Hi Ullrich,
We don't have any library yet, but I can ask the supplier if such a library is available. Meanwhile, I do have some documentation myself which I attached. The entire document is a pdf, but I can't attach it to the discussion. So I made a screenshot of the only relevant page which talks about triggering of the unibox.
But it's not very elaborate. All of the Netherlands had a day off yesterday, but I will ask our contact person if some other documentation is available for communication with the unibox, like for example a library (sdk of some sort or whatever).
Kind regards,
Micky.