Thanks for the quick response. I made a couple of test leads and measured a good 3.3V between the 3.3V, TWD, and gnd. However when I measured TWC, twice, it registered only 136mV. The Duex5 has been swapped and although much longer than the provided ribbon cable, I had an old 50 pin SCSI cable which I tried with the same negative result. So I assume that would point to a problem with the Duet-wifi card.
Thanks
