My problem turned out to be a misbehaving sdcard. The SDCARD worked fine with the vanilla tinkerboard image, but apparently had issues with the core2-ros image. I bought a new 32gb sdcard. dumped the image, registered the board with the husarion cloud. I used the posted core2 examples as hello world tests.
I’ll install the controller in my 3dprinted bot soon.
I may substitute the HLS-LFCD LDS for the RPLIDAR A2. have you tried the same with Rosbot ?