I am having a problem where my backpack won’t accept a sketch unless I unplug both power and the FTDI cable then replug everything every time I want to upload a sketch. Is this a hardware problem or something I can solve in software?
avrdude: stk500_recv(): programmer is not responding
Using Arduino 1.6 on OSX with a genuine FTDI cable from Sparkfun.
That sounds strange but I can’t imagine that it has anything to do with the backpack hardware. The ATmega328 chip has the same Uno bootloader as any Uno-compatible Arduino.
Are you certain that your FTDI cable is genuine and not one of the cheap clones that Sparkfun sells? I quit buying them from Sparkfun because they had a 50% failure rate and Sparkfun refused to believe that was a bad thing.