  State machines are a common mechanism for defining behaviors in robots,
defining them based on identifiable stages. There are several libraries
available for easing the implementation of state machines in ROS 1, as SMACH or
SMACC, but there are fewer alternatives for ROS 2. YASMIN is yet another
library specifically designed for ROS 2 for easing the design of robotic
behaviors using state machines. It is available in C++ and Python, provides
some default states to speed up the development, and a web viewer for
monitoring the execution of the system and helping in the debugging.
