diff --git a/esp3d/config.h b/esp3d/config.h
index d070be08..cea8f62f 100644
--- a/esp3d/config.h
+++ b/esp3d/config.h
@@ -19,7 +19,7 @@
 */
 
 //version and sources location
-#define FW_VERSION "2.1.1.b2"
+#define FW_VERSION "2.1.1.b3"
 #define REPOSITORY "https://github.com/luc-github/ESP3D"
 
 //Customize ESP3D ////////////////////////////////////////////////////////////////////////
diff --git a/esp3d/espcom.cpp b/esp3d/espcom.cpp
index f85ce868..22803845 100644
--- a/esp3d/espcom.cpp
+++ b/esp3d/espcom.cpp
@@ -69,7 +69,7 @@ long ESPCOM::readBytes (tpipe output, uint8_t * sbuf, size_t len)
         long l = Serial.readBytes(sbuf,len);
 #ifdef DEBUG_OUTPUT_SOCKET
         if(socket_server){
-            socket_server->sendBIN(ESPCOM::current_socket_id,sbuf,len);
+            socket_server->sendBIN(ESPCOM::current_socket_id,sbuf,l);
             }
 #endif
         return l;