Ezbutton shows release before press

Projects Libraries
1

I using the simple button event sample. Here is the code

#include <ezButton.h>

ezButton button(38);  // create ezButton object that attach to pin 7;

void setup() {
  Serial.begin(115200);
}

void loop() {
  button.loop(); // MUST call the loop() function first

  if(button.isPressed())
    Serial.println("The button is pressed");

  if(button.isReleased())
    Serial.println("The button is released");
}

This is the serial ouput

The button is released

The button is pressed

The isReleased fires before the isPressed. Why? These are momentary on switches.

2

Hello ruger2019

This is the current state of the switch by starting the sketch.

3

I have set the pins high before the loop, and low before the loop, does not seem to make any difference.

How do I get the "correct" event?

4

Hello ruger2019

Take a view into the libary how this case is handled.

5

I am using the example from the library. Does isPressed mean is release in arduino speak? Not sure I am tracking.

6

Because the ezButton uses INPUT_PULLUP, your button needs to be wired between pin and GND. Did you?

Your two events in the library

bool ezButton::isPressed(void) {
	if(previousSteadyState == HIGH && lastSteadyState == LOW)
		return true;
	else
		return false;
}

bool ezButton::isReleased(void) {
	if(previousSteadyState == LOW && lastSteadyState == HIGH)
		return true;
	else
		return false;
}

So isPressed() will return true if the button went from HIGH to LOW and isReleased() returns true when the button goes from LOW to HIGH.

7

That is the missing part of the puzzle. I have a resistor in the wrong spot. I reversed the LOW and HIGH in the event handlers and all seems to work.

Will rewire when I can.

8

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