Project Hub /Healthcare Biomedical & Assistive/Assistive & Prosthetic Tech/Ouma Ria Smart Clock

Intermediate

ESP32

Project Specific

1 – 2 Days

Partial Kit

Ouma Ria Smart Clock

An ESP32-based smart clock built for medication reminders, home security monitoring, and voice announcements.

Originally published on Hackaday.io

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

ESP32 WiFi+Bluetooth CP2102 Development Board Rs. 520.00
MAX7219-4 Dot Matrix LED Display Module – 4-in-1 Cascaded Panel Rs. 698.00
LDR Light Sensor Module Rs. 49.00
PIR Motion Detector Sensor Module HC-SR501 Rs. 95.00
2-Slot 18650 Holder with Protective Cover and On/Off Switch – Case Rs. 109.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: Battery (generic / unspecified)
LED Strip / NeoPixel / WS2812
RTC Module DS3231 / DS1307
Speaker / Audio Amplifier
Transistors (BC547 / 2N2222 / TIP / MOSFET)

Browse all components

How It Works

The Ouma Ria Smart Clock is orchestrated by an ESP32 microcontroller, which coordinates timekeeping, environmental sensing, user inputs, and output peripherals. Accurate time is maintained via the DS3231 real-time clock module communicating over I2C, ensuring reliable tracking of daily schedules. Visual output is driven by four WS2812B 8x8 LED panels totaling 256 pixels, alongside a 30-LED status strip, which together render time, notifications, and visual cues. Ambient lighting conditions are measured by the BH1750 sensor, allowing the system to dynamically adjust display brightness. Audio feedback and voice announcements are handled by the DFPlayer Mini module paired with an onboard speaker. User interactions are captured through a twelve-button front panel, while physical presence and security monitoring are managed by up to five AM312 passive infrared (PIR) sensors. Power management is handled by a 12V supply featuring battery backup to maintain continuous operation during outages, and an IRLZ44N MOSFET is utilized to safely switch higher-power output components such as a siren or external alarm.

Why Build This

Develop practical assistive technology systems tailored for elderly care and independent living support.

Integrate complex multi-sensor arrays and high-density addressable LED matrices with an IoT-capable microcontroller.

Implement robust power management architectures incorporating battery backups and MOSFET-driven load switching.

Real-World Application

Assistive technology and elderly care, helping patients manage daily medication schedules, medical appointments, kitchen timing, and home security.

Skills You'll Learn

I2C sensor integration

addressable LED matrix control

audio module interfacing

digital input debouncing

MOSFET load switching

power backup system integration

Safety Precautions

Ensure proper handling of the 12V power supply with battery backup and correct wiring of the MOSFET siren/alarm output.

Technology Tags

ESP32

WS2812B

DS3231 RTC

BH1750

DFPLAYER MINI

AM312 PIR

IOT

HOME AUTOMATION

SMART CLOCK

WEB INTERFACE

Frequently Asked Questions

Why is an ESP32 chosen over a standard Arduino for this project?

The ESP32 provides ample processing power, memory, and general-purpose I/O pins required to simultaneously manage high-density addressable LEDs, multiple PIR sensors, real-time clock data, and audio playback.

How do the BH1750 sensor and LED panels work together?

The BH1750 measures the ambient light level in the room, enabling the microcontroller to automatically dim or brighten the 256-pixel WS2812B display for optimal readability day and night.

What is the role of the IRLZ44N MOSFET in the circuit?

The IRLZ44N acts as an electronic switch controlled by the ESP32, allowing the low-voltage logic board to safely control higher-current peripheral devices like a siren or security alarm.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-01625