This is very cool, thanks for sharing @Kei. Good to see some additional effort in hardware modularity within the ROS ecosystem. Specially one powered by microcontrollers. I encourage you guys to look at HRIM. We are working with a variety of partners to facilitate hardware interoperability and your contributions will be more than welcome.
Also, this is extremely aligned to the OFERA EU project and I’m looking forward to see further collaborations between your group and ours.