Yes, I understand that. The translation makes it sound like they have published the software and design, or are somehow making boards available.

To improve coverage, we need your support! We have built a board with *ESP32-C5* and *PoE* that allows you to capture *C-ITS* packages yourself, and provide us for our face-up card, or process it yourself.

Edit: found it, https://codeberg.org/opentrafficmap