Resolved it by sending it two openhab2 out nodes on the right-hand side, using the item command topic with the two concrete payloads (“enablev” and “disablev” in my case). I am sure I could do this smarter / easier with custom functions but will work on this later. I moved all the 30 HomeKit items to node-red as the stability / speed and integration is great. I did uninstall therefore the HomeKit binding in OH2.