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uBITX Manager Only works when the Arduino is pulled out of the uBITX

 

Hi all,

Putting together a uBITX. I need uBITX manager to calibrate it because it is off. Using KD8CEC's firmware of course with the nextion display.

The uBITX manager software crashes whenever I hit "read from uBITX" unless it is pulled out of the uBITX and is plugged in all by itself. When it crashes, the com port disconnects and reconnects.

What could be causing this? Everything looks fine on the ubitx board and it seems to work other than the poor calibration. Is there a cheat sheet of what pins should be shorted to what on the spot where the ubitx plugs in?
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