Build an Automatic Smart City Air Purifier Control Node with Arduino Uno & PMS5003 Sensor

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 compact PM2.5 air quality monitoring node that automatically switches on an air purifier when the air gets polluted - turning it off once the air is clean again. This project mirrors real-world Smart City environmental management systems used in urban air quality networks across India, giving you hands-on experience with sensor integration, automation logic, and practical IoT fundamentals.

What You'll Build

You'll assemble a self-contained module that reads PM2.5 concentration from a PMS5003 sensor, displays the current value on a bright OLED screen, and triggers a relay to control a connected air purifier. When the AQI exceeds a safe threshold, the relay closes to turn the purifier on; once PM2.5 drops below the limit, it turns off automatically. The node runs standalone on a 9V battery and can be placed in any room for continuous monitoring.

What You'll Learn

• Interfacing a laser-based particle sensor (PMS5003) with Arduino Uno via UART
• Programming threshold-based automation logic using real-time air quality data
• Safely controlling mains-powered appliances through a relay module with flyback protection
• Integrating an OLED display to show live PM2.5 readings and system status

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for CBSE Class 11-12 students working on physics or computer science projects, first-year B.Tech ECE/EEE students exploring IoT automation, Smart India Hackathon teams needing air quality monitoring prototypes, and ATL Tinkering Lab mentors guiding hands-on electronics. If you can connect components on a breadboard and load an Arduino sketch, you're ready.

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.