I have an alarm for "tea time", "lunch time" and "tea time". It works well at times but occasionally it gets stuck on the alarm not resetting, other times it does not trigger the alarm.Please help I am new to Arduino and all of this.

Here is the code:

#include <LiquidCrystal_I2C.h>#include <ThreeWire.h>  #include <RtcDS1302.h>ThreeWire myWire(4,5,2); // IO, SCLK, CERtcDS1302<ThreeWire> Rtc(myWire);LiquidCrystal_I2C lcd(0x3f,16,2);int Relay = 7;void setup () {    //RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);    //Rtc.SetDateTime(compiled);    Serial.begin(9600);    lcd.init();    lcd.backlight();    lcd.clear();    lcd.setCursor(0,0);    lcd.print("  ClearChoice");    lcd.setCursor(0,1);    lcd.print(" Installations");    delay(5000);    lcd.clear();    pinMode(7, OUTPUT);    pinMode(8, INPUT);    digitalWrite(Relay, LOW);}void Alarm(){    digitalWrite(Relay, HIGH);     delay(3000);        digitalWrite(Relay, LOW);  }  void AlarmActive(){    RtcDateTime now = Rtc.GetDateTime();    int MySec = now.Second();    int MyMin=now.Minute();    int MyHour=now.Hour();    int MyDay=now.DayOfWeek();           if(MyHour==10 && MyMin==00 && MySec==00 && MyDay<=5)    {        Alarm();    }    if(MyHour==10 && MyMin==15 && MySec==00 && MyDay<=5)    {        Alarm();    }    if(MyHour==12 && MyMin==00 && MySec==00 && MyDay<=5)    {        Alarm();    }    if(MyHour==12 && MyMin==30 && MySec==00 && MyDay<=5)    {        Alarm();    }    if(MyHour==15 && MyMin==00 && MySec==00 && MyDay<=5)    {        Alarm();    }    if(MyHour==15 && MyMin==15 && MySec==00 && MyDay<=5)    {        Alarm();       }}  void Clock(){    RtcDateTime now = Rtc.GetDateTime();    int dayOfWeek = now.DayOfWeek();    String days[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};            lcd.setCursor(0,0);    char buffer[3];    lcd.print("Date: ");    lcd.print(now.Day());    lcd.print("/");    lcd.print(now.Month());    lcd.print("/");    lcd.print(now.Year());    lcd.setCursor(0,1);    lcd.print("Time: ");    sprintf(buffer, "%02d", now.Hour());    lcd.print(buffer);    lcd.print(":");    sprintf(buffer, "%02d", now.Minute());    lcd.print(buffer);    lcd.print(":");    sprintf(buffer, "%02d", now.Second());    lcd.print(buffer);    lcd.setCursor(0,1);        Serial.print("Time: ");    Serial.print(now.Hour());    Serial.print(":");    Serial.print(now.Minute());    Serial.print(":");    Serial.print(now.Second());    Serial.println();    Serial.print("Date: ");    Serial.print(now.Day());    Serial.print("/");    Serial.print(now.Month());    Serial.print("/");    Serial.print(now.Year());    Serial.println();    lcd.print("Time: ");    Serial.println(days[dayOfWeek]);    Serial.println();    AlarmActive();        delay(1000);      }void loop () {      Clock();      }

• 2
  Please try delaying only for like half a second instead of a full second inClock(). Currently you are probably occasionally missing the relevant second of an alarm.

  chrisl

  – chrisl

  2023-06-26 08:54:48 +00:00

  CommentedJun 26, 2023 at 8:54
• Thank you. Will give it a try.

  Nic Kemp

  – Nic Kemp

  2023-06-26 09:00:40 +00:00

  CommentedJun 26, 2023 at 9:00
• 1
  Also,Alarm() has a 3-second delay. This can contribute to the issue you are seeing, as @chrisl mentioned. Check out an example called "blink without delay". That should give me some idea about how NOT to use delay.

  Fahad

  – Fahad

  2023-06-26 10:19:22 +00:00

  CommentedJun 26, 2023 at 10:19
• 1
  @Fahad: You changed the code while reformatting it. Maybe you should explain to the OP that the emptyelse statements have no effect at all and can be removed.

  Edgar Bonet

  – Edgar Bonet

  2023-06-26 14:43:22 +00:00

  CommentedJun 26, 2023 at 14:43
• 1
  forget the seconds ... trigger the alarm on day, hour, minute ... insert a 60 second delay at end of alarm() so that it triggers only once every alarm time

  jsotola

  – jsotola

  2023-06-26 15:20:57 +00:00

  CommentedJun 26, 2023 at 15:20

1 Answer1

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