Arduino-Powered Greenhouse Humidity Monitor with Automatic Exhaust Fan Control

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Step into your greenhouse and find the air perfectly balanced—no dampness, no mould—thanks to a monitor you built. This kit lets you construct a humidity-controlled exhaust system that automatically kicks on when moisture rises, then shuts off once the air is dry. With an Arduino Uno, DHT22 sensor, relay module, and an OLED display, you’ll create a climate watchdog that keeps plants thriving.

What You'll Build

You’ll assemble a self-contained climate station that reads temperature and humidity from the DHT22 sensor, displays readings on a 0.96-inch OLED, and uses a DS3231 real-time clock to timestamp logs. When humidity exceeds a preset threshold—like after watering—the relay energises a connected exhaust fan; once humidity drops, the relay cuts power automatically. Mount it inside your greenhouse wall, add a 9V battery or USB power, and watch it work hands-off.

What You'll Learn

• Calibrating a DHT22 digital humidity sensor and reading temperature/humidity values in code
• Writing Arduino logic to activate a 5V relay when humidity crosses a set limit
• Displaying live sensor data and timestamp on an I2C OLED using the U8g2 library
• Assembling a low-power embedded system with decoupling capacitors and flyback diode protection

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is designed for Class 11–12 science students exploring embedded systems, first-year B.Tech ECE/EEE learners building climate control projects, and ATL Tinkering Lab mentors seeking a ready-to-assemble automation project. It’s also a solid build for Smart India Hackathon teams prototyping a smart greenhouse IoT edge node.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We’ve spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.