Automated Greenhouse Fan Kit: Arduino Uno Controls DHT22 & CO2 for Ideal Growing Conditions

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

Build a smart ventilation system that protects your plants from heat stress, high humidity, and CO2 buildup. Using real-time data from the DHT22 and MH-Z19B sensors, this project automatically activates an exhaust fan via a relay module when conditions exceed your set thresholds. Whether for a school greenhouse, polyhouse, or a home growing setup, you’ll create a reliable climate controller that mirrors commercial automation.

What You'll Build

A fully automated greenhouse fan controller that reads temperature, humidity, and CO₂ levels, displays them on an LCD screen, and switches on a fan when thresholds are breached. You’ll have a working prototype on a breadboard that can be permanently installed to manage ventilation in small to medium-sized greenhouses.

What You'll Learn

• Interfacing digital and analog sensors (DHT22 temperature/humidity, MH-Z19B CO₂) with Arduino
• Controlling high-power devices using a relay module safely (adding flyback diodes)
• Displaying sensor data on a 16x2 LCD with an I2C backpack for simplified wiring
• Writing conditional logic in Arduino code to implement threshold-based automation

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11–12 students building integrated sensor projects, B.Tech ECE/EEE students working on greenhouse automation mini-projects, and ATL Tinkering Lab participants exploring environmental monitoring. Also suitable for hobbyists entering smart agriculture and home growers wanting a reliable automation prototype.

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.