Reloj con alarmas

#1
Que tal amigos.

Estoy haciendo un reloj con rtc, arduino y lcd 16x2.
Lo que quiero hacer es ponerle las siguientes alarmas:

08:00
09:40
10:00
11:40
12:00
13:40
14:00
15:40
16:00
17:40

Que cuando el reloj marque las horas anteriores active un BUZZER y al mismo tiempo que se active el buzzer mande un mensaje al LCD:

X:00 --> ENTRADA
X:40 --> SALIDA

Quisiera pedirles su ayuda porque como soy primeriza en esto no tengo idea de como hacerlo.
Esto es todo lo que llevo de mi código, tengo el reloj, solo me faltan las alarmas.
Gracias.



Código:
// Real time clock and calendar with set buttons using DS1307 and Arduino
 
// include LCD library code
#include <LiquidCrystal.h>
// include Wire library code (needed for I2C protocol devices)
#include <Wire.h>
 
// LCD module connections (RS, E, D4, D5, D6, D7)
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
 
void setup() {
  pinMode(8, INPUT_PULLUP);                      // button1 is connected to pin 8
  pinMode(9, INPUT_PULLUP);                      // button2 is connected to pin 9
  // set up the LCD's number of columns and rows
  lcd.begin(16, 2);
  Wire.begin();                                  // Join i2c bus
}
 
char Time[]     = "TIME:  :  :  ";
char Calendar[] = "DATE:  /  /20  ";
byte i, second, minute, hour, date, month, year;
 
void DS1307_display(){
  // Convert BCD to decimal
  second = (second >> 4) * 10 + (second & 0x0F);
  minute = (minute >> 4) * 10 + (minute & 0x0F);
  hour   = (hour >> 4)   * 10 + (hour & 0x0F);
  date   = (date >> 4)   * 10 + (date & 0x0F);
  month  = (month >> 4)  * 10 + (month & 0x0F);
  year   = (year >> 4)   * 10 + (year & 0x0F);
  // End conversion
  Time[12]     = second % 10 + 48;
  Time[11]     = second / 10 + 48;
  Time[9]      = minute % 10 + 48;
  Time[8]      = minute / 10 + 48;
  Time[6]      = hour   % 10 + 48;
  Time[5]      = hour   / 10 + 48;
  Calendar[14] = year   % 10 + 48;
  Calendar[13] = year   / 10 + 48;
  Calendar[9]  = month  % 10 + 48;
  Calendar[8]  = month  / 10 + 48;
  Calendar[6]  = date   % 10 + 48;
  Calendar[5]  = date   / 10 + 48;
  lcd.setCursor(0, 0);
  lcd.print(Time);                               // Display time
  lcd.setCursor(0, 1);
  lcd.print(Calendar);                           // Display calendar
}
void blink_parameter(){
  byte j = 0;
  while(j < 10 && digitalRead(8) && digitalRead(9)){
    j++;
    delay(25);
  }
}
byte edit(byte x, byte y, byte parameter){
  char text[3];
  while(!digitalRead(8));                        // Wait until button (pin #8) released
  while(true){
    while(!digitalRead(9)){                      // If button (pin #9) is pressed
      parameter++;
      if(i == 0 && parameter > 23)               // If hours > 23 ==> hours = 0
        parameter = 0;
      if(i == 1 && parameter > 59)               // If minutes > 59 ==> minutes = 0
        parameter = 0;
      if(i == 2 && parameter > 31)               // If date > 31 ==> date = 1
        parameter = 1;
      if(i == 3 && parameter > 12)               // If month > 12 ==> month = 1
        parameter = 1;
      if(i == 4 && parameter > 99)               // If year > 99 ==> year = 0
        parameter = 0;
      sprintf(text,"%02u", parameter);
      lcd.setCursor(x, y);
      lcd.print(text);
      delay(200);                                // Wait 200ms
    }
    lcd.setCursor(x, y);
    lcd.print("  ");                             // Display two spaces
    blink_parameter();
    sprintf(text,"%02u", parameter);
    lcd.setCursor(x, y);
    lcd.print(text);
    blink_parameter();
    if(!digitalRead(8)){                         // If button (pin #8) is pressed
      i++;                                       // Increament 'i' for the next parameter
      return parameter;                          // Return parameter value and exit
    }
  }
}
 
void loop() {
  if(!digitalRead(8)){                           // If button (pin #8) is pressed
      i = 0;
      hour   = edit(5, 0, hour);
      minute = edit(8, 0, minute);
      date   = edit(5, 1, date);
      month  = edit(8, 1, month);
      year   = edit(13, 1, year);
      // Convert decimal to BCD
      minute = ((minute / 10) << 4) + (minute % 10);
      hour = ((hour / 10) << 4) + (hour % 10);
      date = ((date / 10) << 4) + (date % 10);
      month = ((month / 10) << 4) + (month % 10);
      year = ((year / 10) << 4) + (year % 10);
      // End conversion
      // Write data to DS1307 RTC
      Wire.beginTransmission(0x68);               // Start I2C protocol with DS1307 address
      Wire.write(0);                              // Send register address
      Wire.write(0);                              // Reset sesonds and start oscillator
      Wire.write(minute);                         // Write minute
      Wire.write(hour);                           // Write hour
      Wire.write(1);                              // Write day (not used)
      Wire.write(date);                           // Write date
      Wire.write(month);                          // Write month
      Wire.write(year);                           // Write year
      Wire.endTransmission();                     // Stop transmission and release the I2C bus
      delay(200);                                 // Wait 200ms
    }
    Wire.beginTransmission(0x68);                 // Start I2C protocol with DS1307 address
    Wire.write(0);                                // Send register address
    Wire.endTransmission(false);                  // I2C restart
    Wire.requestFrom(0x68, 7);                    // Request 7 bytes from DS1307 and release I2C bus at end of reading
    second = Wire.read();                         // Read seconds from register 0
    minute = Wire.read();                         // Read minuts from register 1
    hour   = Wire.read();                         // Read hour from register 2
    Wire.read();                                  // Read day from register 3 (not used)
    date   = Wire.read();                         // Read date from register 4
    month  = Wire.read();                         // Read month from register 5
    year   = Wire.read();                         // Read year from register 6
    DS1307_display();                             // Diaplay time & calendar
    delay(50);                                    // Wait 50ms
}
 

pandacba

Rocker Bear
#2
Tendras que ingresar las horas de tu alarma como variables y estas compararlas con la hora, cuando se cumpla la condición de igualdad activas la alarma podes utilizar "if"
 
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