I bought 4 extracoreMD boards. I used one in a breadboard and was successful uploading sketches using a Adafruit USB to FTDi adaper. It uploads fine at 115200 without any problems. The other three only show that the PC transmitted but the board never responds.. Do I need to change any upload settings? In debugging I tried a failing one, then the only one that loads and another one that also fails. Any help would be appreciated. I really need to get this board working since it is the only one that will physically fit my application.
I get this from the Arduino IDE for one that fails.
avrdude: Version 6.0.1, compiled on Apr 15 2015 at 19:59:58
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2009 Joerg Wunsch
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"
Using Port : COM8
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x30
Interfacing hardware, sensors, output drivers, chips.