Dear Community,
I’m owning a Drexel und Weiss X2 (Drexel-Weiss.at) HVAC center and it would be very great to have this connected to my home center. Drexel und Weiss devices already have well documented interface description, would be great to control them.
Protocol description: http://gasserenergy.ch/wp-content/uploads/2015/09/900.6660_01_TI_Modbus_RTU_DE.pdf
Github project: https://github.com/Bernator/smarthome/tree/develop/plugins/drexelundweiss
Regards,
Jegember
It seems like this did not meet the community’s threshold 
there is a way and it’s actually quite simple. what you need is a raspberry pi zero connected via usb to your d&w x² … all you need is a node-red installation on this raspi zero… then you can import a flow (i’m currently working on one for myself that also contains read triggers and control buttons) and then wait for HA (mosquitto) mqtt broker to pick up the new device… done…
@valueerror Do you think you could post a detailed guide on how to do this? I’d like to follow it and do the same with my Drexel & Weiss x2 S7.
Update: @valueerror has instructions and code available here: HowTo.pdf · main · Thomas Weissel / Drexel und Weiss - Node-Red Flow · GitLab