the semester has ended some weeks ago, i forgot to post the progress in the last days, so here is how the cross and the station look like:
in the station, there is an arduino board connected to an easyradio transceiver, sending out the station byte every second, in the image, it would be a “two”.
in the cross, the arduino gets the byte and lets the yampp play back the according track. inside the cross, it looks like this:
further documentation will hopefully be online soon.