Tobias and Felix from the Hochschule für Technik Rapperswil have completed their Bachelor project on the topic of general-purpose data transmission over DAB, and their report is now public:
The source code they wrote is available in the libdata repositories in the Opendigitalradio github. And example application to illustrate the library will be uploaded into the data-over-dab-example repository.
Edit: the report is available
