A final note as I mark this 'resolved': The final root cause of this was never really discovered. The ruggeduino boards work perfectly. Olimex never got back to me with any real results. I have to conclude it was their shield which was the problem.
A final note as I mark this 'resolved': The final root cause of this was never really discovered. The ruggeduino boards work perfectly. Olimex never got back to me with any real results. I have to conclude it was their shield which was the problem.