avrdude: stk500v2_ReceiveMessage(): timeout with ADDAC VCC
Your log is showing that communication is failing right away (avrdude never gets a proper response). This can mean that 


the VCC is not resetting
there is no bootloader installed 
there is some other defect


You can test case is by manually hitting the reset switch around the time that avrdude starts. If the necessary pins are available, you can exclude case 2 by installing a new boot loader with a programmer, which also tests scenario 3 a bit.