diff --git a/buban104.cpp b/buban104.cpp
index caca5eb..84f55cc 100644
--- a/buban104.cpp
+++ b/buban104.cpp
@@ -187,6 +187,10 @@ void Buban104RecvData(int commid, u_char *buf, int len)// 
 		return;
 	
 	pPortParam = (pBUBAN104PORTPARAM)SioParam[commid].ExtInfo;
+	printf("recvbuf: ");
+	for (i = 0; i < len; i++)
+		printf("%02X ", buf[i]);
+	printf("\n");
 
 	for(i=0; i<len; i++)
 	{
diff --git a/netport.cpp b/netport.cpp
index 1c7e81c..8f25a12 100644
--- a/netport.cpp
+++ b/netport.cpp
@@ -583,7 +583,7 @@ BOOL TcpRecv(int commid, int fds, u_long ipaddr)
 
 void TcpSend(int commid)
 {
-	int		len, plen, slen;
+	int		len, plen, slen, i;
 
 	if(OPEN_PORT != SioParam[commid].OpenFlag)
 	{
@@ -614,6 +614,10 @@ void TcpSend(int commid)
 		len = send(SioParam[commid].CommSock,(const char*)&SioParam[commid].WriteData->MsgData[plen], slen, 0);
 		if(len > 0)
 		{
+			printf("TcpSend: ");
+			for (i = 0; i < len; i++)
+				printf("%02X ", SioParam[commid].WriteData->MsgData[plen + i]);
+			printf("\n");
 			if(len < slen)
 			{
 				if(EINPROGRESS != errno)