The yearly challenge way organized the first time in 2014. But there are other categorized contests as well. The robotics category in the yearly challenge seems to be new. However the list of projects show a lot of robotics projects. The main sites of recent yearly challenges:
- 2017 Hackaday Prize
- 2016 Hackaday Prize
- (could not find the 2015 main page)
- (could not find the 2014 main page)
There are a lot of potential ROS projects (323 hits when searching for “ros”) on hachaday.io but probably no ROS2 projects (0 hits when searching for “ros2”) yet.
If I where student I’d love to hack around with ROS2 and HROS 