Again, I appreciate your help. I've had no luck though; always resulting with the same error message: avrdude: AVR device not respondingavrdude: initialization failed, rc-1 Double check communication and try again, or use -F to overide this check.
I have consistently received this result after: Formatting, downloading, burning & installing the most recent NOOBS Formatting, downloading, burning & installing the most recent jessie Replacing existing programmers.txt with ArduBerry programmers.txt Format & reinstall jessie & found no__difference between the two versions of that file Edited rpi version uncommenting the "gpio.programmer = gpio" line Formatted, downloaded, burnt & installed Dexter robot version.I've also tried different rpi boards; a rpi 3B and a PiZero with same results.
I'm only going to ove this one more day. If you can't come up with a solution, I'm going to give up and pull my DC jack, voltage regulator and capacitors that I installed on the board and pitch this thing. I've spent more time than necessary trying to get this to work. I don't know what the issue is, but with your instructions, I am unable to make this work.