Hello wx4cb,
Thanks for the information. Connecting through USB-Serial converter was an option I was trying to avoid, but nevertheless it is a possible solution.
Concerning the 4 pins header near the 28 pin header I was expecting to be an UART as it writeen in the wiki: http://wiki.seeedstudio.com/ODYSSEY-X86J4105/#pinout-diagram
But I guest if you are point to the other thread is because it is not 
Regards,
Paulo Carmo