sudo apt-get install ros-noetic-rviz
source /opt/ros/noetic/setup.bash
roscore &
rosrun rviz rviz
https://www.arduino.cc/en/guide/linux#toc2
fix: `Permission denied on /dev/ttyACM0`
sudo chmod a+rw /dev/ttyACM0
roscore
rosrun rosserial_python serial_node.py /dev/ttyACM0
<!-- rostopic pub toggle_led