How can I add the option to enter an additional time to feed? include <DS3231.h>

Question

How can I add the option to enter an additional time to feed?

include <DS3231.h>
#include <Servo.h>
#include <LiquidCrystal.h>
#include <Keypad.h>

const byte ROWS = 4; // Four rows
const byte COLS = 4; // Three columns

// Define the Keymap

char keys[ROWS][COLS] = {

  {'1','2','3','A'},

  {'4','5','6','B'},

  {'7','8','9','C'},

  {'*','0','#','D'}

};

// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.

byte rowPins[ROWS] = { 2, 3, 4, 5 };

// Connect keypad COL0, COL1 and COL2 to these Arduino pins.

byte colPins[COLS] = { 6, 7, 8, 9 };

//  Create the Keypad
  Keypad kpd = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

DS3231  rtc(A4, A5);
Servo servo_test;      //initialize a servo object for the connected servo  
LiquidCrystal lcd(A0, A1, A2, 11, 12, 13); // Creates an LC object. Parameters: (rs, enable, d4, d5, d6, d7)

 //int angle = 0;    
// int potentio = A0;      // initialize the A0analog pin for potentiometer
 int t1, t2, t3, t4, t5, t6;

 
boolean feed = true; // condition for alarm

 char key;
 int r[6];
 
 void setup() 
 { 
  servo_test.attach(10);   // attach the signal pin of servo to pin9 of arduino
  rtc.begin();
  lcd.begin(16,2);
  servo_test.write(55); 
  Serial.begin(9600);
  pinMode(A0, OUTPUT);
  pinMode(A1, OUTPUT);
  pinMode(A2, OUTPUT);
  
 } 
 
 void loop() 
 { 

lcd.setCursor(0,0);
int buttonPress;
buttonPress = digitalRead(A3);

if (buttonPress==1)
 setFeedingTime();
 

//Serial.println(buttonPress);

 lcd.print("Time:  ");
 String t = "";
 t = rtc.getTimeStr(); 
 t1 = t.charAt(0)-48;
 t2 = t.charAt(1)-48;
 t3 = t.charAt(3)-48;
 t4 = t.charAt(4)-48;
 t5 = t.charAt(6)-48;
 t6 = t.charAt(7)-48;
 
 lcd.print(rtc.getTimeStr());
 lcd.setCursor(0,1);
 lcd.print("Date: ");
 lcd.print(rtc.getDateStr());
 
 if (t1==r[0] && t2==r[1] && t3==r[2] && t4==r[3]&& t5<1 && t6<3 && feed==true)
 { 
  servo_test.write(100);                   //command to rotate the servo to the specified angle 
   delay(400);   
  servo_test.write(55); 
  feed=false;
 } 
 }       

void setFeedingTime()
{
  feed = true;
   int i=0;

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Set feeding Time");
  lcd.clear();
  lcd.print("HH:MM");
  lcd.setCursor(0,1);

  
  while(1){
    key = kpd.getKey();

    char j;
    
  if(key!=NO_KEY){
    
    lcd.setCursor(j,1);
    
    lcd.print(key);
    
    r[i] = key-48;
    i++;
    j++;

    if (j==2)
    {
      lcd.print(":"); j++;
    }
    delay(500);
  }

  if (key == 'D')
  {key=0; break; }
  }
}

Explanation / Answer

#include <DS3231.h>
#include <Servo.h>
#include <LiquidCrystal.h>
#include <Keypad.h>

const byte ROWS = 4; // Four rows
const byte COLS = 4; // Three columns

// Define the Keymap

char keys[ROWS][COLS] = {

{'1','2','3','A'},

{'4','5','6','B'},

{'7','8','9','C'},

{'*','0','#','D'}

};

// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.

byte rowPins[ROWS] = { 2, 3, 4, 5 };

// Connect keypad COL0, COL1 and COL2 to these Arduino pins.

byte colPins[COLS] = { 6, 7, 8, 9 };

// Create the Keypad
Keypad kpd = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

DS3231 rtc(A4, A5);
Servo servo_test; //initialize a servo object for the connected servo  
LiquidCrystal lcd(A0, A1, A2, 11, 12, 13); // Creates an LC object. Parameters: (rs, enable, d4, d5, d6, d7)

//int angle = 0;   
// int potentio = A0; // initialize the A0analog pin for potentiometer
int t1, t2, t3, t4, t5, t6;

boolean feed = true; // condition for alarm

char key;
int r1[6]; //for feed time 1
int r2[6]; // for feed time 2

void setup()
{
servo_test.attach(10); // attach the signal pin of servo to pin9 of arduino
rtc.begin();
lcd.begin(16,2);
servo_test.write(55);
Serial.begin(9600);
pinMode(A0, OUTPUT);
pinMode(A1, OUTPUT);
pinMode(A2, OUTPUT);
  
}

void loop()
{

lcd.setCursor(0,0);
int buttonPress;
buttonPress = digitalRead(A3);

if (buttonPress==1)
setFeedingTime();

lcd.clear();
lcd.setCursor(0,0);
lcd.print("Press A to feed another time");
key = kpd.getKey();

if (key == 'A')
setAnotherFeedingTime();

//Serial.println(buttonPress);

lcd.print("Time: ");
String t = "";
t = rtc.getTimeStr();
t1 = t.charAt(0)-48;
t2 = t.charAt(1)-48;
t3 = t.charAt(3)-48;
t4 = t.charAt(4)-48;
t5 = t.charAt(6)-48;
t6 = t.charAt(7)-48;

lcd.print(rtc.getTimeStr());
lcd.setCursor(0,1);
lcd.print("Date: ");
lcd.print(rtc.getDateStr());

if (t1==r1[0] && t2==r1[1] && t3==r1[2] && t4==r1[3]&& t5<1 && t6<3 && feed==true)
{
servo_test.write(100); //command to rotate the servo to the specified angle
delay(400);
servo_test.write(55);
feed=false;
}

if(t1==r2[0] && t2==r2[1] && t3==r2[2] && t4==r2[3]&& t5<1 && t6<3 && feed==true)
{
servo_test.write(100); //command to rotate the servo to the specified angle
delay(400);
servo_test.write(55);
feed=false;
}
}
}

void setFeedingTime()
{
feed = true;
int i=0;

lcd.clear();
lcd.setCursor(0,0);
lcd.print("Set feeding Time");
lcd.clear();
lcd.print("HH:MM");
lcd.setCursor(0,1);

  
while(1){
key = kpd.getKey();

char j;
  
if(key!=NO_KEY){
  
lcd.setCursor(j,1);
  
lcd.print(key);
  
r1[i] = key-48;
i++;
j++;

if (j==2)
{
lcd.print(":"); j++;
}
delay(500);
}

if (key == 'D')
{key=0; break; }
}
}

void setAnotherFeedingTime()
{
feed = true;
int i=0;

lcd.clear();
lcd.setCursor(0,0);
lcd.print("Set feeding Time 2");
lcd.clear();
lcd.print("HH:MM");
lcd.setCursor(0,1);

  
while(1){
key = kpd.getKey();

char j;
  
if(key!=NO_KEY){
  
lcd.setCursor(j,1);
  
lcd.print(key);
  
r2[i] = key-48;
i++;
j++;

if (j==2)
{
lcd.print(":"); j++;
}
delay(500);
}

if (key == 'D')
{key=0; break; }
}
}

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