diff --git a/appsrc/appcomponents/canchannel/com/zscanprotocol_com.cpp b/appsrc/appcomponents/canchannel/com/zscanprotocol_com.cpp
index b3aa0c9..9b3aac2 100644
--- a/appsrc/appcomponents/canchannel/com/zscanprotocol_com.cpp
+++ b/appsrc/appcomponents/canchannel/com/zscanprotocol_com.cpp
@@ -124,9 +124,11 @@ shared_ptr<Receipt> ZSCanProtocolCom::callcmd(int32_t to, int32_t cmdid, uint8_t
     } catch (const appexception &e) {
       if (e.ecode == kerr_overtime) {
         if (i != 0) {
-          logger->warn("tx [to:{}, cmd:{}, param:{}({}) ] overtime, try again %d", to, cmdid, StringUtils().bytesToString((uint8_t *)param, paramLen), paramLen, i);
+          logger->warn("tx [to:{}, cmd:{}, param:{}({}) ] overtime, try again {}", to, cmdid, StringUtils().bytesToString((uint8_t *)param, paramLen), paramLen, i);
         }
+        logger->warn("systemctl restart iflytoptdcan.service");
         system("systemctl restart iflytoptdcan.service");
+        usleep(300 * 1000);
         continue;
       } else if (e.ecode == kerr_subdevice_overtime) {
         if (i != 0) {