HVAC Monitor Kit: Build a BLE-to-MQTT Sensor Network with ESP32

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

With this Compoden kit, you'll transform three ESP32 dev boards into a working HVAC performance monitor. Two boards act as BLE peripheral sensor nodes, each equipped with a DHT22 temperature-humidity sensor, while a third ESP32 serves as the central gateway. This central ESP scans for BLE advertisements, collects the environmental data, and publishes it to a WiFi-connected MQTT broker-just like a commercial building automation system. Perfect for learning how real-world wireless sensor networks share data over the internet.

What You'll Build

By the end of this 4-5 hour build, you'll have a fully functional wireless sensor network. The DHT22 nodes transmit real-time air temperature and humidity readings, and the MPU6050 vibration sensor helps detect HVAC equipment issues. The central ESP32 packages all data into MQTT topics, ready to be displayed on a dashboard with tools like Node-RED or Blynk. This multi-node system mirrors the architecture used in energy management for offices and factories.

What You'll Learn

• Setting up an ESP32 as a BLE central and MQTT client simultaneously
• Configuring multiple DHT22 sensors for accurate temperature/humidity reading over wireless BLE
• Integrating a MPU6050 accelerometer to detect HVAC unit vibrations and anomalies
• Designing an IoT data pipeline from edge devices to cloud dashboards using MQTT

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11-12 students working on IoT-based physics projects, B.Tech ECE/EEE students tackling Smart India Hackathon challenges on energy monitoring, and ATL Tinkering Lab mentors seeking a ready-to-build wireless sensor network. It's also a strong choice for IIT/NIT/VIT/BITS students building communication protocols projects and for anyone prototyping a scalable HVAC analytics system.

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.