I am not sure what it is. It looks like it might be an Arduino-compatible control board that is somehow especially well suited for ROS. But OTOH I see configurations that combine a Pi with an OpenCR so that confuses me. I've seen this: [OpenCR](
http://turtlebot3.readthedocs.io/en/latest/appendix_opencr.html) and this: [OpenCR}(
https://github.com/ROBOTIS-GIT/OpenCR) but I am still not sure...
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