+     * @param payload byte[]
+     * @return byte[]
+     */
+    public byte[] decryptBroadcast(int cid, int vid,int pid, byte[] payload) {
+        byte[] data = null;
+        if (payload != null && payload.length >= 1) {
+            data = AiLinkBleCheckUtil.decryptBroadcast(cid, vid, pid,payload);
+        }
+        return data;
+    }
+
     public void close() {
         if (mBluetoothGatt != null) {
             mBluetoothGatt.disconnect();

app/src/main/java/com/elinkthings/ailinksecrettooldemo/MainActivity.java

             super.onScanResult(callbackType, result);
             String address = result.getDevice().getAddress();
             saveScanData(address);
+//            SparseArray<byte[]> manufacturerSpecificData = result.getScanRecord().getManufacturerSpecificData();//获取自定义厂商数据列表,正常情况只有1个
+//            if (manufacturerSpecificData.size() > 0) {
+//                byte[] data = manufacturerSpecificData.get(0);
+//                decryptBroadcastExample(data);
+//            }
 
         }
 
         }
     }
 
+
+    /**
+     * 解密广播数据参考例子
+     * @param data 自定义厂商数据
+     */
+    private void decryptBroadcastExample(byte[] data){
+            if (data.length < 3)
+                return;
+            byte[] cidB = new byte[1];
+            byte[] vidB = new byte[1];
+            byte[] pidB = new byte[1];
+            int start = 0;
+            System.arraycopy(data, start, cidB, 0, cidB.length);
+            start += 1;
+            System.arraycopy(data, start, vidB, 0, vidB.length);
+            start += 1;
+            System.arraycopy(data, start, pidB, 0, pidB.length);
+            start += 1;
+            //特殊广播,包含是否可以绑定的标志
+            int cid = (cidB[0] & 0xff);
+            int vid = (vidB[0] & 0xff);
+            int pid = (pidB[0] & 0xff);
+            byte[] decryptData=new byte[10];//根据协议取出需要解密的广播数据
+            mAnalyticalDataUtil.decryptBroadcast(cid, vid, pid, decryptData);
+
+    }
+
+
     /**
      * 搜索到的数据到列表
      */