Project Hub /Audio Displays & Interactive Media/LED Matrix & Cube Displays/How to Build an IoT-based Weather Monitoring System Using Arduino

Beginner

ARDUINO

₹1,500 – ₹5,000

3 – 6 Hours

Partial Kit

How to Build an IoT-based Weather Monitoring System Using Arduino

Build a real-time IoT weather station using an Arduino UNO R4 WiFi and multiple environmental sensors to serve a local web dashboard without third-party cloud dependencies.

Originally published on CircuitDigest

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.

GY-BMP280-3.3 HIGH PRECISION ATMOSPHERIC PRESSURE SENSOR MODULE Rs. 69.00
DHT11 Temperature and Humidity Sensor Module for Arduino Raspberry Pi Rs. 89.00
Raindrops Detection Sensor Module Rs. 115.00
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
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: Arduino Uno R4 / Minima
MQ-135 / other MQ Gas Sensor

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How It Works

This IoT-based weather monitoring system centers around the Arduino UNO R4 WiFi, which serves as the core processing and network communication hub. Environmental parameters are gathered through a suite of wired peripherals: the DHT11 sensor measures ambient temperature and relative humidity, the BMP180 sensor tracks barometric pressure via the I2C interface, the MQ135 sensor detects various air quality gases, and a specialized rain sensor module identifies precipitation levels. These sensors are interconnected with the microcontroller using a breadboard and connecting wires to distribute power and signal lines. Once the Arduino UNO R4 collects the raw analog and digital data from these inputs, its onboard microcontroller processes the signals. Utilizing its integrated Wi-Fi capabilities and the WiFiS3 software library, the board can host a local web-based dashboard directly accessible on your network. This eliminates the need for any external third-party cloud services. Additionally, the system can leverage the Arduino_LED_Matrix to display visual indicators or status outputs locally, giving users immediate feedback on current environmental conditions right at the hardware level while simultaneously serving data to the local browser interface.

Why Build This

Design and deploy an independent local web dashboard using an Arduino microcontroller without relying on third-party cloud services or recurring subscription fees.

Integrate multiple heterogeneous sensors—measuring temperature, humidity, pressure, gas, and precipitation—into a single synchronized embedded system.

Apply embedded networking principles suitable for undergraduate engineering projects involving smart homes, greenhouses, and localized environmental tracking.

Real-World Application

Smart home climate tracking, indoor air quality monitoring, greenhouse management, and local weather forecasting.

Skills You'll Learn

I2C communication protocol

analog-to-digital signal conversion

sensor data acquisition

local web server hosting on microcontrollers

GPIO interfacing

environmental monitoring

Safety Precautions

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

Technology Tags

ARDUINO

IOT

WI-FI

WEB SERVER

SENSORS

BMP180

DHT11

MQ135

RAIN SENSOR

EMBEDDED C++

Frequently Asked Questions

Can I access the weather dashboard from outside my home network?

By default, the Arduino UNO R4 WiFi hosts a local web server on your internal network, meaning it is accessible only to devices connected to the same local network unless you configure advanced router port forwarding.

Do I need an internet connection for this project to work?

An external internet connection is not required because the system creates a local web dashboard served directly from the Arduino over your local Wi-Fi network.

How do I install the required software libraries like Adafruit BMP085 and DHT Sensor Library?

You can easily install all required dependencies directly within the Arduino IDE by navigating to Tools > Manage Libraries and searching for each specific library name.

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-01186