ModbusEthernet: ESP32 fix

Author: emelianov

src/ModbusEthernet.h

@@ -13,6 +13,9 @@
 #if defined(ARDUINO_PORTENTA_H7_M4) || defined(ARDUINO_PORTENTA_H7_M7) || defined(ARDUINO_PORTENTA_X8)
 #define MODBUS_ETH_WRAP_ACCEPT
 #undef MODBUS_ETH_WRAP_BEGIN
+#elif defined(ESP32)
+#undef MODBUS_ETH_WRAP_ACCEPT
+#define MODBUS_ETH_WRAP_BEGIN
 #else
 #undef MODBUS_ETH_WRAP_ACCEPT
 #undef MODBUS_ETH_WRAP_BEGIN
@@ -25,7 +28,7 @@ class EthernetServerWrapper : public EthernetServer {
     }
 #if defined(MODBUS_ETH_WRAP_BEGIN)
     void begin(uint16_t port=0) {
-
+        EthernetServer::begin();
     }
 #endif
 #if defined(MODBUS_ETH_WRAP_ACCEPT)