HI ! I have some question about this example.

[peterlin300]

HI! i am a beginner in linux,ROS and microcontroller. I have some question about this example.
i found this anwser http://answers.ros.org/question/190615/problems-with-serial-port-code-for-ros/
and i find i can use wjwood serial to communicate microcontroller and ros by the UART.
In this example means i can recieved string from microcontroller and send string to microcontroller(listen another ROS node) from PC.
In microcontroller(like Arduino or others) i just need to set serialport ,baudrate....or something to recieved string,and i didnt need ROS code (like ros::Subscriber sub.....) to Subscribe string from PC.
By the way i will send you a email for other help(the first ros program),i dont have any direction about it
I'm terribly sorry about my poor english
best regard!