Wow, many questions…
Fibaro is always Z-Wave, it has for the App a specific Topic: [APP] Fibaro - Your home is your castle (by Athom)
For all Fibaro / App / Device related Questions of Fibaro , please ask there.
and Z-Wave is a 2-way communication protocol See here: What is Z-Wave? | Homey
And NO, it isn’t IO - That’s a dirty proprietary that is only closed / secret by Velux / Somfy
Never Heard of TRS …
RTS is probably the simple RF signal Somfy also uses but one way…
