Police light push button while loop

Projects Programming
1

Hi!

After +- 5 years I am back to Arduino! I have a question how can I add a while loop to my code for red and blue leds blinking while till I turn it off with button?!

int button = 2;

int redLed = 8;
int blueLed = 10;

int ledFlag = 0;

void setup() {

  pinMode(button, INPUT_PULLUP);

  pinMode(redLed, OUTPUT);
  pinMode(blueLed, OUTPUT);
  digitalWrite(redLed, LOW);
  digitalWrite(blueLed, LOW);

  Serial.begin(9600);
}

void loop() {

  if (digitalRead(button) == LOW)
  {
    if (ledFlag == 0)
    {
      ledFlag = 1;
      digitalWrite(redLed, HIGH);
      delay(200);
      digitalWrite(blueLed, HIGH);
      delay(200);
      digitalWrite(redLed, LOW);
      delay(100);
      digitalWrite(blueLed, LOW);
      delay(100);
      Serial.println(ledFlag);
    }
    else {
      ledFlag = 0;
      digitalWrite(redLed, LOW);
      digitalWrite(blueLed, LOW);
      Serial.println(ledFlag);
    }
    delay(500);
  }
}

I tried to add while loop but then it goes over and over and I can't stop it with button. So I hope for your help.

2

Yes, of course. Nothing can happen in loop() while any delay() call is running. Use millis() instead.

3

Try reading these then try writing your code again from the start:
https://forum.arduino.cc/index.php?topic=503368.0
https://forum.arduino.cc/index.php?topic=223286.0
https://forum.arduino.cc/index.php?topic=719995.0

I think those cover what you need.

4

In your code, you uses the delay() function. This makes your code miss some button pressing event. Use millis() function instead. See how to use millis() instead of delay()

5

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