esp8266-wol.ino

#include <ESP8266WiFi.h>
#include <WiFiUdp.h>

const char* ssid = "";
const char* password = "";

WiFiUDP Udp;
WiFiUDP Udp2;
WiFiUDP Udp3;
WiFiUDP Udp4;

char incomingPacket[255];  // buffer for incoming packets
const char wol[] {};

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

  Serial.printf("Connecting to %s ", ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }
  Serial.println(" connected");

  Udp.begin(9);
  Udp2.begin(7);
  Udp3.begin(0);
  Udp4.begin(5600);
  Serial.printf("Now listening at IP %s, UDP port %d\n", WiFi.localIP().toString().c_str(), 79);
  pinMode(D0,OUTPUT);
  digitalWrite(D0, HIGH);
}


void loop()
{
  checkPacket(Udp);
  checkPacket(Udp2);
  checkPacket(Udp3);
  checkPacket(Udp4);
  delay(10);
}

void checkPacket(WiFiUDP Listener){
  int packetSize = Listener.parsePacket();
  if (packetSize)
  {
    // receive incoming UDP packets
    Serial.printf("Received %d bytes from %s, port %d\n", packetSize, Listener.remoteIP().toString().c_str(), Listener.remotePort());
    int len = Listener.read(incomingPacket, 255);
    if (len > 0)
    {
      incomingPacket[len] = 0;
      for(int x; x<len-6;x++){
        if (strncmp(incomingPacket+x, wol, 6) == 0){
          Serial.printf("Received WoL Packet");
          toggleThings();
          break;
        }
      }
    }
    Serial.printf("UDP packet contents: %s\n", incomingPacket);
  }
}

void toggleThings(){
  digitalWrite(D0, LOW);
  delay(100);
  digitalWrite(D0, HIGH);
}