rearrange code

use generic ESP3D define instead of Marlin ones
move configuration define in esp3dconfiglib
move output to  espcom
remove ARDUINO_ARCH_ESP32 as not necessary
make constistent initialization messages

src/espcom.cpp

@@ -0,0 +1,36 @@
+/*
+  espcom.cpp - esp3d communication serial/tcp/etc.. class
+
+  Copyright (c) 2014 Luc Lebosse. All rights reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include "esp3dlibconfig.h"
+
+#if defined(ESP3D_WIFISUPPORT)
+
+#include MARLIN_PATH(HAL/HAL_ESP32/FlushableHardwareSerial.h)
+#include MARLIN_PATH(HAL/HAL_ESP32/HAL.h)
+#include "espcom.h"
+
+void Esp3DCom::echo(const char * data)
+{
+	SERIAL_ECHO_START();
+	SERIAL_ECHOLNPAIR("", data);
+}
+
+
+#endif //ESP3D_WIFISUPPORT