@citybird said in Duet 2 WiFi - connecting 3 wire 5v fans:
Just found this guide, It should clear up many questions: https://forum.prusaprinters.org/wp-content/uploads/wpforo/default_attachments/1596858738-ZMK3s-Duet2W.pdf
Looks like they used my end print jingle
; Play a triumphant tune to celebrate a successful print. G4 S1 M300 P250 S750 G4 P251 M300 P200 S1250 G4 P201 M300 P250 S750 G4 P251 M300 P200 S1250 G4 P201 M300 P250 S2500 G4 P251 M300 P150 S2000 G4 P151 M300 P150 S2500 G4 P151 M300 P350 S3700 G4 P351 M400