(simple) Debouncing 2 button state machine

[blackbird78]

@PerryBebbington

Welcome and well done for the code tags on your first post.

I don't know what is in the code Bounce2 as you have not shared it, but I strongly suspect from what I can see that you are detecting when a button is pressed rather than when it becomes pressed. That means each time the loop function goes round it detects the button being pressed and increments or decrements the state machine again for as long as you hold the button. There are tutorials on this: in the IDE there is the debouce example, there is my tutorial Buttons and other electro-mechanical inputs (introduction) - #2 by PerryBebbington and if you do some searching there are other tutorials.

What is this for:

int old = 0;

?
Any of the following will add 1 to the variable state

state = state + 1;
state += 1;
state++;
++state;

Thank you for the tips! I have been reading through your links. I think I tested your debounce before, and thought that library was actually it. I don't really know where that library came from honestly.

I like the use of bool

int old = 0;

This is just from what I saw others doing, I was questioning what the purpose was. The state list options you gave me were perfect. I will eventually make the current state int store in EEProm.

My guess was that this debounce library was doing something odd, so I played with the MS....

debouncer1.interval(50);

Ranging from 5 to 200 ms values had no change in state change behavior. However, when I tried another debounce library I wasn't even getting an input signal. So I came here to see if there was something glaring that was off.

I am going to test this again, with a hodge podge from what was posted, to see if there is a hardware issue or if it's purely software.