Beginner questions (RPi, eBus coppler, heat pump)


I would like to connect a Raspberry Pi 3 to a bartl heat pump with an USB eBus coppler.
To communicate I need the telegram specifications from bartl, right? So I should ask them if I could get them or maybe I should ask TEM which seem to have made the controller for bartl.
Or is it easy to set up because telegram communications are mostly standardized and pretty much the same for most heat pumps?