WebServer.ino

/****************************************************************************************************************************
  WebServer.ino - Simple Arduino web server sample for Ethernet shield

  For Ethernet shields using ESP32_W5500 (ESP32 + W5500)

  WebServer_ESP32_W5500 is a library for the ESP32 with Ethernet W5500 to run WebServer

  Based on and modified from ESP32-IDF https://github.com/espressif/esp-idf
  Built by Khoi Hoang https://github.com/khoih-prog/WebServer_ESP32_W5500
  Licensed under GPLv3 license
 *****************************************************************************************************************************/

#if !( defined(ESP32) )
  #error This code is designed for (ESP32 + W5500) to run on ESP32 platform! Please check your Tools->Board setting.
#endif

#define DEBUG_ETHERNET_WEBSERVER_PORT       Serial

// Debug Level from 0 to 4
#define _ETHERNET_WEBSERVER_LOGLEVEL_       3

//////////////////////////////////////////////////////////

// Optional values to override default settings
// Don't change unless you know what you're doing
//#define ETH_SPI_HOST        SPI3_HOST
//#define SPI_CLOCK_MHZ       25

// Must connect INT to GPIOxx or not working
//#define INT_GPIO            4

//#define MISO_GPIO           19
//#define MOSI_GPIO           23
//#define SCK_GPIO            18
//#define CS_GPIO             5

//////////////////////////////////////////////////////////

#include <WebServer_ESP32_W5500.h>

WiFiServer server(80);

// Enter a MAC address and IP address for your controller below.
#define NUMBER_OF_MAC      20

byte mac[][NUMBER_OF_MAC] =
{
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x01 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x02 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x03 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x04 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x05 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x06 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x07 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x08 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x09 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0A },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0B },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0C },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0D },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0E },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0F },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x10 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x11 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x12 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x13 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x14 },
};

// Select the IP address according to your local network
IPAddress myIP(192, 168, 2, 232);
IPAddress myGW(192, 168, 2, 1);
IPAddress mySN(255, 255, 255, 0);

// Google DNS Server IP
IPAddress myDNS(8, 8, 8, 8);

int reqCount = 0;                // number of requests received

void setup()
{
  Serial.begin(115200);

  while (!Serial && (millis() < 5000));

  Serial.print(F("\nStart WebServer on "));
  Serial.print(ARDUINO_BOARD);
  Serial.print(F(" with "));
  Serial.println(SHIELD_TYPE);
  Serial.println(WEBSERVER_ESP32_W5500_VERSION);

  ET_LOGWARN(F("Default SPI pinout:"));
  ET_LOGWARN1(F("SPI_HOST:"), ETH_SPI_HOST);
  ET_LOGWARN1(F("MOSI:"), MOSI_GPIO);
  ET_LOGWARN1(F("MISO:"), MISO_GPIO);
  ET_LOGWARN1(F("SCK:"),  SCK_GPIO);
  ET_LOGWARN1(F("CS:"),   CS_GPIO);
  ET_LOGWARN1(F("INT:"),  INT_GPIO);
  ET_LOGWARN1(F("SPI Clock (MHz):"), SPI_CLOCK_MHZ);
  ET_LOGWARN(F("========================="));

  ///////////////////////////////////

  // To be called before ETH.begin()
  ESP32_W5500_onEvent();

  // start the ethernet connection and the server:
  // Use DHCP dynamic IP and random mac
  //bool begin(int MISO_GPIO, int MOSI_GPIO, int SCLK_GPIO, int CS_GPIO, int INT_GPIO, int SPI_CLOCK_MHZ,
  //           int SPI_HOST, uint8_t *W6100_Mac = W6100_Default_Mac);
  ETH.begin( MISO_GPIO, MOSI_GPIO, SCK_GPIO, CS_GPIO, INT_GPIO, SPI_CLOCK_MHZ, ETH_SPI_HOST );
  //ETH.begin( MISO_GPIO, MOSI_GPIO, SCK_GPIO, CS_GPIO, INT_GPIO, SPI_CLOCK_MHZ, ETH_SPI_HOST, mac[millis() % NUMBER_OF_MAC] );

  // Static IP, leave without this line to get IP via DHCP
  //bool config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns1 = 0, IPAddress dns2 = 0);
  //ETH.config(myIP, myGW, mySN, myDNS);

  ESP32_W5500_waitForConnect();

  ///////////////////////////////////

  // start the web server on port 80
  server.begin();
}

void loop()
{
  // listen for incoming clients
  WiFiClient client = server.available();

  if (client)
  {
    Serial.println(F("New client"));
    // an http request ends with a blank line
    bool currentLineIsBlank = true;

    while (client.connected())
    {
      if (client.available())
      {
        char c = client.read();
        Serial.write(c);

        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
        if (c == '\n' && currentLineIsBlank)
        {
          Serial.println(F("Sending response"));

          // send a standard http response header
          // use \r\n instead of many println statements to speedup data send
          client.print(
            "HTTP/1.1 200 OK\r\n"
            "Content-Type: text/html\r\n"
            "Connection: close\r\n"  // the connection will be closed after completion of the response
            "Refresh: 20\r\n"        // refresh the page automatically every 20 sec
            "\r\n");
          client.print("<!DOCTYPE HTML>\r\n");
          client.print("<html>\r\n");
          client.print(String("<h2>Hello World from ") + BOARD_NAME + "!</h2>\r\n");
          client.print("Requests received: ");
          client.print(++reqCount);
          client.print("<br>\r\n");
          client.print("<br>\r\n");
          client.print("</html>\r\n");
          break;
        }

        if (c == '\n')
        {
          // you're starting a new line
          currentLineIsBlank = true;
        }
        else if (c != '\r')
        {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }

    // give the web browser time to receive the data
    delay(10);

    // close the connection:
    client.stop();
    Serial.println(F("Client disconnected"));
  }
}