It's the firebase API template in Nodejs server side, and also continuous sending iot sensor data to the firebase.

nodejs_firebase_iot_send_data.js

/*
 * author : jiankaiwang
 * platform : nodejs
 * feature : the firebase API template in NodeJS server side
 * description : continuously send iot sensor data to the firebase
 */
var firebase = require("firebase");

function get_time(type) {
    function __formatMDHMS(getValue) {
        return (getValue < 10 ? '0' + getValue : getValue);
    }
    var varTime = new Date(),
        varYears = varTime.getFullYear(),
        varMonths = varTime.getMonth()+1,
        varDate = varTime.getDate(),
        varHours = varTime.getHours(),
        varMinutes = varTime.getMinutes(),
        varSeconds = varTime.getSeconds();
    switch(type) {
        case "Y":
            return(varYears);
        case "M":
            return(__formatMDHMS(varMonths));
        case "D":
            return(__formatMDHMS(varDate));
        case "h":
            return(__formatMDHMS(varHours));
        case "m":
            return(__formatMDHMS(varMinutes));
        case "s":
            return(__formatMDHMS(varSeconds));
        case "YMD":
            return(varYears + "/" + __formatMDHMS(varMonths) + "/" + __formatMDHMS(varDate));
        case "hm":
            return(__formatMDHMS(varHours) + "/" + __formatMDHMS(varMinutes));
        case "hms":
            return(__formatMDHMS(varHours) + ":" + __formatMDHMS(varMinutes) + ":" + __formatMDHMS(varSeconds));
    }
}

var config = {
    apiKey : "",
    authDomain : "",
    databaseURL : "https://(xxx).firebaseio.com/",
    storageBucket : ""
}
firebase.initializeApp(config);
var db = firebase.database();
var deviceID = "dev1";

setInterval(function(){ 
    var ref = db.ref("/cluster1/" + deviceID + "/" + get_time("YMD") + "/" + get_time("h"));
    var value = {
        humi: "28",
        temp: "26",
        time: get_time("hms")
    }
    ref.set(value);
}, 10000);