Thank you very much!
It is also working very well with my RM4Mini and OH3.1.M5 after upgrading from M3 (it was not working with OH3.1.M3). I recorded the codes with the python-broadlink module (GitHub - mjg59/python-broadlink: Python module for controlling Broadlink RM2/3 (Pro) remote controls, A1 sensor platforms and SP2/3 smartplugs).
After struggling a bit with the broadlink-mqtt solution I was very happy to find this binding.
However, it was quite difficult to find this binding, as this thread is huge and also the topic is not suggesting a working binding.
Are there any plans to add it to the official openhab-addons repository?