// npm install node-gcm
var gcm = require('node-gcm');

var gcm_server_key = '';
var sender = new gcm.Sender(gcm_server_key);
 
var message = new gcm.Message({
collapseKey: 'demo',
ontentAvailable: true,
priority: 'high',
    restrictedPackageName: "com.kg.push",
    delayWhileIdle: true,
    timeToLive: 3,
//dryRun: true,
    notification: {
        title: "시간알림",
        icon: "ic_launcher",
        body: "10분남았습니다."
    },
    data: {
        key1: 'message1',
        key2: 'message2'
    }
});
 

var regTokens = [''];

sender.send(message, { registrationTokens: regTokens }, function (err, response) {
    if (err) console.error(err);
    else console.log(response);
});