Recording on Arlo camera when someone knocks

Hi all,

I’m a new user to Smart things and I’m still configuring everything to work to my needs. I’ve been reading alot of threads which look into Pistons and Core etc and they all seem very confusing!

Just wanted to know if anyone could help me up to set up a smart app or something similar to be able to set up Arlo recording when someone knocks on the door, but only when the door does not get opened.

Many thanks!