thanks but no joy:

tried another cable (from sewell fastlinx) i had laying around. same problem. RioCar talks to Hyperterminal but i just have a cursor in the Hyperterminal window. If i click in the window i get a vertical cursor that goes away on (enter). I even tried send paste from right click.

all the port settings are good.
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200GB RioCar on 74 ft Cutter circumnavigating the globe.