HVAC Performance Monitor Plus Kit – Build an Arduino-Based Multi-Level Menu System with DHT22

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

Transform a bare Arduino Uno into a professional HVAC monitor with a crisp 16×2 LCD display, five tactile buttons, and a DHT22 temperature-humidity sensor. This kit teaches you to design and code multi-level menus from scratch — an invaluable skill you can drop into any future project, from home automation panels to robotics dashboards.

What You'll Build

You'll assemble a working environmental monitor that reads temperature and humidity, displays values on an I2C-controlled LCD, and lets you navigate through settings screens using five tactile buttons. The relay output can control a fan, heater, or dehumidifier based on thresholds you configure right from the menu. This isn't a one-time toy — the menu code is structured for re-use, so you can transplant it into other creations like an incubator controller or a smart irrigation unit.

What You'll Learn

• Interface a DHT22 digital sensor and parse its data stream accurately
• Drive a 16×2 LCD using an I2C backpack, reducing wiring to just four connections
• Implement robust button debouncing and a non-blocking state machine for 5-button navigation
• Design a hierarchical menu system with levels for main display, settings, thresholds, and relay control
• Write modular, re-usable C++ code that can be adapted to other sensors or displays
• Integrate a 5V relay module to switch high-power loads safely

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This intermediate project is ideal for CBSE Class 11-12 students building practical electronics portfolios, B.Tech ECE/EEE freshmen tackling microcontroller labs, and participants in Smart India Hackathon or ATL Tinkering Lab challenges who need a ready-to-assemble HVAC module. If you’re at an IIT, NIT, VIT, or BITS campus and want to move beyond blinking LEDs, this kit gives you a hardware-software foundation you can reuse in capstone projects.

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.