diff --git a/src/HTIEC104.cpp b/src/HTIEC104.cpp
index bf27993..519f4c3 100644
--- a/src/HTIEC104.cpp
+++ b/src/HTIEC104.cpp
@@ -3635,6 +3635,8 @@ void *thread_Timer_proc(void *arg)
                 {
                     g_Tcp.tcpCloseSocket(g_IecCtrl.sockid);
                     g_IecCtrl.isConnect = false;
+
+					vPrtLogMsg(LOG_DEBUG, 0, "Wait for U RESP timeout: TxCounter=%d LastAckTx=%d > 6, close the socket", g_IecCtrl.TxCounter, g_IecCtrl.LastAckTx);
                 }
                 // g_IecCtrl.timer_Confirmflag = true;
             }