Steve Ulrich used 1.5K according the above post, and I did the same. Works fine for me. 2.03V was exactly what I measured, and this is not consistently read as a HIGH signal. Sorry can‘t send you a picture now as I am in a middle of milling my wasteboard, but will do as soon as I can. It is simply soldering the resistor as Robert wrote, on the soldering side of the board.