AdMob not getting display on device ionic

i am trying to display admob inside my application but it's not getting displayed on screen.

I added its plugins :- cordova plugin add com.rjfun.cordova.plugin.admob cordova plugin add https://github.com/floatinghotpot/cordova-plugin-admob.git

here is my code which i have done in my app.js class under run function :-

$ionicPlatform
  .ready(function() {

      if (window.plugins && window.plugins.AdMob) {
        alert('inside');
        var admob_key = device.platform == "Android" ? "ca-app-pub-6869992474017983/4748283957" : "IOS_PUBLISHER_KEY";
        var admob = window.plugins.AdMob;
        admob
          .createBannerView({
              'adId': admob_key,
              'position': admob.AD_POSITION.BOTTOM_CENTER,
              'adSize': admob.AD_SIZE.BANNER,
              'bannerAtTop': false
            },
            function() {
              admob
                .requestAd({
                    'isTesting': false
                  },
                  function() {
                    admob
                      .showAd(true);
                  },
                  function() {
                    alert("failed to request ad");
                    console
                      .log('failed to request ad');
                  });
            },
            function() {
              alert("failed to create banner view");
              console
                .log('failed to create banner view');
            });
      } else {
        alert("AdMob plugin not available/ready.");
      }

links from which i refer above code :-

1) https://blog.nraboy.com/2014/06/using-admob-ionicframework/

2) https://github.com/floatinghotpot/cordova-admob-pro

Please provide me any suggestion on it.

Thanks

Some things have changed between the latest version of Admob and that in the blog by nraboy. I noticed the following differences a few weeks back when I used the plugin after I inspected the plugins .js file to figure out the changes:

Admob was no longer located under window.plugins.Admob I found it under window.Admob
Config option publisherId is now adId
Config option bannerAtTopis now position
admob.createBannerView() is now just admob.createBanner() which does all the work for you when it comes to showing the add (you don't need to call admob.requestAd()) etc.

Template to follow

           if (window.AdMob) {
                var admob = window.AdMob;
                admob.createBanner({
                    adId: admob_key,
                    adSize: admob.AD_SIZE.SMART_BANNER,
                    position: admob.AD_POSITION.BOTTOM_CENTER,
                    isTesting: false, //Live
                    //isTesting: true, //Test
                    autoShow: true
                }, function (data) {
                    console.log('Banner created... ' + angular.toJson(data));
                }, function (err) {
                    console.log('Failed to create banner view... ' + angular.toJson(err));
                });
            } else {
                //plugin not found
            }

Additional Info

In case you aren't aware of other AD_SIZE and AD_POSITION options (copied from the plugins .js file)

.AD_POSITION = {
  NO_CHANGE: 0,
  TOP_LEFT: 1,
  TOP_CENTER: 2,
  TOP_RIGHT: 3,
  LEFT: 4,
  CENTER: 5,
  RIGHT: 6,
  BOTTOM_LEFT: 7,
  BOTTOM_CENTER: 8,
  BOTTOM_RIGHT: 9,
  POS_XY: 10
};

.AD_SIZE = {
  SMART_BANNER: 'SMART_BANNER',
  BANNER: 'BANNER',
  MEDIUM_RECTANGLE: 'MEDIUM_RECTANGLE',
  FULL_BANNER: 'FULL_BANNER',
  LEADERBOARD: 'LEADERBOARD',
  SKYSCRAPER: 'SKYSCRAPER'
};