diff --git a/platformio.ini b/platformio.ini
index 36618b9..37e482e 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -18,8 +18,8 @@ platform = espressif8266
 framework = arduino
 monitor_speed = 115200
 upload_speed = 115200
-upload_port = COM5
-monitor_port = COM5
+upload_port = COM6
+monitor_port = COM6
 board_build.flash_mode = dout
 build_flags =
     -Wno-unused-function
diff --git a/src/IRBabyIRIS.cpp b/src/IRBabyIRIS.cpp
index b4e9b9c..e1aaaf1 100644
--- a/src/IRBabyIRIS.cpp
+++ b/src/IRBabyIRIS.cpp
@@ -153,6 +153,10 @@ void sendIrisKitHeartBeat() {
     sendRawData(g_upstream_topic.c_str(), (uint8_t*) heartBeatMessage.c_str(), heartBeatMessage.length());
 }
 
+void handleIrisKitMessage(const char* data, int length) {
+
+}
+
 
 // private function definitions
 static String buildConnect() {
diff --git a/src/IRbaby.cpp b/src/IRbaby.cpp
index 477229d..366612f 100644
--- a/src/IRbaby.cpp
+++ b/src/IRbaby.cpp
@@ -145,7 +145,6 @@ void setup() {
     }
 
     // TODO: fix the logic without settings loaded
-
     INFOF("Wifi Connected, IRIS server = %s, credential token = %s\n",
           iris_server_address, iris_credential_token);
 
@@ -201,7 +200,6 @@ void factoryReset() {
     }
 }
 
-
 // private function defitions
 static void wifiReset() {
     DEBUGLN("Reset settings");
diff --git a/src/IRbabyAlink.cpp b/src/IRbabyAlink.cpp
index 1255624..3fa13c5 100644
--- a/src/IRbabyAlink.cpp
+++ b/src/IRbabyAlink.cpp
@@ -106,4 +106,7 @@ static void registerCallback(const char* topic, int qos) {
 
 static void irisAlinkCallback(const char *topic, uint8_t *data, int length) {
     INFOF("IRIS downstream message : topic = %s, length = %d, data = %s\n", topic, length, (char*) data);
+    if (NULL != g_downstream_topic.c_str() && 0 == strcmp(topic, g_downstream_topic.c_str())) {
+        handleIrisKitMessage((const char*) data, length);
+    }
 }
diff --git a/src/IRbabyIRIS.h b/src/IRbabyIRIS.h
index 7f5b5d3..9939711 100644
--- a/src/IRbabyIRIS.h
+++ b/src/IRbabyIRIS.h
@@ -51,4 +51,6 @@ void sendIrisKitConnect();
 
 void sendIrisKitHeartBeat();
 
+void handleIrisKitMessage(const char* data, int length);
+
 #endif // IRBABY_IRIS_H
\ No newline at end of file