set functionality based on Arduino board

Author: budulinek

arduino-modbus-rtu-tcp-gateway/advanced_settings.h

@@ -8,6 +8,12 @@
 
 // #define ENABLE_DHCP  // Enable DHCP (Auto IP settings), consumes a lot of FLASH memory
 
+#if defined(ARDUINO_AVR_UNO)
+#define ENABLE_EXTENDED_WEBUI
+#elif defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560)
+#define ENABLE_EXTENDED_WEBUI
+#define ENABLE_DHCP
+#endif
 
 /****** DEFAULT CONFIGURATION ******/
 /*

arduino-modbus-rtu-tcp-gateway/arduino-modbus-rtu-tcp-gateway.ino

@@ -23,6 +23,7 @@
   v7.0 2023-07-21 Manual MAC, better data types
   v7.1 2023-08-25 Simplify EEPROM read and write, Tools page
   v7.2 2023-10-20 Disable DHCP renewal fallback, better advanced_settings.h layout
+                  ENABLE_EXTENDED_WEBUI is set by default for Uno and Mega, ENABLE_DHCP is set by default for Mega
 */
 
 const byte VERSION[] = { 7, 2 };