ABG
2
Your Firebase URL
https://abcdef-1c925-default-rtdb.asia-southeast1.firebasedatabase.app/
probably won't work with the AI2 Firebase component.
It needs a us central server.
Koookie
3
Ive changed it but still blank screen.
vbvvb (1).aia (41.8 KB)
ABG
4
Firebase has a data console where you can see what's in the database.
What does it show?
If you are loading the data from a hardware sketch, show the sketch.
Koookie
5
(removed, for sensitive info)
ABG
6
You need a Firebase Error event block to catch Firebase errors.
(draggable)
Also, I noticed you had a leading blank in both

blocks.
Koookie
7
Thanks! But its still blank screen. 
ABG
8
I get the message
Error from Companion: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
I followed the steps at
for some one else who got this error, but they did not help.
I am not in a position to verify the part about the us-central server.
I suggest reading the @TIMAI2 articles in the FAQ on reading the Firebase data via its Web API.
You might need to be redirected to find them.
1 Like
ABG
9
I also get an error message
when I try to write to the database with my own tag.
Something is wrong with the setup for your database, and I have lost track of where to look for correct Firebase database setup instructions.