diff --git a/src/asyncwebserver.cpp b/src/asyncwebserver.cpp
index 19432026..a9b28acc 100644
--- a/src/asyncwebserver.cpp
+++ b/src/asyncwebserver.cpp
@@ -57,6 +57,7 @@
 
 //embedded response file if no files on SPIFFS
 #include "nofile.h"
+bool can_process_serial = true;
 
 extern bool  deleteRecursive(String path);
 extern void CloseSerialUpload (bool iserror, String & filename);
@@ -707,6 +708,8 @@ void handle_web_command (AsyncWebServerRequest *request)
             LOG ("Start PurgeSerial\r\n")
             ESPCOM::processFromSerial (true);
             LOG ("End PurgeSerial\r\n")
+			can_process_serial = false;
+			request->onDisconnect([request](){can_process_serial = true;});
             //send command
             LOG ("Send Command\r\n")
             ESPCOM::println (cmd, DEFAULT_PRINTER_PIPE);
diff --git a/src/asyncwebserver.h b/src/asyncwebserver.h
index 6a7c7dcb..b4c4659a 100644
--- a/src/asyncwebserver.h
+++ b/src/asyncwebserver.h
@@ -34,6 +34,7 @@ extern void handle_serial_SDFileList (AsyncWebServerRequest *request);
 extern void SDFile_serial_upload (AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final);
 extern void handle_Websocket_Event(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len);
 extern void handle_onevent_connect(AsyncEventSourceClient *client);
+extern bool can_process_serial;
 
 #ifdef SSDP_FEATURE
 extern void handle_SSDP (AsyncWebServerRequest *request);
diff --git a/src/config.h b/src/config.h
index 6f984759..f1b62cfa 100644
--- a/src/config.h
+++ b/src/config.h
@@ -19,7 +19,7 @@
 */
 
 //version and sources location
-#define FW_VERSION "2.0.0.c14"
+#define FW_VERSION "2.0.0.c15"
 #define REPOSITORY "https://github.com/luc-github/ESP3D"
 
 //Customize ESP3D ////////////////////////////////////////////////////////////////////////
diff --git a/src/espcom.cpp b/src/espcom.cpp
index 5efe710a..f4f37a8c 100644
--- a/src/espcom.cpp
+++ b/src/espcom.cpp
@@ -44,6 +44,9 @@ bool ESPCOM::block_2_printer = false;
 
 void ESPCOM::bridge(bool async)
 {
+#if defined (ASYNCWEBSERVER)
+	if(can_process_serial) {
+#endif
 //be sure wifi is on to proceed wifi function
     if ((WiFi.getMode() != WIFI_OFF) || wifi_config.WiFi_on) {
 //read tcp port input
@@ -53,7 +56,11 @@ void ESPCOM::bridge(bool async)
     }
 //read serial input
 ESPCOM::processFromSerial();
+#if defined (ASYNCWEBSERVER)
+	}
+#endif
 }
+
 long ESPCOM::readBytes (tpipe output, uint8_t * sbuf, size_t len)
 {
 	 switch (output) {
@@ -339,7 +346,10 @@ bool ESPCOM::processFromSerial (bool async)
     //check UART for data
     if (ESPCOM::available(DEFAULT_PRINTER_PIPE)) {
         size_t len = ESPCOM::available(DEFAULT_PRINTER_PIPE);
-        uint8_t sbuf[len+1];
+       uint8_t * sbuf = (uint8_t *)malloc(len+1);
+        if(!sbuf){
+            return false;
+        }
         sbuf[len] = '\0';
         ESPCOM::readBytes (DEFAULT_PRINTER_PIPE, sbuf, len);
 #ifdef TCP_IP_DATA_FEATURE
@@ -366,6 +376,7 @@ bool ESPCOM::processFromSerial (bool async)
 #endif
         //process data if any
         COMMAND::read_buffer_serial (sbuf, len);
+        free(sbuf);
         return true;
     } else {
         return false;