Just to share something, I finaly got my Itho 868MHz central ventilation online
It runs on a Nodemcu and has a simple web interface with API and OTA.
Code is on github https://github.com/incmve/Itho-WIFI-remote
Or on my blog https://www.maredana.nl/itho-mechanical-ventilation-with-esp8266/
I’m not a coder so don’t expect much
PS not sure if this is the right place @leader21 ?
EDIT It now remembers the last state and updates a variable in pimatic.
EDIT2 I converted the code to MQTT https://github.com/incmve/Itho-WIFI-remoteMQTT