When board powered up led turn on for 1min and meanwhile when button pressed turn off it immediately

[shan784]

Hi guys,
I want to write a program when board powered up turn on a led for a one minute and Meanwhile button press (push button) immediately turn off even before automaticallyturn off. How could I do that? I’ve heard something about millis() but I don’t know how to implement that.
Thanks

How can edit this..

#define LED_PIN 11
#define BUTTON_PIN 2


byte lastButtonState = LOW;
byte ledState = LOW;

unsigned long debounceDuration = 10; // millis
unsigned long lastTimeButtonStateChanged = 0;

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop() {
  if (millis() - lastTimeButtonStateChanged > debounceDuration) {
    byte buttonState = digitalRead(BUTTON_PIN);
    if (buttonState != lastButtonState) {
      lastTimeButtonStateChanged = millis();
      lastButtonState = buttonState;
      if (buttonState == HIGH) {
        ledState = (ledState == HIGH) ? LOW: HIGH;
        digitalWrite(LED_PIN, ledState);
        
      }
    }
  }
}

[hammy]

Have a look at the blink without delay example in the IDE.
Post an attempt at your code with this in .

Example

[TomGeorge]

Hi, @shan784
Welcome to the forum.

How to get the best out of this forum

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What Arduino controller do you have?
Have you programmed your controller before?

Thanks.. Tom...

[hammy]

Millis() is a timer that increments every millisecond and can be used to check progress in a sketch …so….
Turn your led on in setup and at the same time make some “unsigned long” variable , say NOW equal to millis.

In loop check to see if millis is then greater than NOW + 60000 , “if” it is turn the led off .
Also in loop ( next line …) check your button input ( button state ?) , “if” that has changed turn the led off .

I’ve deliberately not written the code here , that’s for you to try . It is always best to write your own code than adapt something you don’t understand

[gcjr]

@shan784

I want to write a program when board powered up turn on a led for a one minute and Meanwhile button press (push button) immediately turn off

• a button switch is typically wired between the pin and ground, the pin configured as INPUT_PULLUP so that the pin is normally pulled HIGH and when the button is pressed the pin is pulled LOW

• i usually initialize the button state in setup by reading the pin

• i just add a 10 msec delay when a button is pressed to debounce

• turn LED off if button pressed

• need to turn the LED on in setup

• should capture a timestamp in setup

• loop() can use millis() to see if a minute has passed before turning the LED off

• presumably reset board to start over

[StefanL38]

The example-code that you posted uses the function millis() for debouncing the button.
This is something different that "waiting for a button-press to switch of an LED"

For the task "waiting for a button-press to switch of an LED" debouncing is not nescessary.

As a pseudo-code

in a arduino-board is powered up the function setup() is executed once

So inside function setup() you code:

switch LED ON

if power is supplied to the arduino-board the function loop() is doing what its name says:

looping infinitely.

So inside loop() you have to do two things
checking if the button is pressed
checking how much time has gone by since powerup

if button is pressed: switch off LED

if one minute has passed by: switch LED off.

The established users just link to this very unsatisfying BWD-example.

Here is a short tutorial that is easier to understand as the "standard" Blink-without-delay-example. (I'd like to call it "blink without explain" )

Example-code for timing based on millis() easier to understand through the use of example-numbers / avoiding delay()

non-blocking timing. Execute code only from time to time. There are a lot of different ways to learn programming. This thread wants to add another approach that is different to the yet existing ones. UPDATE 06.01.2023 if you are mainly interested in applying non-blocking timing you can do a quick read of this short tutorial / demonstration If you are intersted in understanding the details how it works go on reading here. I use an everyday analogon in this post to explain the basic principle …

So please start reading the example-code and then ask specific questions if you do not understand something

best regards Stefan