Global variable won't update inside void loop arduino

Question

I need to update my global variable once I get a 'overdtrue' response and light up my LED but only my LED is lighting up but my global variable is not updated.

Here is my code

int x = 0;

void loop() { 
if (content.indexOf("ovrdtrue") > 0)
 {
  x++;
  digitalWrite(ledPin, HIGH);

 }
fsrReading = analogRead(fsrAnalogPin);
Serial.print("Analog reading = ");
Serial.println(fsrReading);
Serial.print("X: ");
Serial.println(x);
}

The x value should be 1 but only the LED has light up. Please help.

Answer 1

It seems like I forgot to include an if else condition above the ovrdtrue.

if(content.indexOf("true") > 0)
{
  digitalWrite(ledPin, HIGH);   

}

Arduino is reading this condition even though the data received "ovrdtrue" but this contains some word "true" so this is the one getting read and not the ovrdtrue condition. I just changed the condition variable not close to the word true and it worked fine. I'm sorry for this.

Answer 2

You never set the LED pin to LOW, so it will stay lit up regardless of the global variable.

Answer 3

Are you sure the LED is not lighted from the start? It's unclear if in the Setup you set the light on or off (or it is default on or off).

Print a Serial print inside the if statement to be sure that the if block is entered, also print before the if the value of content to be sure if 'ovrdtrue' is found in the string.

Also, since you want the LED on in this situation, explicitly set it off in the setup.

Answer 4

Here is my code

your code ran without setup()?

you are conditionally incrementing "x", and if your condition doesn't hold true, the increment doesn't take place.