const express = require('express');
const http = require('http');
const app = express();
const path = require('path');
const server = http.createServer(app); //cria o servidor socket
const io = require('socket.io')(server);
io.on('connection', socket => {
 console.log('Usuário conectado:[ID]', socket.id); //mostra no servidor quando um usuário se conecta e informa o id dele
 socket.on('sendMessage', data => {
 console.log('Message received: ' + data)
 // socket.broadcast.emit('receivedMessage', data) //Envia a mensagem para todos conectados na aplicação
 });
});
server.listen(5000, () => { //configuração da porta 
 console.log('Servidor online! porta 5000');
});

#include <Arduino.h>
#include <WiFi.h>
#include <ArduinoJson.h>
#include <WebSocketsClient.h>
#include <SocketIOclient.h>
//#include <Hash.h>
const char* ssid = "Acerte o nome do Ratico";
const char* password = "HichiKko S2";
SocketIOclient socketIO;
void hexdump(const void *mem, uint32_t len, uint8_t cols = 16) {
 const uint8_t* src = (const uint8_t*) mem;
 Serial.printf("\n[HEXDUMP] Address: 0x%08X len: 0x%X (%d)", (ptrdiff_t)src, len, len);
 for (uint32_t i = 0; i < len; i++) {
 if (i % cols == 0) {
 Serial.printf("\n[0x%08X] 0x%08X: ", (ptrdiff_t)src, i);
 }
 Serial.printf("%02X ", *src);
 src++;
 }
 Serial.printf("\n");
}
void socketIOEvent(socketIOmessageType_t type, uint8_t * payload, size_t length) {
 switch (type) {
 case sIOtype_DISCONNECT:
 Serial.printf("[IOc] Disconnected!\n");
 break;
 case sIOtype_CONNECT:
 Serial.printf("[IOc] Connected to url: %s\n", payload);
 // join default namespace (no auto join in Socket.IO V3)
 socketIO.send(sIOtype_CONNECT, "/");
 break;
 case sIOtype_EVENT:
 Serial.printf("[IOc] get event: %s\n", payload);
 break;
 case sIOtype_ACK:
 Serial.printf("[IOc] get ack: %u\n", length);
 hexdump(payload, length);
 break;
 case sIOtype_ERROR:
 Serial.printf("[IOc] get error: %u\n", length);
 hexdump(payload, length);
 break;
 case sIOtype_BINARY_EVENT:
 Serial.printf("[IOc] get binary: %u\n", length);
 hexdump(payload, length);
 break;
 case sIOtype_BINARY_ACK:
 Serial.printf("[IOc] get binary ack: %u\n", length);
 hexdump(payload, length);
 break;
 }
}
void setup() {
 Serial.begin(115200);
 WiFi.begin(ssid, password);
 while (WiFi.status() != WL_CONNECTED) {
 delay(500);
 Serial.print(".");
 }
 Serial.println("");
 Serial.println("WiFi connected");
 Serial.print("IP address: ");
 Serial.println(WiFi.localIP());
 delay(5000);
 Serial.setDebugOutput(true);
 Serial.println();
 Serial.println();
 Serial.println();
 // server address, port and URL
 socketIO.begin("192.168.0.101", 5000, "/");
 // event handler
 socketIO.onEvent(socketIOEvent);
}
unsigned long messageTimestamp = 0;
void loop() {
 socketIO.loop();
}