ButtonCounter

Projects Programming
1

Dear Users,

I just wanted to code an Button, which counts how often it gets pressed.

Code:

void setup()
{
  pinMode(4, INPUT_PULLUP);
  Serial.begin(9600);
  int ButtonCounter = 0;
}

void loop()
{
  
  int ButtonStatus4 = digitalRead(4);
  
  if (ButtonStatus4 == 0){
    int ButtonCounter + 1; 
    Serial.println(ButtonCounter);
  }
  
}

And I get the error message:

In function 'void loop()':
14:23: error: expected initializer before '+' token
15:20: error: 'ButtonCounter' was not declared in this scope

Can someone help me?

Best regards,

Nvco

2

I found a solution for the error message but now I have another problem

My Code:

int ButtonCounter = 0;

void setup()
{
  pinMode(4, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop()
{
  int ButtonStatus4 = digitalRead(4);
  
  if (ButtonStatus4 == 0){
     ButtonCounter + 1; 
    Serial.println(ButtonCounter);
  }
  
}

If I press the Button I just get 0 in the output until I stop pressing it.

Hope somebody can help me

3

It will work as written but won't do what you want because you are detecting when the input is LOW rather than when it becomes LOW

Take a look at the StateChangeDetection example in the IDE

4

And you also need 'ButtonCounter = ButtonCounter + 1' (or the short form 'ButtonCounter += 1').

If you just say 'ButtonCounter + 1' that adds 1 but then throws the result away.

Steve

5

Thanks, I fixed it.

6

nvco:
Thanks, I fixed it.

For the sake of anyone with a similar problem finding this thread in future please post your fixed sketch and maybe an explanation of the changes that you made and why

7

You had better debounce for button. If not, it may count wrongly.