Project Hub /IoT & Connected Devices/Smart Energy / Water Metering/Smart Water Meter To Help Control Water Wastage

Intermediate

ARDUINO

Project Specific

3 – 6 Hours

Partial Kit

Smart Water Meter To Help Control Water Wastage

This project features a smart water meter that measures daily water usage and feeds live data to a smartphone via Bluetooth connected to a database.

Originally published on ElectronicsForU

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
Arduino UNO R3 Board (Compatible) – ATmega328P Microcontroller with USB Cable Rs. 999.00
0.96 Inch I2C/IIC 4pin OLED Display Module White Rs. 349.00
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: Water Flow Sensor
Arduino Pro Mini
Pipes / Tubing / Hose / Fittings
Header Pins / Terminals / Connectors

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How It Works

The Smart Water Meter system operates by placing a water flow sensor directly into the path of a water pipe connected to a water tap. As water flows through the pipe, the sensor's internal turbine rotates, generating electrical pulses proportional to the liquid's velocity and volume. These pulses are read and processed by an Arduino Pro Mini microcontroller running a specialized FlowMeter Arduino Library to calculate precise cumulative water usage. The real-time consumption data is then output locally onto a compact OLED SSD1306 display using I2C communication so users can read metrics directly at the pipe. Simultaneously, an HC-05 Bluetooth module wirelessly transmits this live usage data to an Android smartphone running a custom application built via MIT App Inventor. This mobile interface allows users to remotely monitor consumption trends, helping them track daily usage patterns and identify potential water waste or leaks. Programming and firmware updates for the Arduino Pro Mini are handled via an Arduino Uno or an FTDI USB-UART adapter during the initial setup phase, ensuring the system reliably captures, displays, and transmits flow metrics.

Why Build This

Design and deploy an end-to-end IoT monitoring solution for municipal water conservation and leakage detection.

Integrate microcontroller firmware, local I2C display drivers, and wireless serial communication into a cohesive engineering prototype.

Develop custom mobile software interfaces using MIT App Inventor to interface directly with hardware sensors via Bluetooth.

Real-World Application

Water resource management in residential buildings, smart cities, and drought-prone areas to monitor consumption and detect leaks or excessive wastage.

Skills You'll Learn

Microcontroller programming

I2C communication protocol

wireless serial communication via Bluetooth

sensor signal processing

mobile app development

Safety Precautions

No specific precautions noted for this build — always follow general electronics safety practices.

Technology Tags

ARDUINO

BLUETOOTH

OLED

MIT APP INVENTOR

MOBILE APP DEVELOPMENT

SENSORS

WATER FLOW METER

IOT

DATABASE

Frequently Asked Questions

Can I use an Arduino Uno instead of an Arduino Pro Mini for the final installation?

Yes, an Arduino Uno can be used for both programming and the final build, though the Pro Mini is typically chosen for its smaller physical footprint in permanent plumbing installations.

How does the Android smartphone receive data from the Arduino?

The HC-05 Bluetooth module paired with the microcontroller wirelessly transmits the processed flow data to a custom Android application built using MIT App Inventor.

What libraries are required to make the display and flow sensor work?

You will need the FlowMeter Arduino Library to interpret the sensor pulses and the OakOLED SSD1306 Library to drive the OLED display.

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.

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