Button state change detection

Projects Programming
1

Hello,

As the input state changes in the state change detection example the led is turned on/off .

Following is my code

int buttonInput = 2;
int led = 13;

int lastButtonState = 0;
int buttonState = 0;
int buttonPushCounter = 0;


void setup() {
  Serial.begin(9600);
  pinMode(buttonInput,INPUT_PULLUP);
  pinMode(led,OUTPUT);

}

void loop() {
  buttonState=digitalRead(buttonInput);
button();
}

void button()
{
 if(buttonState !=lastButtonState )
 {
  if (buttonState == HIGH) {
      // if the current state is HIGH then the button
      // wend from off to on:
      buttonPushCounter++;
       Serial.print("number of button pushes:  ");
       Serial.println(buttonPushCounter);
       unsigned long currentMillis = millis();
       while(millis()< currentMillis + 20000)
       {
        Serial.println("Inside While");
      if(buttonPushCounter>1)
      {
      digitalWrite(led,HIGH);
      Serial.println("on");
      buttonPushCounter = 0; 
      }
       }
    } else {
      // if the current state is LOW then the button
      // wend from on to off:
      Serial.println("off");
      digitalWrite(led,LOW);
    }
    // Delay a little bit to avoid bouncing
    delay(50);
  
 }
    lastButtonState = buttonState;
    
}

i want to "on" the led on second count and that should be done in certain period of time, as the code works when buttonPushCounter=1 and it goes in while loop for 20sec but it doesn't detect the second buttonPushCounter , and after 20sec it exits the while loop i want to detect the buttonPushCounter in the given 20sec time

2

JairajDange:
i want to "on" the led on second count and that should be done in certain period of time, as the code works when buttonPushCounter=1 and it goes in while loop for 20sec but it doesn't detect the second buttonPushCounter , and after 20sec it exits the while loop i want to detect the buttonPushCounter in the given 20sec time

are you saying you want a different action for a double click?

3

i want to on the led on the second press, the while loop starts on the first press . If there is no pressing of button in the while loop it should exit while loop.

4

Is there no one who could help

6

You never read the push buttons inside the while loop, it always has the value it has when you entered it.