First stable compilation with ModbusRTU and ModbusTCP

lib/Core/core.h

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+/**
+ * @file core.h
+ * @brief Core constants and definitions for the Industrial Emulator project.
+ * @author Emmanuel Hernandez Cruz
+ * @date 2025-09-06
+ *
+ * This file contains shared constants, enumerations, and definitions that are
+ * used across both the main application firmware and the Core library.
+ * Placing these in a central, shared header prevents duplication and makes
+ * configuration easier.
+ * @note This file is intended to be included in the main `.ino` file.
+ */
+#ifndef CORE_H
+#define CORE_H
+#include "Equipment/Equipment.h"
+
+// Include the appropriate Modbus library header based on the build flag.
+// Define USE_MODBUS_IP in your build flags (e.g., platformio.ini) for Modbus IP.
+// Otherwise, it will default to Modbus RTU.
+#if defined(USE_MODBUS_IP)
+#include <ModbusIP_ESP8266.h> // Or your specific Modbus IP library
+#else
+#include <ModbusRTU.h>        // Or your specific Modbus RTU library
+#endif
+
+const int COIL = 0;         /**< @brief 0x: R/W Coil */
+const int DI = 1;           /**< @brief 1x: R Discrete Inputs */
+const int IR = 3;           /**< @brief 3x: R Input Register - Single word */
+const int IR_10X = 31;      /**< @brief 3x: R Input Register - Single word, 10x scaled */
+const int IR_LONG = 32;     /**< @brief 3x: R Input Register - Double word, Long type */
+const int IR_FLOAT = 33;    /**< @brief 3x: R Input Register - Double word, Float encoding */
+const int HR = 4;           /**< @brief 4x: R/W Holding Register - Single word */
+const int HR_10x = 41;      /**< @brief 4x: R/W Holding Register - Single word, 10x scaled */
+const int HR_LONG = 42;     /**< @brief 4x: R/W Holding Register - Double word, Long type */
+const int HR_FLOAT = 43;    /**< @brief 4x: R/W Holding Register - Double word, Float encoding */
+
+/**
+ * @struct modbusMap
+ * @brief Defines the structure for a single entry in the Modbus map.
+ */
+struct modbusMap
+{
+  int   category;       /**< @brief The Modbus category (e.g., COIL, HR, IR_FLOAT). */
+  int   address;        /**< @brief The Modbus address (0-9999). */
+  int   value;          /**< @brief The initial value for the point. */
+  char  description[35];/**< @brief A descriptive name for the point. Used as a key for access. */
+};
+
+/**
+ * @brief The main loop previous milliseconds.
+ */
+unsigned long previousMillis = 0;
+
+/**
+ * @brief Global Modbus object instance.
+ * The type is determined at compile time based on the USE_MODBUS_IP flag.
+ */
+#if defined(USE_MODBUS_IP)
+extern ModbusIP mb; // Use ModbusIP class
+/** @brief An instance of the Equipment class, representing the emulated Equipment unit. */
+Equipment<ModbusIP> EquipmentInstance(&mb);
+#else
+extern ModbusRTU mb; // Use ModbusRTU class
+/** @brief An instance of the Equipment class, representing the emulated Equipment unit. */
+Equipment<ModbusRTU> EquipmentInstance(&mb);
+#endif
+
+
+#endif // CORE_H