diff --git a/esp8285/src/emq_client.cpp b/esp8285/src/emq_client.cpp
index b819dd1..e6e1b12 100644
--- a/esp8285/src/emq_client.cpp
+++ b/esp8285/src/emq_client.cpp
@@ -75,11 +75,11 @@ int connectToEMQXBroker(PubSubClient &mqtt_client) {
     }
     if (emqx_client->connected()) {
         INFOF("IoT connect done\n");
-        return 0;
     } else {
         ERRORF("IoT failed to connect\n");
-        return -1;
+        ESP.restart();
     }
+        return 0;
 }
 
 void emqxClientKeepAlive(PubSubClient& mqtt_client) {
diff --git a/esp8285/src/serials.h b/esp8285/src/serials.h
index 467fcfb..3745d74 100644
--- a/esp8285/src/serials.h
+++ b/esp8285/src/serials.h
@@ -31,24 +31,24 @@
 // generic COM debug
 
 #define DEBUGLN(...) \
-    {if (LOG_DEBUG) { Serial.printf("DEBUG: "); Serial.println(__VA_ARGS__);}}
+    { if (LOG_DEBUG) { Serial.printf("DEBUG: "); Serial.println(__VA_ARGS__); } }
 #define DEBUGF(...) \
-    {if (LOG_DEBUG) { Serial.printf("DEBUG: "); Serial.printf(__VA_ARGS__); Serial.println();}}
+    { if (LOG_DEBUG) { Serial.printf("DEBUG: "); Serial.printf(__VA_ARGS__); } }
 #define DEBUG(...)  \
-    {if (LOG_DEBUG) { Serial.printf("DEBUG: "); Serial.print(__VA_ARGS__); Serial.println();}}
+    { if (LOG_DEBUG) { Serial.printf("DEBUG: "); Serial.print(__VA_ARGS__); } }
 
 #define INFOLN(...) \
-    {if (LOG_INFO) { Serial.printf("INFO: "); Serial.println(__VA_ARGS__);}}
+    { if (LOG_INFO) { Serial.printf("INFO: "); Serial.println(__VA_ARGS__); } }
 #define INFOF(...) \
-    {if (LOG_INFO) { Serial.printf("INFO: "); Serial.printf(__VA_ARGS__); Serial.println();}}
+    { if (LOG_INFO) { Serial.printf("INFO: "); Serial.printf(__VA_ARGS__); } }
 #define INFO(...)  \
-    {if (LOG_INFO) { Serial.printf("INFO: "); Serial.print(__VA_ARGS__); Serial.println();}}
+    { if (LOG_INFO) { Serial.printf("INFO: "); Serial.print(__VA_ARGS__); } }
 
 #define ERRORLN(...) \
-    {if (LOG_ERROR) { Serial.printf("ERROR: "); Serial.println(__VA_ARGS__);}}
+    { if (LOG_ERROR) { Serial.printf("ERROR: "); Serial.println(__VA_ARGS__); } }
 #define ERRORF(...) \
-    {if (LOG_ERROR) { Serial.printf("ERROR: "); Serial.printf(__VA_ARGS__); Serial.println();}}
+    { if (LOG_ERROR) { Serial.printf("ERROR: "); Serial.printf(__VA_ARGS__); } }
 #define ERROR(...)  \
-    {if (LOG_ERROR) { Serial.printf("ERROR: "); Serial.print(__VA_ARGS__); Serial.println();}}
+    { if (LOG_ERROR) { Serial.printf("ERROR: "); Serial.print(__VA_ARGS__); } }
 
 #endif // IRIS_KIT_SERIALS_H
\ No newline at end of file