**Medication Reminder** rev_01

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    - Project: **Medication Reminder**
    - Source Code NOT compiled for: ESP8266 NodeMCU V1.0
    - Source Code created on: 2025-04-14 11:04:03

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Display reminder for pill at 4:40 pm ist via rtc */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <EasyButton.h> //https://github.com/evert-arias/EasyButton
#include <Wire.h>
#include <RTClib.h>
#include <LiquidCrystal_I2C.h>

// Initialize RTC and LCD
RTC_DS3231 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address may be 0x3F on some LCDs

// Medicine info
String medicines[4] = {"Paracetamol", "Vitamin C", "Antibiotic", "Painkiller"};
int reminderHours[4] = {16}; // Reminder set for 4 PM (16:00 in 24hr format)
int reminderMinutes[4] = {40}; // Reminder set for 40 minutes past the hour

// Other components
const int ledPin = 14;   // D5 on NodeMCU (Change pin if needed)
const int buzzerPin = 0; // D3 on NodeMCU
const int buttonPin = 2; // D4 on NodeMCU

// Flag to track reminders
bool alertTriggered[4] = {false, false, false, false};
unsigned long lastDisplayUpdate = 0;

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t Button_PushButton_PIN_D1      = 1; // This pin is not used in the USER CODE

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/

void setup(void)
{
    // put your setup code here, to run once:
    Serial.begin(9600);
    Wire.begin();
    rtc.begin();
    lcd.begin(16, 2);  // Corrected begin with cols and rows
    lcd.backlight();

    // Setup output pins
    pinMode(ledPin, OUTPUT);
    digitalWrite(ledPin, LOW);

    pinMode(buzzerPin, OUTPUT);
    pinMode(buttonPin, INPUT_PULLUP);

    lcd.setCursor(0, 0);
    lcd.print("  Pill Time Boot ");
    delay(2000);
    lcd.clear();

    pinMode(Button_PushButton_PIN_D1, INPUT_PULLUP); // Keep this for compatibility with EasyButton
}

void loop(void)
{
    DateTime now = rtc.now();

    // Update time display every second
    if (millis() - lastDisplayUpdate >= 1000) {
        showTime(now);
        lastDisplayUpdate = millis();
    }

    // Check reminders
    for (int i = 0; i < 4; i++) {
        if (now.hour() == reminderHours[i] && now.minute() == reminderMinutes[i] && !alertTriggered[i]) {
            triggerReminder(i);
            alertTriggered[i] = true;
        }

        // Reset trigger for next day
        if (now.hour() != reminderHours[i] || now.minute() != reminderMinutes[i]) {
            alertTriggered[i] = false;
        }
    }

    delay(100);
}

void showTime(DateTime now) {
    char timeBuffer[9];
    sprintf(timeBuffer, "%02d:%02d:%02d", now.hour(), now.minute(), now.second());

    lcd.setCursor(0, 0);
    lcd.print("Time: ");
    lcd.print(timeBuffer);
    lcd.print("  "); // Padding
}

void triggerReminder(int index) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Take: ");
    lcd.print(medicines[index].substring(0, 10)); // Fit name in LCD
    digitalWrite(ledPin, HIGH);  // Turn on LED
    tone(buzzerPin, 1000);

    // Wait for pushbutton acknowledgment
    while (digitalRead(buttonPin) == HIGH) {
        delay(100);
    }

    // Acknowledged
    noTone(buzzerPin);
    digitalWrite(ledPin, LOW);  // Turn off LED

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print(medicines[index]);
    lcd.setCursor(0, 1);
    lcd.print("Taken ✔");
    delay(2000);
    lcd.clear();
}

/* END CODE */