I will try to make it work during the weekend. The LED lights are integrated with the blind (see https://www.weinor.de/opaldesign/) and it is operated with the same remote control.
@ggg: The Elero usb stick will work as soon as it has a USB power connection. You only need to teach the stick according to the Elero/Weinor rules. There are four buttons on the stick (up, down, p for stopping and programming and select to choose the channel). But I have no clue how to operate it from the raspberry Pi without using openHab and Volkers binding.