(simple) Debouncing 2 button state machine

[gcjr]

@PerryBebbington

I am firmly in the 'never use delay' camp, others don't agree. You have found for yourself what problems it causes with your concern over whether PID will work properly.

it depends on the requirements.

in this case, the PID requirements suggests (??) not using a delay and i showed button code not using delay

but the comments from the OP are confusing