https://github.com/mike4192/spotMicro
https://github.com/jpereirajr/spotMicro
http://bradanlane.gitlab.io/ros-i2cpwmboard/i2cpwm__controller_8cpp_source.html
https://docs.ros.org/en/foxy/Tutorials/Creating-Your-First-ROS2-Package.html
https://docs.ros.org/en/foxy/Tutorials/Custom-ROS2-Interfaces.html
https://github.com/micro-ROS/micro_ros_espidf_component
https://github.com/michaelkubina/SpotMicroESP32
https://www.thingiverse.com/thing:4937631