How do you read simple data from firebase?

I am working on a school project with some esp8266 and i have coded them to send their data to firebase. It is a parking spot project, so i want to make an app that i can see which spots are occupied, but it's my first time with the combination of firebase and appinventor and i am not so sure what to do.

I just need to figure out how to get these 0 or 1 numbers to the appinventor code

Are you using secure rules for your authenticated user/s ?

If rules are read/write true then see here for an example:

Also read here too

Since you are new you must read the tutorial or guide of the mit app inventor component first :1st_place_medal: