💊 Smart Medicine Reminder System

Overview

The Smart Medicine Reminder System is a hands-on embedded systems project built from scratch using an Arduino UNO, DS3231 RTC Module, and a 16×2 I2C LCD Display. Our main focus was on hardware integration — designing a real-world, low-cost healthcare solution that helps users remember their medication schedules through audio-visual alerts.

This project was developed entirely as a team effort, where each member contributed to circuit assembly, component selection, embedded C++ programming, and system testing. Together, we transformed a simple concept into a fully functional hardware prototype that demonstrates practical applications of embedded systems in everyday life.

“This project reflects our passion for building hardware, solving real problems, and working together as a team.”

💡 Why We Built This

Medication non-adherence is a serious global issue, especially among elderly patients. Instead of just simulating a solution, we decided to build a physical, working prototype — because we believe in learning by doing. Every wire, resistor, and line of code was carefully placed to create a system that is:

✅ Practical – Solves a real-world healthcare problem
✅ Affordable – Built with low-cost, easily available components
✅ User-Friendly – Simple buttons and clear LCD feedback
✅ Team-Built – Designed, assembled, and tested collaboratively

🔧 What We Built Together

Component	Our Contribution
Arduino UNO	Programmed and interfaced with all modules
DS3231 RTC	Integrated for accurate real-time clock
16×2 LCD (I2C)	Displayed time, status, and alerts
Buzzer + LED	Added audio and visual alarm signals
Push Buttons	Enabled user input for setting time and stopping alarm

All of these components were carefully assembled on a breadboard, wired according to a custom circuit diagram, and programmed in C++ (Arduino IDE) — with real-time debugging and testing at every step.

Built with ❤️, hardware, and teamwork — because great projects are never built alone.

Problem Statement

Millions of people worldwide forget to take their medication on time, leading to:

⚠️ Worsening of chronic conditions
🏥 Increased hospitalizations
💰 Higher healthcare costs
📉 Reduced quality of life

Our goal was to create a simple, affordable, and effective reminder system that can be used by anyone, anywhere.

Features

Feature	Description
⏰ Real-Time Clock	Displays accurate time using DS3231 RTC Module
🔔 Audio Alert	Piezo buzzer triggers when it's time to take medicine
💡 Visual Alert	LED blinks simultaneously with buzzer
🖥️ LCD Display	Shows current time, set reminder time, and status messages
🔘 Adjustable Timer	Hour and Minute push buttons to set reminder time
🛑 Stop Button	Dismisses the alarm after acknowledgment
🔋 Low Cost	Built with affordable, easily available components
⚡ User-Friendly	Simple interface – anyone can use it without technical knowledge

Components Used

Component	Quantity	Purpose
Arduino UNO	1	Main microcontroller
DS3231 RTC Module	1	Real-time clock for accurate timekeeping
16×2 LCD Display (I2C)	1	Display time, status, and alerts
Piezo Buzzer	1	Audio alert/alarm
LED (Red)	1	Visual alert/alarm
Push Buttons	3	Hour adjustment, Minute adjustment, Stop alarm
Resistors (220Ω)	2	Current limiting for LED and buzzer
Breadboard	1	Circuit assembly
Jumper Wires	Multiple	Connections between components
USB Cable	1	Power and programming

Circuit Diagram


+---------------------------+
| Arduino UNO |
| |
| 5V ---------------------+-----> RTC VCC, LCD VCC, Buzzer VCC
| GND ---------------------+-----> RTC GND, LCD GND, Buzzer GND
| |
| A4 (SDA) --------------> RTC SDA / LCD SDA
| A5 (SCL) --------------> RTC SCL / LCD SCL
| |
| D2 ---------------------> Push Button 1 (Hour +)
| D3 ---------------------> Push Button 2 (Minute +)
| D4 ---------------------> Push Button 3 (Stop Alarm)
| D5 ---------------------> LED (Anode via 220Ω)
| D6 ---------------------> Buzzer (via 220Ω)
| |
+---------------------------+



LCD 16x2 (I2C)
+-----------------+
| VCC ---- 5V |
| GND ---- GND |
| SDA ---- A4 |
| SCL ---- A5 |
+-----------------+


DS3231 RTC
+-----------------+
| VCC ---- 5V |
| GND ---- GND |
| SDA ---- A4 |
| SCL ---- A5 |
+-----------------+



[Buzzer] ---- D6 ---- GND
[LED] ---- D5 ---- GND
[Button1] ---- D2 ---- GND
[Button2] ---- D3 ---- GND
[Button3] ---- D4 ---- GND

Pin Connections

Arduino Pin	Connected To	Notes
5V	RTC VCC, LCD VCC, Buzzer VCC	Power supply
GND	RTC GND, LCD GND, Buzzer GND, LED Cathode, Buttons	Common ground
A4 (SDA)	RTC SDA, LCD SDA	I2C data line
A5 (SCL)	RTC SCL, LCD SCL	I2C clock line
D2	Push Button 1	Increment hours
D3	Push Button 2	Increment minutes
D4	Push Button 3	Stop alarm
D5	LED (via 220Ω)	Visual alert
D6	Buzzer (via 220Ω)	Audio alert

How It Works

System Initialization
- The Arduino boots up and initializes the RTC module and LCD.
- The LCD displays the current time and a default reminder time.
Setting the Reminder Time
- The user presses Hour Button (D2) to increase the hour.
- The user presses Minute Button (D3) to increase the minute.
- The set time is stored and displayed on the LCD.
Real-Time Monitoring
- The system continuously compares the current time (from RTC) with the set reminder time.
Triggering the Alarm
- When the current time matches the set reminder time, the system triggers both audio and visual alerts.
Dismissing the Alarm
- The user presses the Stop Button (D4) to silence the buzzer and turn off the LED.

Arduino Code and Setup

The project is programmed in C++ using the Arduino IDE. Below are complete instructions to get your system up and running.

1. Install Required Libraries

Before uploading the code, you need to install two libraries in the Arduino IDE.

Step-by-step:

Open Arduino IDE on your computer.
Go to Sketch → Include Library → Manage Libraries...
In the search bar, type RTClib.
Find "RTClib by Adafruit" and click Install.
In the search bar, type LiquidCrystal I2C.
Find "LiquidCrystal_I2C by Frank de Brabander" and click Install.
Close the Library Manager window.

2. Connect Your Hardware

Connect the components to your Arduino UNO as per the pin connections table above.

Quick Reference:

Arduino Pin	Connected To
5V	RTC VCC, LCD VCC
GND	RTC GND, LCD GND, Buzzer GND, LED Cathode, Button pins
A4 (SDA)	RTC SDA, LCD SDA
A5 (SCL)	RTC SCL, LCD SCL
D2	Hour Button (other pin to GND)
D3	Minute Button (other pin to GND)
D4	Stop Button (other pin to GND)
D5	LED Anode (via 220Ω resistor)
D6	Buzzer Positive (via 220Ω resistor)

⚠️ Important: Buttons use internal pull-up resistors, so one leg goes to the Arduino pin and the other leg goes to GND. When pressed, the pin reads LOW.

3. Download the Code

The full Arduino code (medicine_reminder.ino) is available in the code/ folder of this repository.
Or copy the code directly from the code/medicine_reminder.ino file.

4. Upload the Code to Arduino

Step-by-step:

Connect your Arduino UNO to your computer using a USB cable.
Open Arduino IDE.
Click File → Open and select the medicine_reminder.ino file.
Go to Tools → Board → select "Arduino Uno".
Go to Tools → Port → select the COM port your Arduino is connected to (e.g., COM3 on Windows or /dev/ttyUSB0 on Linux/Mac).
Click the Upload button (➡️ right arrow icon) in the top left corner.
Wait for the upload to complete. You should see "Done uploading" in the bottom status bar.

5. Set the RTC Time (First Time Only)

The first time you run the system, you need to set the correct time on the RTC module.

Option A: Automatic (Compile Time)

The code is already configured to set the RTC to the time when the sketch was compiled.

