HVAC Performance Monitor Kit with ESP32 + DHT22 v11
ESP32 HVAC Performance Monitor Kit — Create a 4-Node BLE Sensor Network for MQTT Climate Monitoring
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Turn your curiosity about IoT into a functional multi-room climate monitoring system. This kit gives you everything to build four battery-powered DHT22 sensor tags that stream temperature and humidity over BLE to a central ESP32-C3 gateway, which then pushes the data to any MQTT broker via WiFi. Use it to map HVAC performance, detect hot spots in a server room, or create a real-time dashboard for your college lab.
What You'll Build
You’ll solder and assemble four compact sensor nodes, each housed in an ABS enclosure with its own LiPo battery and charging circuit. These nodes sleep between readings and wake to broadcast BLE advertisements, consumed by the gateway ESP32. The gateway decodes all four data streams and publishes to MQTT topics, ready for Node-RED, Home Assistant, or cloud dashboards. The result is a deployable wireless sensor network you can place in different rooms the same day you finish building.
What You'll Learn
- BLE advertisement scanning and data extraction on ESP32-C3
- MQTT messaging over WiFi with QoS and topic structuring
- Battery management and deep sleep scheduling for months-long operation
- Soldering small modules and assembling field-ready enclosures
Kit Contents
| Component | Quantity |
|---|---|
| ESP32-C3 Super Mini | 5 |
| DHT22 | 4 |
| 3.7V LiPo 500mAh | 4 |
| TP4056 Module | 4 |
| 10kΩ Resistors | 15 |
| ABS Enclosure Box | 5 |
| PCB Prototype Board | 5 |
| Micro USB Cable | 5 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
It matches the skills of CBSE Class 11-12 students building IoT science exhibits, B.Tech ECE second-year learners tackling wireless sensor networking, and Smart India Hackathon teams prototyping environmental monitoring solutions. ATL Tinkering Labs will find it a complete intermediate project with all tools included.
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.
What if I get stuck during the build?
Open the AI companion from the QR code, describe your issue, and get step-specific help. You can also message us on WhatsApp with photos of your setup and we will reply within hours.
Do I need to code everything from scratch?
The AI companion provides tested firmware for both the sensor tags and gateway. You only need to configure your WiFi and MQTT broker details.
Can I use my own MQTT broker or cloud service?
Yes. The gateway connects to any standard MQTT server like Mosquitto, HiveMQ, or AWS IoT Core. The companion includes sample Node-RED flows to visualize the data.
How long will the battery last on each sensor node?
With the provided 500mAh LiPo and deep sleep between 5-minute readings, a single charge can last over a month. You can adjust the reporting interval in the firmware.
HVAC — Four ESP32-C3 sensor tags send BLE data to one ESP32-C3 gateway which posts all to MQTT over WiFi.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items