ArduinoUNO Programming and Debugging using Atmel Studio 7

For the External Tools setup: The Command should be pointing to avrdude.exe of your Arduino IDE. E.g. in my setup: C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude.exe The Arguments should be the same arguments used by the Arduino IDE except for the hex file location. E.g. in my setup: -C"C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf" -v -patmega328p -carduino -PCOM3 -b115200 -D -Uflash:w:"$(ProjectDir)Debug\$(TargetName).hex":i (I have to add "..." for the file locations to make it works)