For completeness... I did try I0 and I1 but that made no difference.

Hi,

I have installed my new DuetWifi board today and all seems to be working except for my PrecisionPiezo probe that does not want for invert.

RepRapFirmware for Duet 2 WiFi/Ethernet version 1.21 running on Duet WiFi 1.02 or later

I have the following definitions:
M574 X2 Y2 Z2 S1
M558 P4 F420 H20 I1 T9000
G31 P600 X0 Y0 Z0
M557 R160 S20

In the machine monitor the E0 probe shows inverted values but it triggers when I tap the hot end.

Any suggestions on what more I can try?