Serial Communications from UDOO Dual to Arduino

I can't seem to get serial communications to work as expected from UDOO Dual to Arduino. I am using serial to prompt user for input.

Code:

Serial.print("Enter 8bit value: ");
r=Serial.parseInt();

My baud rate is 115200. I tried terminal commands found here to set the baud and serial settings but didn't work:

http://www.udoo.org/ProjectsAndTutorials/interaction-between-linux-and-arduino-on-udoo/

 

Did you use

stty -F /dev/ttymxc3 cs8 115200 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts

?

Try with sudo or root privileges

 

Try it with just some form of echo. Something like:
Serial.print( Serial.read() )