Nanoradar NRA15 uavcan

Hi everyone. I have a nanoradar nra15 and px4 compatible controller. I want to read data from it. After connection and some tweaks I am still nowhere near.
uavcan status give me that RX and TX are increasing, so, there is some communication on a CAN bus. But there is no online nodes. Do I have to write my own driver for this radar? How can I do this and where I can find example?
No, I don’t want to use ardupilot.

Thank you very much, any help appreciated.