Automate Humidity & CO2 for Maximum Yield

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

Oyster and button mushrooms require precise environmental triggers to shift from mycelium to fruiting bodies. With this kit, you'll build a controller that reads DHT22 humidity/temperature and MH-Z19B CO2 levels, then switches on a humidifier relay when humidity dips below 85% and activates a fan relay when CO2 exceeds 800 ppm. This is a hands-on automation project for school biology labs, B.Tech agriculture majors, or your own small-scale mushroom farm.

What You'll Build

A complete Arduino-based environmental controller for mushroom fruiting chambers. The system displays real-time sensor data on an OLED screen and uses two 5V relays to independently control a humidifier and exhaust fan. You'll calibrate trigger thresholds to maintain 80-90% humidity and keep CO2 under 1000 ppm - exactly what oyster and button mushrooms need to initiate pin formation and grow healthy fruiting bodies.

What You'll Learn

• Interface DHT22 digital humidity sensor and capture precise readings with less than 2% error
• Interrogate the MH-Z19B NDIR CO2 sensor over serial to measure carbon dioxide in real time
• Implement hysteresis logic to avoid relay chattering when sensor values hover near thresholds
• Protect relay coils with flyback diodes and filter noise with capacitors for reliable field operation

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11-12 students exploring controlled-environment agriculture, B.Tech ECE & EEE students building IoT-based smart farming prototypes for hackathons like Smart India Hackathon, and ATL lab instructors demonstrating sensor-actuator loops. If you're pursuing an agriculture automation project at IIT, NIT, VIT, or BITS, this kit gives you a pre-validated hardware stack that works right out of the box, so you can focus on code and growing mushrooms.

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.