diff --git a/esp3d/src/modules/mks/mks_service.cpp b/esp3d/src/modules/mks/mks_service.cpp
index 8a345194..246ccd07 100644
--- a/esp3d/src/modules/mks/mks_service.cpp
+++ b/esp3d/src/modules/mks/mks_service.cpp
@@ -408,7 +408,7 @@ void MKSService::messageWiFiControl(const uint8_t * dataFrame, const size_t data
         log_esp3d("WiFi control flag not supported");
     }
 }
-
+//Exception handle - but actually not used 
 void MKSService::messageException(const uint8_t * dataFrame, const size_t dataSize )
 {
     if(dataSize != 1) {
@@ -423,24 +423,6 @@ void MKSService::messageException(const uint8_t * dataFrame, const size_t dataSi
     }
 }
 
-bool MKSService::waitForAck()
-{
-    uint32_t timestart = millis();
-    bool res=true;
-    while ((_uploadStatus==UNKNOW_STATE)&&((millis()-timestart)<ACK_TIMEOUT)) {
-        serial_service.handle();
-        Hal::wait(10);
-    }
-    if (_uploadStatus!=SUCCESS_STATE) {
-        res=false;
-    }
-    if(_uploadStatus==UNKNOW_STATE) {
-        log_esp3d("Ack timeout");
-    }
-    _uploadStatus=UNKNOW_STATE;
-    return res;
-}
-
 void MKSService::messageWiFiConfig(const uint8_t * dataFrame, const size_t dataSize )
 {
     String ssid;
diff --git a/esp3d/src/modules/mks/mks_service.h b/esp3d/src/modules/mks/mks_service.h
index ac9570b1..55bc8c14 100644
--- a/esp3d/src/modules/mks/mks_service.h
+++ b/esp3d/src/modules/mks/mks_service.h
@@ -41,7 +41,6 @@ public:
     static bool isTail(const char c);
     static bool isFrame(const char c);
     static bool isCommand(const char c);
-    static bool waitForAck();
     static bool sendFirstFragment(const char* filename, size_t filesize);
     static bool sendFragment(const uint8_t * dataFrame, const size_t dataSize,uint fragmentID);
     static uint getFragmentID(uint32_t fragmentNumber, bool isLast=false);