Week #7-Journal 

 part-1: 1Initialization & Setup (Setting Up Components)

This part initializes the LCD, buzzer, LED, and button. It also displays startup messages on the LCD.

1-Include Libraries

• Wire.h: Enables I2C communication.

• LiquidCrystal_I2C.h: Controls the LCD via I2C.

2-Define LCD Display

• Uses address 0x27 for a 16×2 LCD.

3-Define Pin Constants

• buzzerPin = 8 → Controls the buzzer.

• ledPin = 9 → Controls the LED.

• buttonPin = 7 → Input button.

4-Time and Logic Variables

• previousMillis = 0 → Tracks time using millis().

• interval = 6000 → Reminder interval (6 seconds).

• alarmActive and alarmTriggered → Manage alarm states.

5-Setup Function (setup)

• Set buzzerPin and ledPin as OUTPUT.

• Set buttonPin as INPUT with internal PULLUP resistor.

6-Initialize LCD Display

• Turn on backlight and clear screen.

• Display messages sequentially:

  1. "Medicine Reminder" (waits 3 seconds).

  2. "Your Health" (waits 3 seconds).

  3. "Is Matter" (waits 3 seconds).

part2-:Main Loop (Handling Timing & Alarm Activation)

This part continuously checks if the set interval has passed, triggering the alarm accordingly. It also listens for a button press to stop the alarm.

Uses millis() to check if 6 seconds have passed.

If so, it triggers the alarm.

If the button is pressed, it stops the alarm and displays the next dose reminder.

Track Time Continuously

• currentMillis = millis(); → Stores the current time in milliseconds.

Check if the Reminder Interval Has Passed

• if (!alarmTriggered && currentMillis - previousMillis >= interval) {

  • Ensures the alarm is not already triggered.

  • Checks if the set interval (6 seconds) has passed.

  • Actions:

    • Reset previousMillis to currentMillis.

    • Call triggerAlarm(); to activate the alarm.

    • Set alarmTriggered = true; to indicate the alarm is active.

Check if the Button is Pressed to Stop the Alarm

• if (digitalRead(buttonPin) == LOW && alarmTriggered) {

  • Detects if the button is pressed (LOW state).

  • Ensures the alarm was triggered.

  • Actions:

    • Call deactivate Alarm(); to stop the alarm.

    • Call showNextDoseMessage(); to display the next reminder.

    • Reset alarmTriggered = false; to allow the next cycle.

    • Reset previousMillis = millis(); to start timing for the next reminder.