Riva:
What pins is it wired to. From the manual3.4.1 Com Setup Switch
The four toggles are located on the Com Setup Switch shown in Figures 2-3 and
3-4 should all be set to the “On” position.
These are actually physical on/off switches that are mounted to the board on the pump. I have them all switched to the on position so that the baud should be 9600.