Hi @SmartLiving.Rocks I have adapted parts of your Blueprint to work with HomematicIP here: https://community.home-assistant.io/t/homematic-reduce-room-temperature-when-a-window-or-door-is-opened/341053
This uses a service call homematic.set_device_value to set the WINDOW_STATE parameter directly, so it emulates the operation of HomematicIP door/window sensor.
It’s been in use for several months now, and it works fine.