Build a Wireless HVAC Performance Monitor with ESP32 and DHT22 - No WiFi Router Needed

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

Monitor an air conditioner's output or a room's climate without running cables or signing into a WiFi network. This kit turns two ESP32 boards into a direct, peer-to-peer wireless sensor link - one reads temperature and humidity from a DHT22, the other shows live readings on an OLED display, all using the ESP-NOW protocol. Perfect for a school science project, an ATL Tinkering Lab demonstration, or a first step into communication and networking.

What You'll Build

You'll assemble two independent modules: a sensor node that captures real-time temperature and humidity data, and a display node that receives that data wirelessly. The 0.96-inch OLED screen updates every few seconds, showing HVAC performance at a glance. There's no router, no cloud, and no coding of network credentials - just a clean, local data link that works across rooms.

What You'll Learn

• How to use ESP-NOW for low-power, peer-to-peer wireless communication between two microcontrollers
• Interfacing a DHT22 digital temperature and humidity sensor with the ESP32
• Driving an I2C OLED display to show real-time sensor data
• Basic circuit wiring on a breadboard, including pull-up resistors for stable digital signals

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for school students in CBSE classes 6-12, ATL Tinkering Lab members, and young hobbyists exploring wireless sensor networks. The beginner-friendly wiring and ready-to-upload code make it an ideal hands-on project for a science exhibition, a first B.Tech ECE mini-project, or a home experiment that shows how real HVAC monitoring works without being tethered to a router. Even a 10-year-old with basic computer skills can complete the build in an afternoon.

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.