SLOWRF (FS20,S300TH,EM1000...) Binding?

Hello there,

i am new in this forum. I want to replace my FHEM with openhab2 and have some difficulties integrating my SlowRF components.
Can openhab2 directly communicate over a coc (the original from busware) to different SlowRF devices like s300TH, EM1000, FS20? Or shall i better use opengear as an intermediate layer?
Is there any discovery mode like in FHEM?
What binding do i have to install? I only find FS20 binding but i am not sure if i can use it for S300TH sensors?
Sorry for these beginner questions, i tried to find answers in the forum but still have questions…