need a mechanical pause button (1 reply)

hi
I need a mechanical pause button
uploaded attach code but when connect GND to d42 nothing happens!!not pause pirnting!!
changing button state between LOW and High but nothing happens
Even I connected 5V but nothing happens
It is possible not enable aux2 pin in marlin 2.0 bugfix?
are you have any idea?
I want it when pin 42 is connected to GND
Execute commands simultaneously M109/M25/M24
and when disconnected run M109 and M24