Marketing Cloud push notification not working - ID check

Question

I'm using MobilePush in Marketing Cloud to send push notifications to my Android phone and it's not working!

It seems like there are IDs everywhere along the road. Can someone please help me figure out what needs to go where?

First, Android Java code, on init of MarketingCloudSdk you need to send some IDs:

MarketingCloudSdk.init(this, MarketingCloudConfig.builder()
            .setApplicationId("801a9061-f48a-4053-b838-9962d6aeef2e")
            .setAccessToken("535gar5272p4um77cjw5xvyy")
            .setGcmSenderId("701243172379")
            //Enable any other feature desired.
            .build()

• ApplicationId - what is this? I've guessed it's the application ID of my "MobilePush" type app in the App Center??
• AccessToken - what is this? Again, I've guessed it's the access token of my "MobilePush" type app in the App Center??
• GcmSenderId - what is this?? I've guessed it's the "senderId" of my app in Google FCM, under Settings > Cloud Messaging > Sender Id?

Next, using MobilePush Marketing Cloud, when you add a contact, you need to provide the following 4 mandatory things:

• AppId - What is this? I've guessed it's the application ID of my "MobilePush" type app in the App Center??
• DeviceId - What is this? I've guessed it's the deviceId that FCM generates when you call FirebaseInstanceId.getInstance().getToken() in your Android Java code?
• SystemToken - No idea what this is or how to get it!!
• SubscriberKey - No idea what this is or how to get it!!

Any help on trying to put these pieces of the puzzle together is much appreciated!

I have got some of my assumptions wrong above I am sure. Help me, please!

Answer 1

First, your "send some IDs" guesses were correct. Details can be found Create a MobilePush App in the App Center and Provision App: Retrieve Key and ID in Google Firebase.

Are you manually trying to use the Marketing Cloud APIs? The SDK will handle registering your contact with the Marketing Cloud servers once the device has received a Push Token from Google. Optionally, you can set a unique identifier for the contact using the setContactKey() method.

If you're using the SDK, here are some helpful troubleshooting steps, but from your description, and the most common problem, it sounds like you may not have created your application in the Marketing Cloud's App Center with a Legacy Server Token from Google.