First stable compilation with ModbusRTU and ModbusTCP

lib/modbus-esp8266/ModbusIP_ESP8266.h

@@ -0,0 +1,11 @@
+/*
+    Modbus Library for Arduino
+    ModbusIP class compatibility wrapper
+    Copyright (C) 2014 Andr<64> Sarmento Barbosa
+                  2017-2020 Alexander Emelianov (a.m.emelianov@gmail.com)
+*/
+
+#pragma once
+#include "ModbusTCP.h"
+
+class ModbusIP : public ModbusTCP {};