AsyncUDPServer.ino

/****************************************************************************************************************************
  Async_UdpServer.ino

  AsyncUDP_ESP32_SC_W5500 is a Async UDP library for the ESP32_SC_W5500 (ESP32S2/S3/C3 + LwIP W5500)

  Based on and modified from ESPAsyncUDP Library (https://github.com/me-no-dev/ESPAsyncUDP)
  Built by Khoi Hoang https://github.com/khoih-prog/AsyncUDP_ESP32_SC_W5500
  Licensed under GPLv3 license
 *****************************************************************************************************************************/

#if !( defined(ESP32) )
  #error This code is designed for (ESP32S2/S3/C3 + LwIP W5500) to run on ESP32 platform! Please check your Tools->Board setting.
#endif

#include <Arduino.h>

#define ASYNC_UDP_ESP32_SC_W5500_DEBUG_PORT      Serial

// Use from 0 to 4. Higher number, more debugging messages and memory usage.
#define _ASYNC_UDP_ESP32_SC_W5500_LOGLEVEL_      2

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

// For ESP32-S3
// 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           13
//#define MOSI_GPIO           11
//#define SCK_GPIO            12
//#define CS_GPIO             10

// For ESP32_C3
// Optional values to override default settings
// Don't change unless you know what you're doing
//#define ETH_SPI_HOST        SPI2_HOST
//#define SPI_CLOCK_MHZ       25

// Must connect INT to GPIOxx or not working
//#define INT_GPIO            10

//#define MISO_GPIO           5
//#define MOSI_GPIO           6
//#define SCK_GPIO            4
//#define CS_GPIO             7

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

#include <AsyncUDP_ESP32_SC_W5500.h>

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

// 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);

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

AsyncUDP udp;

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

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

  delay(500);

  Serial.print(F("\nStart Async_UdpServer on "));
  Serial.print(ARDUINO_BOARD);
  Serial.print(F(" with "));
  Serial.println(SHIELD_TYPE);
  Serial.println(WEBSERVER_ESP32_SC_W5500_VERSION);
  Serial.println(ASYNC_UDP_ESP32_SC_W5500_VERSION);

  Serial.setDebugOutput(true);

  UDP_LOGWARN(F("Default SPI pinout:"));
  UDP_LOGWARN1(F("SPI_HOST:"), ETH_SPI_HOST);
  UDP_LOGWARN1(F("MOSI:"), MOSI_GPIO);
  UDP_LOGWARN1(F("MISO:"), MISO_GPIO);
  UDP_LOGWARN1(F("SCK:"),  SCK_GPIO);
  UDP_LOGWARN1(F("CS:"),   CS_GPIO);
  UDP_LOGWARN1(F("INT:"),  INT_GPIO);
  UDP_LOGWARN1(F("SPI Clock (MHz):"), SPI_CLOCK_MHZ);
  UDP_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
  uint16_t index = millis() % NUMBER_OF_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 *W5500_Mac = W5500_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[index] );

  // 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();

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

  // Client address
  Serial.print("AsyncUDPServer started @ IP address: ");
  Serial.println(ETH.localIP());

  if (udp.listen(1234))
  {
    Serial.print("UDP Listening on IP: ");
    Serial.println(ETH.localIP());

    udp.onPacket([](AsyncUDPPacket packet)
    {
      Serial.print("UDP Packet Type: ");
      Serial.print(packet.isBroadcast() ? "Broadcast" : packet.isMulticast() ? "Multicast" : "Unicast");
      Serial.print(", From: ");
      Serial.print(packet.remoteIP());
      Serial.print(":");
      Serial.print(packet.remotePort());
      Serial.print(", To: ");
      Serial.print(packet.localIP());
      Serial.print(":");
      Serial.print(packet.localPort());
      Serial.print(", Length: ");
      Serial.print(packet.length());
      Serial.print(", Data: ");
      Serial.write(packet.data(), packet.length());
      Serial.println();
      //reply to the client
      packet.printf("Got %u bytes of data", packet.length());
    });
  }
}

void loop()
{
  delay(1000);
  //Send broadcast
  udp.broadcast("Anyone here?");
}