diff --git a/src/main/java/com/iflytop/gd/infrastructure/drivers/PacketFactory.java b/src/main/java/com/iflytop/gd/infrastructure/drivers/PacketFactory.java
deleted file mode 100644
index a7374ed..0000000
--- a/src/main/java/com/iflytop/gd/infrastructure/drivers/PacketFactory.java
+++ /dev/null
@@ -1,6 +0,0 @@
-package com.iflytop.gd.infrastructure.drivers;
-
-public class PacketFactory {
-
-
-}
diff --git a/src/main/java/com/iflytop/gd/infrastructure/drivers/WebSocketCommandBusImpl.java b/src/main/java/com/iflytop/gd/infrastructure/drivers/WebSocketCommandBusImpl.java
index d893219..000101e 100644
--- a/src/main/java/com/iflytop/gd/infrastructure/drivers/WebSocketCommandBusImpl.java
+++ b/src/main/java/com/iflytop/gd/infrastructure/drivers/WebSocketCommandBusImpl.java
@@ -31,6 +31,7 @@ public class WebSocketCommandBusImpl implements CommandBus {
     private WebSocketClient webSocketClient;
     private CountDownLatch countDownLatch;
     private DataPacket lastDataPacket;
+    private Integer packetIndex = 0;
 
     public static final int PACKET_TYPE_CMD       = 0xA0;
     public static final int PACKET_TYPE_ACK       = 0xA1;
@@ -48,6 +49,11 @@ public class WebSocketCommandBusImpl implements CommandBus {
     public synchronized DataPacket waitForCommandExec(DataPacket commandPacket, Integer timeout, TimeUnit unit)
             throws CommandExecTimeoutException, HardwareErrorException, IOException, InterruptedException {
         try {
+            packetIndex = packetIndex + 1;
+            if (packetIndex > 30000) {
+                packetIndex = 1;
+            }
+            commandPacket.setPacketIndex(packetIndex);
             this.countDownLatch = new CountDownLatch(1);
             this.session.getBasicRemote().sendText(commandPacket.toByteString());
             boolean isTimeout = this.countDownLatch.await(timeout, unit);
@@ -57,7 +63,7 @@ public class WebSocketCommandBusImpl implements CommandBus {
                         commandPacket.getModuleId(), commandPacket.getCmdId(), unit.toMillis(timeout));
                 throw new CommandExecTimeoutException();
             }
-
+            log.debug("收到数据包{}", this.lastDataPacket);
             // 在指定的时间内得到了响应
             if (this.lastDataPacket.getPacketType() == PACKET_TYPE_ERROR_ACK) {
                 log.error("moduleId={}执行command={}发送硬件错误", this.lastDataPacket.getModuleId(), this.lastDataPacket.getCmdId());
diff --git a/src/main/java/com/iflytop/gd/system/models/DataPacket.java b/src/main/java/com/iflytop/gd/system/models/DataPacket.java
index e72ac3d..5997a59 100644
--- a/src/main/java/com/iflytop/gd/system/models/DataPacket.java
+++ b/src/main/java/com/iflytop/gd/system/models/DataPacket.java
@@ -65,6 +65,20 @@ public class DataPacket {
         return ByteArray.readU16bit(raw, INDEX_OFFSET);
     }
 
+    public void setPacketIndex(int packetIndex) {
+        ByteArray.setU16bit(raw, INDEX_OFFSET, packetIndex);
+        int checkSum = computeCheckSum();
+        ByteArray.setU8(raw, raw.length - 1, checkSum);
+    }
+
+    public int computeCheckSum() {
+        int checkcode = 0;
+        for (int i = 0; i < raw.length - 1; i++) {
+            checkcode += raw[i];
+        }
+        return checkcode & 0xFF;
+    }
+
     public int getCmdId() {
         return ByteArray.readU16bit(raw, CMDID_OFFSET);
     }