diff --git a/src/iflytop/components/zcanreceiver/zcanreceiverhost.hpp b/src/iflytop/components/zcanreceiver/zcanreceiverhost.hpp
index 886d2c4..a41b1f2 100644
--- a/src/iflytop/components/zcanreceiver/zcanreceiverhost.hpp
+++ b/src/iflytop/components/zcanreceiver/zcanreceiverhost.hpp
@@ -16,6 +16,7 @@ namespace iflytop {
 
 using namespace std;
 using namespace zcr;
+using namespace core;
 
 class ZCanReceiverCMD {
  public:
@@ -24,6 +25,8 @@ class ZCanReceiverCMD {
   uint8_t  subcmdid;
   uint8_t  data[255 * 8];
   size_t   len;
+
+  string toString() { return fmt::format("{}-{}:{} {}", packetindex, cmdid, subcmdid, StringUtils().bytesToString(data, len)); }
 };
 
 class ZCanReceiverHost {
diff --git a/src/iflytop/core/core.hpp b/src/iflytop/core/core.hpp
index 18dbef5..ab3da2b 100644
--- a/src/iflytop/core/core.hpp
+++ b/src/iflytop/core/core.hpp
@@ -4,4 +4,5 @@
 #include "iflytop/core/components/timeutils.hpp"
 #include "iflytop/core/error/error_code.hpp"
 #include "iflytop/core/spdlogfactory/logger.hpp"
-#include "iflytop/core/thread/thread.hpp"
\ No newline at end of file
+#include "iflytop/core/thread/thread.hpp"
+#include "iflytop/core/components/stringutils.hpp"