Hello, I'm beginner on Udoo board. I have some questions on it. If I want to execute C++ on Udoo Linux (./filename) to send some datas for Udoo Arduino 1. Does the Udoo OS, Linux, communicate to Udoo Arduino via by internal RS232? 2. How to set hardware (Udoo board) and software (Linux) before executing? (I already reference this web page http://www.udoo.org/ProjectsAndTutorials/interaction-between-linux-and-arduino-on-udoo/) 3. If possible, I need some example code both of C++ and Arduino C to know how to send and receive data. Thank you for help.