How to connect a Sonarpen?

Me 1 month ago in Android 0

I would like to animate using the pressure feature but the app keeps working the same way as if I used my finger. I also tried to change the "draw input" setting to "stylus" and it wouldn't let me draw anything with the pen. Is there any way to connect it properly? 

(I use to draw with another app so I am sure both the stylus and the device work perfectly)