Just uncomment this line in setup():

// rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));

Remove the // to enable it, upload once, then comment it again to prevent resetting on every upload.

⏰ Option B: Manual

Replace the line with your current date and time:

rtc.adjust(DateTime(2026, 6, 27, 14, 30, 0));
// Year, Month, Day, Hour, Minute, Second (24-hour format)

Upload once, then comment it out.

🎯 Test the System

The LCD should display "Smart Medicine Reminder System" for 2 seconds, then show the current time and alarm time.
Press the Hour Button (D2) to increase the alarm hour.
Press the Minute Button (D3) to increase the alarm minute.
Set the alarm to 1–2 minutes ahead of the current time.
Wait – when the time matches, the buzzer will sound and the LED will blink.
Press the Stop Button (D4) to dismiss the alarm.

❓ Troubleshooting

Issue	Solution
LCD shows "RTC ERROR!"	Check wiring: SDA → A4, SCL → A5, 5V → VCC, GND → GND
LCD shows nothing/boxes	Change `LCD_ADDRESS` from `0x27` to `0x3F` in the code
Time resets when power is off	The RTC battery (CR2032) is dead – replace it
Buttons not responding	Buttons must connect between the pin and GND (using `INPUT_PULLUP`)
Alarm triggers at wrong time	RTC time is incorrect – re-run the `rtc.adjust()` code
"Library not found" error	Install both required libraries via Library Manager
Upload fails	Check Port selection and USB cable connection

📁 Code File Location

The full code is saved as:

code/medicine_reminder.ino

You can view it directly in this repository or download it to upload to your Arduino.

User Guide

Step	Action	Result
1	Power on the system	LCD shows current time and default reminder
2	Press Hour Button	Hour value increments (0–23)
3	Press Minute Button	Minute value increments (0–59)
4	Wait for set time	System monitors time in background
5	Alarm triggers at set time	Buzzer sounds, LED blinks, LCD alerts
6	Press Stop Button	Alarm stops, system resets to monitoring mode

Team Members

Name	Role	Contributions
Muhammad Umar Afzal	Project Lead / Programmer	LCD integration, buzzer logic, code debugging, system testing, README documentation
Abdul Rehman	Hardware Engineer	Circuit assembly, hardware connections, component selection, soldering
Maheen Rashid	Embedded Developer	RTC module programming, push button logic, I2C communication, documentation

All team members collaborated on testing, troubleshooting, and finalizing the project.

Technologies & Tools

Category	Technologies
Microcontroller	Arduino UNO (ATmega328P)
Programming Language	C++ (Arduino IDE)
Communication Protocol	I2C (for RTC and LCD)
RTC Module	DS3231 (High-precision real-time clock)
Display	16×2 LCD with I2C backpack
Version Control	Git & GitHub
Documentation	Markdown (`README.md`)

Project Photos

🔧

🖼️

🔬

📺

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Future Improvements

Add a buzzer snooze function – Allow user to snooze the alarm for 5 minutes.
Multiple medication times – Support up to 3 different reminder times.
Wireless connectivity – Integrate ESP8266 for IoT notifications via mobile app.
OLED display upgrade – Replace LCD with OLED for better visibility.
Battery backup – Add battery so the RTC retains time even when unplugged.
Voice alerts – Add a speaker module for voice-based reminders.
Mobile app integration – Send push notifications to mobile phones.
Data logging – Log missed/acknowledged reminders to SD card.

License

This project is licensed under the MIT License – you are free to use, modify, and distribute it for personal or commercial purposes. See the LICENSE file for details.

MIT License

Copyright (c) 2026 Muhammad Umar Afzal, [Friend 1 Full Name], [Friend 2 Full Name]

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Contact

For questions, suggestions, or collaboration, feel free to reach out:

Muhammad Umar Afzal

Maheen Rashid

Abdul Rehman

LinkedIn

Support

If you found this project helpful:

⭐ Star this repository on GitHub
🔄 Share it with your network
💬 Leave a comment or feedback

🤝 Built with Teamwork & Passion

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images		images
LICENSE		LICENSE
README.md		README.md

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