#include <Wire.h>
#include <RTClib.h>
RTC_DS3231 rtc;
char startChar = '*';
char endChar = '#';
char slots[4][6] = {"", "", "", ""}; // 4 slots as 2D array
int leds[4] = {12, 11, 10, 9};       // LED pins
int buzzer = 8;

String incomingData = "";
int commas[5]; // to store comma positions

void setup() 
{
  Serial.begin(9600);
    Serial.println("HELLO");
      rtc.begin();
                               
                                 for (int i = 0; i < 4; i++) 
                                   {
                                       pinMode(leds[i], OUTPUT);
                                         }
                                           pinMode(buzzer, OUTPUT);
                                           }

                                           void loop() 
                                           {
                                             DateTime now = rtc.now();
                                               char currenttime[6];  
                                                 sprintf(currenttime, "%02d:%02d", now.hour(), now.minute());
                                                   Serial.println(currenttime);

                                                     if (Serial.available() > 0) 
                                                       {
                                                           incomingData = Serial.readStringUntil(endChar);
                                                               if (incomingData[0] == startChar) 
                                                                   {
                                                                         // Directly use commas[i]
                                                                               for (int i = 0; i < 5; i++) 
                                                                                     {
                                                                                             commas[i] = incomingData.indexOf(',', (i == 0) ? 1 : commas[i - 1] + 1);
                                                                                                   }

                                                                                                         // Extract and store slot values
                                                                                                               for (int i = 0; i < 4; i++) 
                                                                                                                     {
                                                                                                                             incomingData.substring(commas[i] + 1, commas[i + 1]).toCharArray(slots[i], 6);
                                                                                                                                   }

                                                                                                                                         Serial.println("Separated Values:");
                                                                                                                                               for (int i = 0; i < 4; i++) 
                                                                                                                                                     {
                                                                                                                                                             Serial.print("SLOT ");
                                                                                                                                                                     Serial.print(i + 1);
                                                                                                                                                                             Serial.print(": ");
                                                                                                                                                                                     Serial.println(slots[i]);
                                                                                                                                                                                           }
                                                                                                                                                                                               }
                                                                                                                                                                                                 }

                                                                                                                                                                                                   // Check each slot
                                                                                                                                                                                                     for (int i = 0; i < 4; i++) 
                                                                                                                                                                                                       {
                                                                                                                                                                                                           if (strcmp(slots[i], currenttime) == 0) 
                                                                                                                                                                                                               {
                                                                                                                                                                                                                     digitalWrite(leds[i], HIGH);
                                                                                                                                                                                                                           digitalWrite(buzzer, HIGH);
                                                                                                                                                                                                                                 delay(1500);
                                                                                                                                                                                                                                       digitalWrite(leds[i], LOW);
                                                                                                                                                                                                                                             digitalWrite(buzzer, LOW);
                                                                                                                                                                                                                                                 }
                                                                                                                                                                                                                                                   }

                                                                                                                                                                                                                                                     delay(200);
                                                                                                                                                                                                                                                     }