This app was mentioned in 3 comments, with an average of 2.00 upvotes
Have you tried this one?
https://play.google.com/store/apps/details?id=com.stevo.remotecontrolforpopcorn
I'm using this one and it's really great.
Have you tried this one?
https://play.google.com/store/apps/details?id=com.stevo.remotecontrolforpopcorn
Maybe it's easier to set up.