client.js

//client.js
var io = require('socket.io-client');
var socket = io.connect('http://localhost:3000', {reconnect: true});

// Add a connect listener
socket.on('connect', function () {
    console.log('Connected!');
    socket.emit("test", {"data":"blob"});
});
socket.emit('CH01', 'me', 'test msg');