Hi, I wanted to use 2 Arduino2560 with an ATMega8u2 as usb to serial converter for GIMX . The first one is for the serial communication and the other one for the firmware. http://www11.pic-upload.de/thumb/09.11.14/oyviifnwk7ed.jpg http://www11.pic-upload.de/thumb/09.11.14/1gwhw898dujw.png Flashing t...