I read it (although I'm not brilliant) but it looked like that could be used with SPDT not SPST
I also tried INPUT_PULLUP but kept 3 wires config
If I understand correctly I should use use INPUT_PULLUP wiring only two wires on the rocker namely the outer silver pin to D3 and middle one to GND right ?
Edit: I'm sure i saw your reply but now it's gone