Alarm clock with snooze function project help?

[gcmacp]

Hi. I am trying to create an alarm clock which turns on and off a buzzer when hours, mins and seconds match. In addition I am trying to snooze the alarm (Turn the buzzer off for a period of time when the button is pressed and then back on again for a period of time).

I have set the snooze duration at 10 seconds in the code for testing purposes. I.e push button to cancel alarm then delay for 10 seconds and turn alarm back on again. (I am aware there needs to be another delay added to turn back off again.)

The issue I currently have is if I toggle the button state and keep it on when pressed the buzzer would cancel as anticipated, The delay would be implemented but obviously the loop keeps cycling round and turning the buzzer off during the delay.

Is there an easier way to achieve this or am I missing something simple?

#include <Wire.h>                   // for I2C communication

#include <LiquidCrystal_I2C.h>      // for LCD

#include <RTClib.h>                 // for RTC

#define Alarm3Pin 3

int BuzzerState = LOW;

unsigned long BuzzerStarted = 0;

const long Snooze = 10000;

const int buttonPin = 2;

int buttonState = 0;

LiquidCrystal_I2C lcd(0x27, 16, 2); // create LCD with I2C address 0x27, 16 characters per line, 2 lines

RTC_DS3231 rtc;                     // create rtc for the DS3231 RTC module, address is fixed at 0x68

char daysOfTheWeek[7][12] = {

  "Sunday",

  "Monday",

  "Tuesday",

  "Wednesday",

  "Thursday",

  "Friday",

  "Saturday"

};

void setup()

{

  pinMode(Alarm3Pin,OUTPUT);//

  pinMode(buttonPin, INPUT);

  Serial.begin(9600);

  Serial.println("Initialize rtc");;

  while (!Serial) ; // wait for Arduino Serial Monitor

 

  lcd.init();       // initialize lcd

  lcd.backlight();  // switch-on lcd backlight

  lcd.clear();  // clear LCD display

  rtc.begin();       // initialize rtc

  //rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));

 

}

void loop()

{

  DateTime now = rtc.now();

if (now.hour() == 11 && now.minute() == 50 && now.second()==00)

   

      digitalWrite(Alarm3Pin,HIGH);

     

if (now.hour() == 11 && now.minute() == 13 && now.second()==00)

   

      digitalWrite(Alarm3Pin,LOW);

    //if (now.day() == 23 && now.hour() == 06 && now.minute() == 28 &&now.second()==10)

    {

      //digitalWrite(Alarm3Pin,HIGH);

 

    }

        // read the state of the pushbutton value:

    buttonState = digitalRead(buttonPin);

        // check if the pushbutton is pressed. If it is, the buttonState is HIGH:

    if (buttonState == HIGH)

   

    // turn Alarm3Pin off:

    digitalWrite(Alarm3Pin, LOW);

unsigned long currentMillis = millis();

  if (currentMillis - BuzzerStarted >= Snooze) {

    BuzzerStarted = currentMillis;

    if (BuzzerState == LOW) {

      BuzzerState = HIGH;

    } else {

      BuzzerState = LOW;

    }

    digitalWrite(Alarm3Pin, BuzzerState);

  }

 

  if (!rtc.begin()) lcd.print("error");

 

  if (now.hour() < 10) lcd.print("0");

  lcd.print(now.hour(), DEC);

  Serial.print(now.hour(), DEC);

  lcd.print(':');

  Serial.print(':');

  if (now.minute() < 10) lcd.print("0");

  lcd.print(now.minute(), DEC);

  Serial.print(now.minute(), DEC);

  lcd.print(':');

  Serial.print(':');

  if (now.second() < 10) lcd.print("0");

  lcd.println(now.second(), DEC);

  Serial.println(now.second(), DEC);

  delay(1000); // delay 1 seconds

  lcd.clear();

  lcd.setCursor(0, 0);

}

[Brazilino]

Hi!

This topic is duplicated at https://forum.arduino.cc/t/alarm-clock-with-snooze-button-is-it-possible/973860/31.

Duplicating threads is not cool and it´s against the Forum rules. Ask a Mod to merge them.

[gcmacp]

This code has been updated therefore different surely?

[blh64]

You want to re-write your code to act like a state machine. Initially, you would be in the WAIT state until the alarm goes off, then you transition to the ALARM state which means the buzzer is ON. During this state, if the cancel button is pressed, you enter the SNOOZE state, If you have been in the ALARM state xx seconds, then you can transition to another state (SNOOZE, etc.)

The key is to react to your button press in combination to what state you are in and then, possibly transition to a new state. Google will give you lots of examples. Sometimes it is referred to as a Finite State Machine.