Node.js - 本地网络设备列表

可能的解决方案

var ping = require('ping');
var hosts = ['10.0.0.2','10.0.0.3']; <--- printer A and B addresses
hosts.forEach(function(host){
    ping.sys.probe(host, function(isAlive){
        var msg = isAlive ? 'host ' + host + ' is connected' : 'host ' + host + ' is not connected';
        console.log(msg);
    });
});