I am working on a MIT App Inventor app, and it is writing/reading data in a Firebase application.
The database structure is “type” (ex Temperature, Humidity, Wind), and then rows are date/time as tag or key, then the data value.Firebase data sample. The 2nd screen of the app I want to show a log of data. The screen looks like sample of screen

I have a spinner feature selecting the first level (tag) of the data.

What I want the screen to do is populate with rows of data once the spinner selection is made. Right now the code show show the first row but I get blanks. When I modified the code it would show the tag in the text box.
How should I read thru the data and split the json of the row key into date and time format?

I did a getValue block but it is not displaying the data.MIT APP Blocks