Project Hub /IoT & Connected Devices/Environmental & Weather Monitoring/Real-Time Temperature and Humidity Monitoring Webserver with Raspberry Pi Pico W and DHT11 Sensor

Intermediate

RASPBERRY PI

₹500 – ₹1,500

3 – 6 Hours

Partial Kit

Real-Time Temperature and Humidity Monitoring Webserver with Raspberry Pi Pico W and DHT11 Sensor

Learn how to build a real-time environmental monitoring web server using a Raspberry Pi Pico W and a DHT11 temperature and humidity sensor.

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.

Raspberry Pi 3 - Model B+ 1.4Ghz 64-bit quad-core Processor with 1 GB Ram (Original) Rs. 9,810.00
Cable for Arduino Nano (USB 2.0 A to USB 2.0 Mini B) 30cm Rs. 69.00
DHT11 Temperature and Humidity Sensor Module for Arduino Raspberry Pi Rs. 243.00
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: Temperature Sensor (generic)

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How It Works

This project establishes an embedded web server by leveraging the onboard wireless capabilities of the Raspberry Pi Pico W microcontroller. The core of the system relies on the DHT11 sensor, which uses a capacitive humidity sensor and a thermistor to measure the surrounding air, converting these physical environmental factors into calibrated digital signals. Connected via jumper wires on a mini breadboard, the DHT11 communicates its raw temperature and relative humidity readings to the Pico W's digital general-purpose input/output pins. Powered through a standard USB cable, the Pico W runs a MicroPython script utilizing the dht.py library to periodically poll the sensor data. When a user connects to the Pico W's hosted web server over a local network using a web browser, the main.py script dynamically generates an HTTP response containing the latest sensor metrics. The browser then renders this information in real-time, effectively transforming a modest microcontroller setup into a functional, network-accessible Internet of Things weather station.

Why Build This

Design lightweight, network-accessible IoT web servers directly on a microcontroller for localized data visualization.

Interface digital environmental sensors with embedded hardware using MicroPython libraries for real-time data acquisition.

Prototype practical smart-room climate monitoring nodes suitable for deployment in automated greenhouses or academic research.

Real-World Application

Smart home environmental monitoring, greenhouses, indoor climate tracking, and educational IoT weather stations.

Skills You'll Learn

MicroPython firmware deployment

GPIO digital sensor interfacing

embedded web server hosting

HTTP protocol handling

sensor data parsing

Safety Precautions

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

Technology Tags

MICROPYTHON

WI-FI

WEB SERVER

IOT

DHT11

SENSORS

ENVIRONMENTAL MONITORING

THONNY IDE

Frequently Asked Questions

Can I use a different sensor, like the DHT22, with this exact code?

Yes, but you may need to adjust the library initialization or scaling factors in your MicroPython script, as the DHT22 has a different precision and communication timing than the DHT11.

How does the web server get accessed if the Pico W doesn't have a screen?

The Pico W connects to your local Wi-Fi network and is assigned a local IP address, which you type into any web browser connected to the same network to view the interface.

Do I need an internet connection to run this web server?

No external internet connection is required; the server runs locally on your internal Wi-Fi network, communicating directly between your device and the Pico W.

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-00807