Pushbutton with long-press and short-press functionality

I am trying to understand this function on the simples possible setup as attached in the image, using the internal pullup for the input pin. I tried few sketches found online but for some reason, they behaved outside of what I expected, random behavior.

The goal I'm after is simple - if I press the pushbutton it turns the internal (13) LED on, and lets say if I keep it pressed for 3 seconds, the LED starts to flash. How complex is this?

You're not showing a pullup resistor on your drawing. Connect 10k between the input and .... I dont' know whether it should be 3.3v or 5v - whichever one is the Arduino's supply voltage. Without this the input voltage can wander about all over the place when the button isn't pressed.

But I said I'm using the internal pullup.

To make this circuit work, you have to write some code.

ak

Simple way:

When the button is pressed, do the first action, then zero a variable to store a count.

While it is still pressed, run a loop that does eg. a 1mS delay then increments a count variable.
Keep looping as long as the button is held in.

When the button is released, looks at the value in the count variable to see how long it was held for and take appropriate action.


Better way, but more complex, suited for things that you do not want to freeze while the button is pressed (eg. other parts of the program must keep running and doing things):

Have a timer interrupt set up in the program startup, that causes a regular interrupt at eg. 1KHz or 10KHz.
In that interrupt routine, increment a counter (or set of counter) variables to track the time.

Also in that interrupt, or in separate "pin change" interrupts, monitor the button input and save the times it is pressed and released, as well as taking action at the press and looking at the time when it is released.

That's a "real time programming" approach; nothing ever stops the program, you never use delay loops.

Here's some code to start with, it does the push button stuff and I'll let you try doing the LED stuff.
Let us know how you get on.

Mike.
Edit, note it is non blocking so any code you put at the end of the loop will run continuously.