/*
 *  This sketch sends random data over UDP on a ESP32 device
 *
 */
#include <WiFi.h>
#include <WiFiUdp.h>
#define id 4


// WiFi network name and password:
const char * networkName = "Musica_para_electroimanes";
const char * networkPswd = "magnetic";

//const char * networkName = "HANGAR_convidats";
//const char * networkPswd = "convidatsHANGAR";

//IP address to send UDP data to:
// either use the ip address of the server or 
// a network broadcast address
const char * udpAddress = "192.168.4.255";

//const char * udpAddress = "172.24.7.106";

unsigned int  udpPort[7] = { 2345, 2346, 2347, 2348, 2349, 2350, 2351 };      // TO SET SENDING PORT PLAYER

//Are we currently connected?
boolean connected = false;

//The udp library class
WiFiUDP udp;

void setup(){
  // Initilize hardware serial:
  Serial.begin(2000000);
  pinMode(13, OUTPUT);
  digitalWrite(13, LOW);
  //Connect to the WiFi network
  connectToWiFi(networkName, networkPswd);
}

char buffer[2] = "0";

unsigned long time_off  = millis();
boolean state = false;

void on_solenoide()
  {
    //Serial.println("Hola");
    time_off = millis();
    state = true;
    digitalWrite(13, HIGH);
  }

void off_solenoide()
  {
    //Serial.println("adios");
    state = false;
    digitalWrite(13, LOW);
  }
  
void loop(){
  if (((millis()-time_off)>50)&&(state==true)) off_solenoide();
  
  memset(buffer, 0, 1);
  udp.parsePacket();
  if(udp.read(buffer, 1) > 0){
    if (buffer[0]=='1') on_solenoide();
   }
}

void connectToWiFi(const char * ssid, const char * pwd){
  Serial.println("Connecting to WiFi network: " + String(ssid));

  // delete old config
  WiFi.disconnect(true);
  //register event handler
  WiFi.onEvent(WiFiEvent);
  
  //Initiate connection
  WiFi.begin(ssid, pwd);

  Serial.println("Waiting for WIFI connection...");
}

//wifi event handler
void WiFiEvent(WiFiEvent_t event){
    switch(event) {
      case SYSTEM_EVENT_STA_GOT_IP:
          //When connected set 
          Serial.print("WiFi connected! IP address: ");
          Serial.println(WiFi.localIP());  
          //initializes the UDP state
          //This initializes the transfer buffer
          udp.begin(WiFi.localIP(),udpPort[id]);
          connected = true;
          break;
      case SYSTEM_EVENT_STA_DISCONNECTED:
          Serial.println("WiFi lost connection");
          connected = false;
          break;
    }
}