Hi there guys,
first post by the way ;).
So my question is, if there is already a way to integrate one of those devices into the home assistant (in my case HAOS on RPi 4).
If my understanding of the Olympia infrastructure is correct, all the sensors of this brand are communicating by 868 mHz frequency, but the gateway itself is bound in by Wi-Fi.
So is it maybe possible to read all the sensors bypassing the gateway? Would be great, because most of the sensors of Olympia are cheap and also the gateway itself only costs 31,- €.
FYI: I’m looking for a hidden window sensor with a long battery or maybe even unlimited lifetime, so I don’t have to change it every half a year.
I’m grateful for every response which will help me to enhance my HA environment 
.