ESP32-C3 Compact MQTT Gateway Kit with ESP32 + DHT22
ESP32-C3 MQTT Gateway Kit: Build a 4-Node BLE Sensor Mesh with MQTT Dashboard
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine a network of tiny wireless temperature-and-humidity sensors placed around your home, lab, or greenhouse, all feeding data to a single compact gateway that sends everything to an MQTT dashboard you control. This kit makes that vision a reality with four ESP32-C3 sensor tags, each equipped with a DHT22, and a central ESP32-C3 gateway that bridges BLE to WiFi/MQTT. Built for makers who need a deployable sensor network in the smallest possible form factor, it turns a weekend into a hands-on lesson in wireless IoT protocols.
What You'll Build
You’ll assemble and program five ESP32-C3 Super Mini boards: four as battery-powered BLE sensor nodes that read temperature and humidity from DHT22 sensors, and one as the gateway that collects their data, connects to WiFi, and publishes to an MQTT broker. Each node fits inside an ABS enclosure you build yourself, giving you a ready-to-deploy wireless sensor network. The gateway acts as a central hub, letting you monitor real-time environmental data from multiple locations on a single dashboard.
What You'll Learn
- BLE advertising and scanning on the ESP32-C3 platform
- MQTT protocol implementation and broker communication over WiFi
- Power management with LiPo battery and TP4056 charging module
- Hardware assembly, PCB prototyping, and enclosure integration
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
This kit is ideal for CBSE Class 11–12 students building IoT-based science projects, B.Tech ECE/EEE undergraduates tackling mini-projects and internships, and teams at Smart India Hackathon or ATL Tinkering Labs. It’s also perfect for IIT/NIT/VIT/BITS students who want a compact wireless sensor network for smart agriculture prototypes, home automation experiments, or environmental monitoring in campus labs.
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?
Scan the QR code to launch the AI companion. It is trained on this exact project and can guide you through wiring, code, and debugging. WhatsApp and email support are also available if you need human help.
Can I expand to more than four sensor nodes?
The gateway firmware is configured for four nodes, but the AI companion includes guidance on modifying the code to handle additional BLE peripherals, letting you scale the network as needed.
How do I view the sensor data?
The gateway publishes to a public or private MQTT broker. You’ll set up a dashboard on Node-RED, a mobile MQTT client, or ThingsBoard — all with step-by-step instructions from the AI companion.
Is soldering experience necessary?
You’ll need to solder DHT22 and TP4056 modules onto the PCB prototype boards. The kit includes a basic soldering iron and solder wire, and the AI companion offers clear visual references to reduce soldering time.
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