Network Communication rev_04

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    - Project: Network Communication
    - Source Code compiled for: Arduino Nano 33 BLE
    - Source Code created on: 2025-06-20 07:57:53

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Detect and initialize the Ethernet connection */
    /* using the Ethernet2 library and the W5500 module. */
    /* Retrieve and display the assigned IP address to */
    /* confirm successful connection. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <SPI.h>
#include <Ethernet2.h> //https://github.com/adafruit/Ethernet2

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs(void);

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t ethernet_W5500_RST_PIN_D2 = 2;

/***** DEFINITION OF SPI PINS *****/
const uint8_t ethernet_W5500_SPI_PIN_MOSI_D11 = 11;
const uint8_t ethernet_W5500_SPI_PIN_MISO_D12 = 12;
const uint8_t ethernet_W5500_SPI_PIN_SCLK_D13 = 13;
const uint8_t ethernet_W5500_SPI_PIN_CS_D10 = 10;

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
/***** used to store raw data *****/
bool ethernet_W5500_RST_PIN_D2_rawData = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
/***** used to store data after characteristic curve transformation *****/
float ethernet_W5500_RST_PIN_D2_phyData = 0.0;

/****** Ethernet connection variables *****/
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; // MAC address
IPAddress ip(192, 168, 0, 177); // Static IP address
const char* server = "www.google.com"; // Server to connect
EthernetClient client;

void setup(void)
{
  // Initialize serial communication for debugging
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }

  // Initialize the Ethernet reset pin
  pinMode(ethernet_W5500_RST_PIN_D2, OUTPUT);
  digitalWrite(ethernet_W5500_RST_PIN_D2, HIGH); // Keep W5500 out of reset

  // Initialize SPI pins
  pinMode(ethernet_W5500_SPI_PIN_CS_D10, OUTPUT);
  SPI.begin();

  // Detect and initialize Ethernet connection
  Serial.println("Initializing Ethernet...");
  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    Serial.println("Trying static IP...");
    Ethernet.begin(mac, ip);
  }
  delay(1000); // Allow Ethernet hardware to initialize

  // Retrieve and display the assigned IP address
  IPAddress localIP = Ethernet.localIP();
  Serial.print("Ethernet IP Address: ");
  Serial.println(localIP);
}

void loop(void)
{
  // put your main code here, to run repeatedly:
  updateOutputs();

  // Optional: Add code to check connection or send data
  // For demonstration, attempt to connect to server periodically
  static unsigned long lastAttempt = 0;
  if (millis() - lastAttempt > 10000) { // every 10 seconds
    lastAttempt = millis();
    Serial.println("Connecting to server...");
    if (client.connect(server, 80)) {
      Serial.println("Connected to server");
      client.println("GET / HTTP/1.1");
      client.println("Host: www.google.com");
      client.println("Connection: close");
      client.println();
    } else {
      Serial.println("Connection to server failed");
    }
  }

  // Read server response
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }

  // Check if server disconnected
  if (!client.connected()) {
    Serial.println();
    Serial.println("Disconnecting.");
    client.stop();
  }
}

void updateOutputs()
{
  digitalWrite(ethernet_W5500_RST_PIN_D2, ethernet_W5500_RST_PIN_D2_rawData);
}

/* END CODE */