There is always a zero in the buffer

Using Arduino Programming Questions
1

Hi there!

I'm new using arduino so I've begun with simple sketches like this:

[code]
int number;
void setup() {
  Serial.begin(9600);

}

void loop() {
  if(Serial.available()>0){
    number=Serial.parseInt();
    Serial.println(number);
    if(numero==23){
      Serial.println("Number is equal to 23");
    }else if(numero>23){
      Serial.println("Number is more than 23");
    }else{
      Serial.println("Number is less than 23");
        }
  }
}

[/code]

If you write a number in the serial monitor, the code compares to 23 and shows the result correctly but right after appears:

0
Number is less than 23

I've tried with other sketches and it always happens when using if(Serial.available()>0). It seems to me as if there was always a zero value in the buffer.. but I'm not an expert at all.

Any help is welcome, thanks.

2

In the serial monitor, at the bottom, try setting the line ending to "No line ending".

I see you changed "numero" to "number", but missed a couple. :slight_smile:
(You'll get a compile error with the code as shown.)

3

Hi OldSteve!

Thank you very much! :slight_smile: Now it works. I didn't know anything about that part of the Serial Monitor , so I've looked for some information and it makes sense!

Yes, you are right I missed two "numero" :blush: . I just translated from spanish in the post, but the code in my computer is all in the same language :smiley: .

4

Irenuka:
Hi OldSteve!
Thank you very much! :slight_smile: Now it works.

No problem. Glad to help. :slight_smile: