I have uploaded the arduino side by an external pc , after the bossac.exe was moved into the related folder ,I have followed the tutorial from udoo team That's good ! It works fine After I plug the jumper but arduino doesn't send nothing To receive in java application via rxtx I have to reboot udoo Is this the correct way or I have to do something by terminal to riactivate the serial line udoo-arduino ?
You need to leave the jumper unplugged in order to talk with the arduino processor from an external PC. If you plug the jumper you're able to talk with the other processor. If your java application talk through the internal serial then the procedure you did is correct (reboot the UDOO after programming the Arduino via the external serial).
